diff --git a/.gitignore b/.gitignore
index 5a08f0a..448e6f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,9 +15,9 @@ Desktop.ini
 *~
 .idea/
 .vscode/
-*.sublime-project
-*.sublime-workspace
-debug-logs/
+*.sublime-project
+*.sublime-workspace
+debug-logs/
 
 # Backend (Go)
 /mengyamonitor-backend/mengyamonitor-backend
@@ -31,6 +31,17 @@ debug-logs/
 /mengyamonitor-backend/debug
 /mengyamonitor-backend/__debug_bin
 
+# Central server (Gin)
+/mengyamonitor-backend-server/mengyamonitor-backend-server
+/mengyamonitor-backend-server/mengyamonitor-backend-server.exe
+/mengyamonitor-backend-server/*.exe
+/mengyamonitor-backend-server/data/
+/mengyamonitor-backend-server/release/
+
+# Metrics client (采集端)
+/mengyamonitor-backend-client/dist/
+/mengyamonitor-backend-client/*.exe
+
 # Frontend (Node/React/Vite)
 /mengyamonitor-frontend/node_modules/
 /mengyamonitor-frontend/dist/
diff --git a/mengyamonitor-backend/README.md b/mengyamonitor-backend-client/README.md
similarity index 100%
rename from mengyamonitor-backend/README.md
rename to mengyamonitor-backend-client/README.md
diff --git a/mengyamonitor-backend-client/build_linux.ps1 b/mengyamonitor-backend-client/build_linux.ps1
new file mode 100644
index 0000000..2a1295c
--- /dev/null
+++ b/mengyamonitor-backend-client/build_linux.ps1
@@ -0,0 +1,40 @@
+# Cross-compile Linux agent (amd64 + arm64). Same as build_linux.sh.
+# Usage: cd mengyamonitor-backend-client; .\build_linux.ps1
+
+$ErrorActionPreference = "Stop"
+$Root = $PSScriptRoot
+Set-Location $Root
+
+$name = if ($env:BINARY_NAME) { $env:BINARY_NAME } else { "mengyamonitor-agent" }
+$out = if ($env:OUT_DIR) { $env:OUT_DIR } else { "dist" }
+
+New-Item -ItemType Directory -Force -Path (Join-Path $out "linux_amd64"), (Join-Path $out "linux_arm64") | Out-Null
+
+$env:CGO_ENABLED = "0"
+
+Write-Host "==> linux/amd64 -> $out/linux_amd64/$name"
+$env:GOOS = "linux"
+$env:GOARCH = "amd64"
+try {
+    $destAmd = Join-Path (Join-Path $out "linux_amd64") $name
+    go build -trimpath -ldflags="-s -w" -o $destAmd .
+}
+finally {
+    Remove-Item Env:GOOS, Env:GOARCH -ErrorAction SilentlyContinue
+}
+
+Write-Host "==> linux/arm64 -> $out/linux_arm64/$name"
+$env:GOOS = "linux"
+$env:GOARCH = "arm64"
+try {
+    $destArm = Join-Path (Join-Path $out "linux_arm64") $name
+    go build -trimpath -ldflags="-s -w" -o $destArm .
+}
+finally {
+    Remove-Item Env:GOOS, Env:GOARCH -ErrorAction SilentlyContinue
+}
+
+Write-Host "Done."
+$p1 = Join-Path (Join-Path $out "linux_amd64") $name
+$p2 = Join-Path (Join-Path $out "linux_arm64") $name
+Get-Item -LiteralPath $p1, $p2 | Format-Table -Property FullName, Length
diff --git a/mengyamonitor-backend-client/build_linux.sh b/mengyamonitor-backend-client/build_linux.sh
new file mode 100644
index 0000000..9a794af
--- /dev/null
+++ b/mengyamonitor-backend-client/build_linux.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# 一键交叉编译 Linux 采集端（amd64 + arm64），输出与 dist/install_mengyamonitor.sh 发布路径一致。
+#
+# 用法（在 mengyamonitor-backend-client 目录下）:
+#   chmod +x build_linux.sh && ./build_linux.sh
+#
+# Windows: Git Bash 同上；或在项目目录执行:  powershell -ExecutionPolicy Bypass -File .\build_linux.ps1
+#
+# 可选环境变量:
+#   BINARY_NAME   默认 mengyamonitor-agent
+#   OUT_DIR       默认 dist（相对本脚本所在目录）
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$ROOT"
+
+NAME="${BINARY_NAME:-mengyamonitor-agent}"
+OUT="${OUT_DIR:-dist}"
+
+mkdir -p "$OUT/linux_amd64" "$OUT/linux_arm64"
+
+export CGO_ENABLED=0
+
+echo "==> linux/amd64 -> $OUT/linux_amd64/$NAME"
+GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w" -o "$OUT/linux_amd64/$NAME" .
+
+echo "==> linux/arm64 -> $OUT/linux_arm64/$NAME"
+GOOS=linux GOARCH=arm64 go build -trimpath -ldflags="-s -w" -o "$OUT/linux_arm64/$NAME" .
+
+echo "完成。产物:"
+for arch in amd64 arm64; do
+	f="$OUT/linux_${arch}/$NAME"
+	if command -v ls >/dev/null 2>&1; then
+		ls -la "$f"
+	else
+		echo "  $f"
+	fi
+done
diff --git a/mengyamonitor-backend/collector.go b/mengyamonitor-backend-client/collector.go
similarity index 100%
rename from mengyamonitor-backend/collector.go
rename to mengyamonitor-backend-client/collector.go
diff --git a/mengyamonitor-backend/cpu.go b/mengyamonitor-backend-client/cpu.go
similarity index 100%
rename from mengyamonitor-backend/cpu.go
rename to mengyamonitor-backend-client/cpu.go
diff --git a/mengyamonitor-backend-client/dashboard_payload.go b/mengyamonitor-backend-client/dashboard_payload.go
new file mode 100644
index 0000000..ba29306
--- /dev/null
+++ b/mengyamonitor-backend-client/dashboard_payload.go
@@ -0,0 +1,25 @@
+package main
+
+import "encoding/json"
+
+// BuildDashboardPayloadJSON builds the same JSON shape the browser expects (including latency).
+// collectorToCentralMs is 采集器到监控中心 TCP 建连毫秒数，失败传 -1。
+func BuildDashboardPayloadJSON(collectorToCentralMs float64) ([]byte, error) {
+	m, err := CollectMetrics()
+	if err != nil {
+		return nil, err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return nil, err
+	}
+	var o map[string]any
+	if err := json.Unmarshal(b, &o); err != nil {
+		return nil, err
+	}
+	o["latency"] = map[string]any{
+		"clientToServer": collectorToCentralMs,
+		"external":       readExternalLatencies(),
+	}
+	return json.Marshal(o)
+}
diff --git a/mengyamonitor-backend/docker.go b/mengyamonitor-backend-client/docker.go
similarity index 100%
rename from mengyamonitor-backend/docker.go
rename to mengyamonitor-backend-client/docker.go
diff --git a/mengyamonitor-backend-client/gen/mengyav1/agent.pb.go b/mengyamonitor-backend-client/gen/mengyav1/agent.pb.go
new file mode 100644
index 0000000..13b78e8
--- /dev/null
+++ b/mengyamonitor-backend-client/gen/mengyav1/agent.pb.go
@@ -0,0 +1,492 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.5
+// 	protoc        v5.28.3
+// source: mengya/v1/agent.proto
+
+package mengyav1
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type AgentMessage struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Payload:
+	//
+	//	*AgentMessage_Hello
+	//	*AgentMessage_Heartbeat
+	//	*AgentMessage_Metrics
+	Payload       isAgentMessage_Payload `protobuf_oneof:"payload"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *AgentMessage) Reset() {
+	*x = AgentMessage{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AgentMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AgentMessage) ProtoMessage() {}
+
+func (x *AgentMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AgentMessage.ProtoReflect.Descriptor instead.
+func (*AgentMessage) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *AgentMessage) GetPayload() isAgentMessage_Payload {
+	if x != nil {
+		return x.Payload
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetHello() *Hello {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Hello); ok {
+			return x.Hello
+		}
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetHeartbeat() *Heartbeat {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Heartbeat); ok {
+			return x.Heartbeat
+		}
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetMetrics() *MetricsReport {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Metrics); ok {
+			return x.Metrics
+		}
+	}
+	return nil
+}
+
+type isAgentMessage_Payload interface {
+	isAgentMessage_Payload()
+}
+
+type AgentMessage_Hello struct {
+	Hello *Hello `protobuf:"bytes,1,opt,name=hello,proto3,oneof"`
+}
+
+type AgentMessage_Heartbeat struct {
+	Heartbeat *Heartbeat `protobuf:"bytes,2,opt,name=heartbeat,proto3,oneof"`
+}
+
+type AgentMessage_Metrics struct {
+	Metrics *MetricsReport `protobuf:"bytes,3,opt,name=metrics,proto3,oneof"`
+}
+
+func (*AgentMessage_Hello) isAgentMessage_Payload() {}
+
+func (*AgentMessage_Heartbeat) isAgentMessage_Payload() {}
+
+func (*AgentMessage_Metrics) isAgentMessage_Payload() {}
+
+type Hello struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	ServerId      string                 `protobuf:"bytes,1,opt,name=server_id,json=serverId,proto3" json:"server_id,omitempty"`
+	AgentKey      string                 `protobuf:"bytes,2,opt,name=agent_key,json=agentKey,proto3" json:"agent_key,omitempty"`
+	Hostname      string                 `protobuf:"bytes,3,opt,name=hostname,proto3" json:"hostname,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Hello) Reset() {
+	*x = Hello{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Hello) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Hello) ProtoMessage() {}
+
+func (x *Hello) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Hello.ProtoReflect.Descriptor instead.
+func (*Hello) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Hello) GetServerId() string {
+	if x != nil {
+		return x.ServerId
+	}
+	return ""
+}
+
+func (x *Hello) GetAgentKey() string {
+	if x != nil {
+		return x.AgentKey
+	}
+	return ""
+}
+
+func (x *Hello) GetHostname() string {
+	if x != nil {
+		return x.Hostname
+	}
+	return ""
+}
+
+type Heartbeat struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Heartbeat) Reset() {
+	*x = Heartbeat{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Heartbeat) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Heartbeat) ProtoMessage() {}
+
+func (x *Heartbeat) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Heartbeat.ProtoReflect.Descriptor instead.
+func (*Heartbeat) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{2}
+}
+
+type MetricsReport struct {
+	state             protoimpl.MessageState `protogen:"open.v1"`
+	PayloadJson       string                 `protobuf:"bytes,1,opt,name=payload_json,json=payloadJson,proto3" json:"payload_json,omitempty"`
+	CollectedAtUnixMs int64                  `protobuf:"varint,2,opt,name=collected_at_unix_ms,json=collectedAtUnixMs,proto3" json:"collected_at_unix_ms,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
+}
+
+func (x *MetricsReport) Reset() {
+	*x = MetricsReport{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *MetricsReport) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MetricsReport) ProtoMessage() {}
+
+func (x *MetricsReport) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MetricsReport.ProtoReflect.Descriptor instead.
+func (*MetricsReport) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *MetricsReport) GetPayloadJson() string {
+	if x != nil {
+		return x.PayloadJson
+	}
+	return ""
+}
+
+func (x *MetricsReport) GetCollectedAtUnixMs() int64 {
+	if x != nil {
+		return x.CollectedAtUnixMs
+	}
+	return 0
+}
+
+type ControlMessage struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Payload:
+	//
+	//	*ControlMessage_Ack
+	Payload       isControlMessage_Payload `protobuf_oneof:"payload"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ControlMessage) Reset() {
+	*x = ControlMessage{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ControlMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ControlMessage) ProtoMessage() {}
+
+func (x *ControlMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[4]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ControlMessage.ProtoReflect.Descriptor instead.
+func (*ControlMessage) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *ControlMessage) GetPayload() isControlMessage_Payload {
+	if x != nil {
+		return x.Payload
+	}
+	return nil
+}
+
+func (x *ControlMessage) GetAck() *Ack {
+	if x != nil {
+		if x, ok := x.Payload.(*ControlMessage_Ack); ok {
+			return x.Ack
+		}
+	}
+	return nil
+}
+
+type isControlMessage_Payload interface {
+	isControlMessage_Payload()
+}
+
+type ControlMessage_Ack struct {
+	Ack *Ack `protobuf:"bytes,1,opt,name=ack,proto3,oneof"`
+}
+
+func (*ControlMessage_Ack) isControlMessage_Payload() {}
+
+type Ack struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Message       string                 `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Ack) Reset() {
+	*x = Ack{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Ack) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Ack) ProtoMessage() {}
+
+func (x *Ack) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[5]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Ack.ProtoReflect.Descriptor instead.
+func (*Ack) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *Ack) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_mengya_v1_agent_proto protoreflect.FileDescriptor
+
+var file_mengya_v1_agent_proto_rawDesc = string([]byte{
+	0x0a, 0x15, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2f, 0x76, 0x31, 0x2f, 0x61, 0x67, 0x65, 0x6e,
+	0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x09, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e,
+	0x76, 0x31, 0x22, 0xaf, 0x01, 0x0a, 0x0c, 0x41, 0x67, 0x65, 0x6e, 0x74, 0x4d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x12, 0x28, 0x0a, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x0b, 0x32, 0x10, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x48,
+	0x65, 0x6c, 0x6c, 0x6f, 0x48, 0x00, 0x52, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x12, 0x34, 0x0a,
+	0x09, 0x68, 0x65, 0x61, 0x72, 0x74, 0x62, 0x65, 0x61, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b,
+	0x32, 0x14, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x48, 0x65, 0x61,
+	0x72, 0x74, 0x62, 0x65, 0x61, 0x74, 0x48, 0x00, 0x52, 0x09, 0x68, 0x65, 0x61, 0x72, 0x74, 0x62,
+	0x65, 0x61, 0x74, 0x12, 0x34, 0x0a, 0x07, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x18, 0x03,
+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x18, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31,
+	0x2e, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x52, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x48, 0x00,
+	0x52, 0x07, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x42, 0x09, 0x0a, 0x07, 0x70, 0x61, 0x79,
+	0x6c, 0x6f, 0x61, 0x64, 0x22, 0x5d, 0x0a, 0x05, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x12, 0x1b, 0x0a,
+	0x09, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
+	0x52, 0x08, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x49, 0x64, 0x12, 0x1b, 0x0a, 0x09, 0x61, 0x67,
+	0x65, 0x6e, 0x74, 0x5f, 0x6b, 0x65, 0x79, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x61,
+	0x67, 0x65, 0x6e, 0x74, 0x4b, 0x65, 0x79, 0x12, 0x1a, 0x0a, 0x08, 0x68, 0x6f, 0x73, 0x74, 0x6e,
+	0x61, 0x6d, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x68, 0x6f, 0x73, 0x74, 0x6e,
+	0x61, 0x6d, 0x65, 0x22, 0x0b, 0x0a, 0x09, 0x48, 0x65, 0x61, 0x72, 0x74, 0x62, 0x65, 0x61, 0x74,
+	0x22, 0x63, 0x0a, 0x0d, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x52, 0x65, 0x70, 0x6f, 0x72,
+	0x74, 0x12, 0x21, 0x0a, 0x0c, 0x70, 0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x5f, 0x6a, 0x73, 0x6f,
+	0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x70, 0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64,
+	0x4a, 0x73, 0x6f, 0x6e, 0x12, 0x2f, 0x0a, 0x14, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x65,
+	0x64, 0x5f, 0x61, 0x74, 0x5f, 0x75, 0x6e, 0x69, 0x78, 0x5f, 0x6d, 0x73, 0x18, 0x02, 0x20, 0x01,
+	0x28, 0x03, 0x52, 0x11, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x65, 0x64, 0x41, 0x74, 0x55,
+	0x6e, 0x69, 0x78, 0x4d, 0x73, 0x22, 0x3f, 0x0a, 0x0e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c,
+	0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x22, 0x0a, 0x03, 0x61, 0x63, 0x6b, 0x18, 0x01,
+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x0e, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31,
+	0x2e, 0x41, 0x63, 0x6b, 0x48, 0x00, 0x52, 0x03, 0x61, 0x63, 0x6b, 0x42, 0x09, 0x0a, 0x07, 0x70,
+	0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x22, 0x1f, 0x0a, 0x03, 0x41, 0x63, 0x6b, 0x12, 0x18, 0x0a,
+	0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07,
+	0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x32, 0x50, 0x0a, 0x0b, 0x41, 0x67, 0x65, 0x6e, 0x74,
+	0x49, 0x6e, 0x67, 0x65, 0x73, 0x74, 0x12, 0x41, 0x0a, 0x07, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63,
+	0x74, 0x12, 0x17, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x41, 0x67,
+	0x65, 0x6e, 0x74, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x1a, 0x19, 0x2e, 0x6d, 0x65, 0x6e,
+	0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x4d, 0x65,
+	0x73, 0x73, 0x61, 0x67, 0x65, 0x28, 0x01, 0x30, 0x01, 0x42, 0x3d, 0x5a, 0x3b, 0x6d, 0x65, 0x6e,
+	0x67, 0x79, 0x61, 0x6d, 0x6f, 0x6e, 0x69, 0x74, 0x6f, 0x72, 0x2d, 0x62, 0x61, 0x63, 0x6b, 0x65,
+	0x6e, 0x64, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
+	0x61, 0x6c, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x76, 0x31, 0x3b,
+	0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+})
+
+var (
+	file_mengya_v1_agent_proto_rawDescOnce sync.Once
+	file_mengya_v1_agent_proto_rawDescData []byte
+)
+
+func file_mengya_v1_agent_proto_rawDescGZIP() []byte {
+	file_mengya_v1_agent_proto_rawDescOnce.Do(func() {
+		file_mengya_v1_agent_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_mengya_v1_agent_proto_rawDesc), len(file_mengya_v1_agent_proto_rawDesc)))
+	})
+	return file_mengya_v1_agent_proto_rawDescData
+}
+
+var file_mengya_v1_agent_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_mengya_v1_agent_proto_goTypes = []any{
+	(*AgentMessage)(nil),   // 0: mengya.v1.AgentMessage
+	(*Hello)(nil),          // 1: mengya.v1.Hello
+	(*Heartbeat)(nil),      // 2: mengya.v1.Heartbeat
+	(*MetricsReport)(nil),  // 3: mengya.v1.MetricsReport
+	(*ControlMessage)(nil), // 4: mengya.v1.ControlMessage
+	(*Ack)(nil),            // 5: mengya.v1.Ack
+}
+var file_mengya_v1_agent_proto_depIdxs = []int32{
+	1, // 0: mengya.v1.AgentMessage.hello:type_name -> mengya.v1.Hello
+	2, // 1: mengya.v1.AgentMessage.heartbeat:type_name -> mengya.v1.Heartbeat
+	3, // 2: mengya.v1.AgentMessage.metrics:type_name -> mengya.v1.MetricsReport
+	5, // 3: mengya.v1.ControlMessage.ack:type_name -> mengya.v1.Ack
+	0, // 4: mengya.v1.AgentIngest.Connect:input_type -> mengya.v1.AgentMessage
+	4, // 5: mengya.v1.AgentIngest.Connect:output_type -> mengya.v1.ControlMessage
+	5, // [5:6] is the sub-list for method output_type
+	4, // [4:5] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
+}
+
+func init() { file_mengya_v1_agent_proto_init() }
+func file_mengya_v1_agent_proto_init() {
+	if File_mengya_v1_agent_proto != nil {
+		return
+	}
+	file_mengya_v1_agent_proto_msgTypes[0].OneofWrappers = []any{
+		(*AgentMessage_Hello)(nil),
+		(*AgentMessage_Heartbeat)(nil),
+		(*AgentMessage_Metrics)(nil),
+	}
+	file_mengya_v1_agent_proto_msgTypes[4].OneofWrappers = []any{
+		(*ControlMessage_Ack)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_mengya_v1_agent_proto_rawDesc), len(file_mengya_v1_agent_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   6,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_mengya_v1_agent_proto_goTypes,
+		DependencyIndexes: file_mengya_v1_agent_proto_depIdxs,
+		MessageInfos:      file_mengya_v1_agent_proto_msgTypes,
+	}.Build()
+	File_mengya_v1_agent_proto = out.File
+	file_mengya_v1_agent_proto_goTypes = nil
+	file_mengya_v1_agent_proto_depIdxs = nil
+}
diff --git a/mengyamonitor-backend-client/gen/mengyav1/agent_grpc.pb.go b/mengyamonitor-backend-client/gen/mengyav1/agent_grpc.pb.go
new file mode 100644
index 0000000..d5aa41a
--- /dev/null
+++ b/mengyamonitor-backend-client/gen/mengyav1/agent_grpc.pb.go
@@ -0,0 +1,119 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.28.3
+// source: mengya/v1/agent.proto
+
+package mengyav1
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	AgentIngest_Connect_FullMethodName = "/mengya.v1.AgentIngest/Connect"
+)
+
+// AgentIngestClient is the client API for AgentIngest service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+//
+// AgentIngest: 采集端出站连接，双向流上报指标。
+type AgentIngestClient interface {
+	Connect(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[AgentMessage, ControlMessage], error)
+}
+
+type agentIngestClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAgentIngestClient(cc grpc.ClientConnInterface) AgentIngestClient {
+	return &agentIngestClient{cc}
+}
+
+func (c *agentIngestClient) Connect(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[AgentMessage, ControlMessage], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &AgentIngest_ServiceDesc.Streams[0], AgentIngest_Connect_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[AgentMessage, ControlMessage]{ClientStream: stream}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type AgentIngest_ConnectClient = grpc.BidiStreamingClient[AgentMessage, ControlMessage]
+
+// AgentIngestServer is the server API for AgentIngest service.
+// All implementations must embed UnimplementedAgentIngestServer
+// for forward compatibility.
+//
+// AgentIngest: 采集端出站连接，双向流上报指标。
+type AgentIngestServer interface {
+	Connect(grpc.BidiStreamingServer[AgentMessage, ControlMessage]) error
+	mustEmbedUnimplementedAgentIngestServer()
+}
+
+// UnimplementedAgentIngestServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedAgentIngestServer struct{}
+
+func (UnimplementedAgentIngestServer) Connect(grpc.BidiStreamingServer[AgentMessage, ControlMessage]) error {
+	return status.Errorf(codes.Unimplemented, "method Connect not implemented")
+}
+func (UnimplementedAgentIngestServer) mustEmbedUnimplementedAgentIngestServer() {}
+func (UnimplementedAgentIngestServer) testEmbeddedByValue()                     {}
+
+// UnsafeAgentIngestServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to AgentIngestServer will
+// result in compilation errors.
+type UnsafeAgentIngestServer interface {
+	mustEmbedUnimplementedAgentIngestServer()
+}
+
+func RegisterAgentIngestServer(s grpc.ServiceRegistrar, srv AgentIngestServer) {
+	// If the following call pancis, it indicates UnimplementedAgentIngestServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&AgentIngest_ServiceDesc, srv)
+}
+
+func _AgentIngest_Connect_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(AgentIngestServer).Connect(&grpc.GenericServerStream[AgentMessage, ControlMessage]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type AgentIngest_ConnectServer = grpc.BidiStreamingServer[AgentMessage, ControlMessage]
+
+// AgentIngest_ServiceDesc is the grpc.ServiceDesc for AgentIngest service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var AgentIngest_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "mengya.v1.AgentIngest",
+	HandlerType: (*AgentIngestServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Connect",
+			Handler:       _AgentIngest_Connect_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "mengya/v1/agent.proto",
+}
diff --git a/mengyamonitor-backend-client/go.mod b/mengyamonitor-backend-client/go.mod
new file mode 100644
index 0000000..dbbcf95
--- /dev/null
+++ b/mengyamonitor-backend-client/go.mod
@@ -0,0 +1,15 @@
+module mengyamonitor-backend
+
+go 1.22
+
+require (
+	google.golang.org/grpc v1.70.0
+	google.golang.org/protobuf v1.35.2
+)
+
+require (
+	golang.org/x/net v0.32.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a // indirect
+)
diff --git a/mengyamonitor-backend-client/go.sum b/mengyamonitor-backend-client/go.sum
new file mode 100644
index 0000000..3962e2d
--- /dev/null
+++ b/mengyamonitor-backend-client/go.sum
@@ -0,0 +1,32 @@
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+go.opentelemetry.io/otel v1.32.0 h1:WnBN+Xjcteh0zdk01SVqV55d/m62NJLJdIyb4y/WO5U=
+go.opentelemetry.io/otel v1.32.0/go.mod h1:00DCVSB0RQcnzlwyTfqtxSm+DRr9hpYrHjNGiBHVQIg=
+go.opentelemetry.io/otel/metric v1.32.0 h1:xV2umtmNcThh2/a/aCP+h64Xx5wsj8qqnkYZktzNa0M=
+go.opentelemetry.io/otel/metric v1.32.0/go.mod h1:jH7CIbbK6SH2V2wE16W05BHCtIDzauciCRLoc/SyMv8=
+go.opentelemetry.io/otel/sdk v1.32.0 h1:RNxepc9vK59A8XsgZQouW8ue8Gkb4jpWtJm9ge5lEG4=
+go.opentelemetry.io/otel/sdk v1.32.0/go.mod h1:LqgegDBjKMmb2GC6/PrTnteJG39I8/vJCAP9LlJXEjU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0 h1:rZvFnvmvawYb0alrYkjraqJq0Z4ZUJAiyYCU9snn1CU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0/go.mod h1:PWeZlq0zt9YkYAp3gjKZ0eicRYvOh1Gd+X99x6GHpCQ=
+go.opentelemetry.io/otel/trace v1.32.0 h1:WIC9mYrXf8TmY/EXuULKc8hR17vE+Hjv2cssQDe03fM=
+go.opentelemetry.io/otel/trace v1.32.0/go.mod h1:+i4rkvCraA+tG6AzwloGaCtkx53Fa+L+V8e9a7YvhT8=
+golang.org/x/net v0.32.0 h1:ZqPmj8Kzc+Y6e0+skZsuACbx+wzMgo5MQsJh9Qd6aYI=
+golang.org/x/net v0.32.0/go.mod h1:CwU0IoeOlnQQWJ6ioyFrfRuomB8GKF6KbYXZVyeXNfs=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a h1:hgh8P4EuoxpsuKMXX/To36nOFD7vixReXgn8lPGnt+o=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a/go.mod h1:5uTbfoYQed2U9p3KIj2/Zzm02PYhndfdmML0qC3q3FU=
+google.golang.org/grpc v1.70.0 h1:pWFv03aZoHzlRKHWicjsZytKAiYCtNS0dHbXnIdq7jQ=
+google.golang.org/grpc v1.70.0/go.mod h1:ofIJqVKDXx/JiXrwr2IG4/zwdH9txy3IlF40RmcJSQw=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
diff --git a/mengyamonitor-backend/gpu.go b/mengyamonitor-backend-client/gpu.go
similarity index 100%
rename from mengyamonitor-backend/gpu.go
rename to mengyamonitor-backend-client/gpu.go
diff --git a/mengyamonitor-backend-client/grpc_reporter.go b/mengyamonitor-backend-client/grpc_reporter.go
new file mode 100644
index 0000000..c9089f8
--- /dev/null
+++ b/mengyamonitor-backend-client/grpc_reporter.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"context"
+	"io"
+	"log"
+	"os"
+	"time"
+
+	mengyav1 "mengyamonitor-backend/gen/mengyav1"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+func runGRPCLoop(addr, serverID, key string) {
+	backoff := time.Second
+	const maxBackoff = 30 * time.Second
+	for {
+		err := runGRPCSession(addr, serverID, key)
+		if err != nil {
+			log.Printf("grpc reporter: session ended: %v (reconnect in %v)", err, backoff)
+			time.Sleep(backoff)
+			if backoff < maxBackoff {
+				backoff *= 2
+			}
+			continue
+		}
+		backoff = time.Second
+	}
+}
+
+func runGRPCSession(addr, serverID, key string) error {
+	ctx := context.Background()
+	conn, err := grpc.NewClient(addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	cli := mengyav1.NewAgentIngestClient(conn)
+	stream, err := cli.Connect(ctx)
+	if err != nil {
+		return err
+	}
+
+	host, _ := os.Hostname()
+	if err := stream.Send(&mengyav1.AgentMessage{
+		Payload: &mengyav1.AgentMessage_Hello{
+			Hello: &mengyav1.Hello{ServerId: serverID, AgentKey: key, Hostname: host},
+		},
+	}); err != nil {
+		return err
+	}
+
+	errCh := make(chan error, 1)
+	go func() {
+		for {
+			_, err := stream.Recv()
+			if err != nil {
+				errCh <- err
+				return
+			}
+		}
+	}()
+
+	tick := time.NewTicker(2 * time.Second)
+	defer tick.Stop()
+
+	for {
+		select {
+		case err := <-errCh:
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		case <-tick.C:
+			centralMs := measureCollectorToCentralTCP(addr, 3*time.Second)
+			payload, err := BuildDashboardPayloadJSON(centralMs)
+			if err != nil {
+				log.Printf("grpc reporter: collect: %v", err)
+				continue
+			}
+			if err := stream.Send(&mengyav1.AgentMessage{
+				Payload: &mengyav1.AgentMessage_Metrics{
+					Metrics: &mengyav1.MetricsReport{
+						PayloadJson:         string(payload),
+						CollectedAtUnixMs: time.Now().UnixMilli(),
+					},
+				},
+			}); err != nil {
+				return err
+			}
+		}
+	}
+}
diff --git a/mengyamonitor-backend-client/latency.go b/mengyamonitor-backend-client/latency.go
new file mode 100644
index 0000000..98efd15
--- /dev/null
+++ b/mengyamonitor-backend-client/latency.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"strings"
+	"time"
+)
+
+// LatencyInfo 延迟信息（均由采集端在本机测量）
+type LatencyInfo struct {
+	ClientToServer float64           `json:"clientToServer"` // 采集器 → 监控中心 gRPC 地址的 TCP 建连耗时（ms），失败为 -1
+	External       map[string]string `json:"external"`       // 采集器对外站点的 TCP 建连耗时（同 checkExternalLatency）
+}
+
+// normalizeGRPCDialTarget strips common grpc-go target prefixes; expects host:port or [ipv6]:port.
+func normalizeGRPCDialTarget(addr string) string {
+	a := strings.TrimSpace(addr)
+	a = strings.TrimPrefix(a, "dns:///")
+	a = strings.TrimPrefix(a, "dns://")
+	return strings.TrimSpace(a)
+}
+
+// measureCollectorToCentralTCP returns TCP connect time in ms to the central gRPC dial target, or -1 on failure.
+func measureCollectorToCentralTCP(grpcAddr string, timeout time.Duration) float64 {
+	target := normalizeGRPCDialTarget(grpcAddr)
+	if target == "" || strings.HasPrefix(strings.ToLower(target), "unix:") {
+		return -1
+	}
+	start := time.Now()
+	conn, err := net.DialTimeout("tcp", target, timeout)
+	if err != nil {
+		return -1
+	}
+	_ = conn.Close()
+	return float64(time.Since(start).Microseconds()) / 1000.0
+}
+
+// checkExternalLatency 检测外部网站延迟
+func checkExternalLatency(host string, timeout time.Duration) string {
+	start := time.Now()
+	
+	// 尝试 TCP 连接 80 端口
+	conn, err := net.DialTimeout("tcp", host+":80", timeout)
+	if err != nil {
+		// 如果 80 端口失败，尝试 443 (HTTPS)
+		conn, err = net.DialTimeout("tcp", host+":443", timeout)
+		if err != nil {
+			return "超时"
+		}
+	}
+	defer conn.Close()
+
+	// 使用微秒换算，避免 Milliseconds() 截断成 0 ms 误导用户
+	ms := float64(time.Since(start).Microseconds()) / 1000.0
+	if ms < 1 {
+		return fmt.Sprintf("%.1f ms", ms)
+	}
+	return fmt.Sprintf("%.0f ms", ms)
+}
+
+// readExternalLatencies 读取外部网站延迟
+func readExternalLatencies() map[string]string {
+	latencies := make(map[string]string)
+	timeout := 3 * time.Second
+
+	// 检测百度
+	latencies["baidu.com"] = checkExternalLatency("baidu.com", timeout)
+
+	// 检测谷歌
+	latencies["google.com"] = checkExternalLatency("google.com", timeout)
+
+	// 检测 GitHub
+	latencies["github.com"] = checkExternalLatency("github.com", timeout)
+
+	return latencies
+}
+
diff --git a/mengyamonitor-backend-client/main.go b/mengyamonitor-backend-client/main.go
new file mode 100644
index 0000000..3eeb8bc
--- /dev/null
+++ b/mengyamonitor-backend-client/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"log"
+	"os"
+)
+
+func main() {
+	addr := os.Getenv("CENTRAL_GRPC")
+	serverID := os.Getenv("SERVER_ID")
+	key := os.Getenv("AGENT_KEY")
+	if addr == "" || serverID == "" || key == "" {
+		log.Fatal("mengyamonitor agent requires CENTRAL_GRPC, SERVER_ID, and AGENT_KEY")
+	}
+	log.Printf("agent reporting via gRPC to %s (server_id=%s)", addr, serverID)
+	runGRPCLoop(addr, serverID, key)
+}
diff --git a/mengyamonitor-backend-client/memory.go b/mengyamonitor-backend-client/memory.go
new file mode 100644
index 0000000..e0b0229
--- /dev/null
+++ b/mengyamonitor-backend-client/memory.go
@@ -0,0 +1,127 @@
+package main
+
+import (
+	"bufio"
+	"os"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+// readMemory 读取内存信息
+func readMemory() (MemoryMetrics, error) {
+	totals := map[string]uint64{}
+	f, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return MemoryMetrics{}, err
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		parts := strings.Split(line, ":")
+		if len(parts) < 2 {
+			continue
+		}
+		key := strings.TrimSpace(parts[0])
+		fields := strings.Fields(strings.TrimSpace(parts[1]))
+		if len(fields) == 0 {
+			continue
+		}
+		value, err := strconv.ParseUint(fields[0], 10, 64)
+		if err != nil {
+			continue
+		}
+		totals[key] = value * 1024 // kB to bytes
+	}
+	total := totals["MemTotal"]
+
+	// 优先使用 MemAvailable（Linux 3.14+），如果没有则计算
+	var free uint64
+	if available, ok := totals["MemAvailable"]; ok && available > 0 {
+		free = available
+	} else {
+		// 回退到 MemFree + Buffers + Cached（适用于较老的系统）
+		free = totals["MemFree"]
+		if buffers, ok := totals["Buffers"]; ok {
+			free += buffers
+		}
+		if cached, ok := totals["Cached"]; ok {
+			free += cached
+		}
+	}
+
+	used := total - free
+	usedPercent := 0.0
+	if total > 0 {
+		usedPercent = (float64(used) / float64(total)) * 100
+	}
+
+	swapTotal := totals["SwapTotal"]
+	swapFree := totals["SwapFree"]
+	swapUsed := uint64(0)
+	if swapTotal >= swapFree {
+		swapUsed = swapTotal - swapFree
+	}
+	swapUsedPct := 0.0
+	if swapTotal > 0 {
+		swapUsedPct = (float64(swapUsed) / float64(swapTotal)) * 100
+	}
+	swapType := summarizeSwapTypes(swapTotal)
+
+	return MemoryMetrics{
+		TotalBytes:      total,
+		UsedBytes:       used,
+		FreeBytes:       free,
+		UsedPercent:     round(usedPercent, 2),
+		SwapTotalBytes:  swapTotal,
+		SwapUsedBytes:   swapUsed,
+		SwapFreeBytes:   swapFree,
+		SwapUsedPercent: round(swapUsedPct, 2),
+		SwapType:        swapType,
+	}, nil
+}
+
+// summarizeSwapTypes 根据 /proc/swaps 汇总交换区类型（file / partition / zram 等）；无 swap 时为「无」
+func summarizeSwapTypes(swapTotalFromMeminfo uint64) string {
+	if swapTotalFromMeminfo == 0 {
+		return "无"
+	}
+	f, err := os.Open("/proc/swaps")
+	if err != nil {
+		return "未知"
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	lineNum := 0
+	seen := map[string]struct{}{}
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		lineNum++
+		if lineNum == 1 || line == "" {
+			continue
+		}
+		fields := strings.Fields(line)
+		if len(fields) < 2 {
+			continue
+		}
+		filename := fields[0]
+		typ := fields[1]
+		if strings.Contains(strings.ToLower(filename), "zram") {
+			typ = "zram"
+		}
+		seen[typ] = struct{}{}
+	}
+	if len(seen) == 0 {
+		if swapTotalFromMeminfo > 0 {
+			return "未知"
+		}
+		return "无"
+	}
+	list := make([]string, 0, len(seen))
+	for t := range seen {
+		list = append(list, t)
+	}
+	sort.Strings(list)
+	return strings.Join(list, " + ")
+}
diff --git a/mengyamonitor-backend/network.go b/mengyamonitor-backend-client/network.go
similarity index 100%
rename from mengyamonitor-backend/network.go
rename to mengyamonitor-backend-client/network.go
diff --git a/mengyamonitor-backend/system.go b/mengyamonitor-backend-client/system.go
similarity index 85%
rename from mengyamonitor-backend/system.go
rename to mengyamonitor-backend-client/system.go
index 0d81d1c..a13a9b4 100644
--- a/mengyamonitor-backend/system.go
+++ b/mengyamonitor-backend-client/system.go
@@ -1,390 +1,436 @@
-package main
-
-import (
-	"bufio"
-	"context"
-	"os"
-	"os/exec"
-	"strconv"
-	"strings"
-	"time"
-)
-
-// readSystemStats 读取系统统计信息
-func readSystemStats() SystemStats {
-	stats := SystemStats{}
-
-	// 读取进程数量
-	stats.ProcessCount = countProcesses()
-
-	// 读取已安装包数量和包管理器类型
-	stats.PackageCount, stats.PackageManager = countPackages()
-
-	// 读取系统温度
-	stats.Temperature = readSystemTemperature()
-
-	// 读取磁盘读写速度
-	stats.DiskReadSpeed, stats.DiskWriteSpeed = readDiskSpeed()
-
-	// 读取 Top 5 进程
-	stats.TopProcesses = readTopProcesses()
-
-	// 读取系统日志
-	stats.SystemLogs = readSystemLogs(10)
-
-	return stats
-}
-
-func countProcesses() int {
-	entries, err := os.ReadDir("/proc")
-	if err != nil {
-		return 0
-	}
-	count := 0
-	for _, entry := range entries {
-		if entry.IsDir() {
-			// 进程目录是数字命名的
-			if _, err := strconv.Atoi(entry.Name()); err == nil {
-				count++
-			}
-		}
-	}
-	return count
-}
-
-func countPackages() (int, string) {
-	// 尝试不同的包管理器
-	// dpkg (Debian/Ubuntu)
-	if _, err := exec.LookPath("dpkg"); err == nil {
-		cmd := exec.Command("dpkg", "-l")
-		out, err := cmd.Output()
-		if err == nil {
-			lines := strings.Split(string(out), "\n")
-			count := 0
-			for _, line := range lines {
-				if strings.HasPrefix(line, "ii ") {
-					count++
-				}
-			}
-			return count, "dpkg (apt)"
-		}
-	}
-
-	// rpm (RedHat/CentOS/Fedora)
-	if _, err := exec.LookPath("rpm"); err == nil {
-		cmd := exec.Command("rpm", "-qa")
-		out, err := cmd.Output()
-		if err == nil {
-			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
-			return len(lines), "rpm (yum/dnf)"
-		}
-	}
-
-	// pacman (Arch Linux)
-	if _, err := exec.LookPath("pacman"); err == nil {
-		cmd := exec.Command("pacman", "-Q")
-		out, err := cmd.Output()
-		if err == nil {
-			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
-			return len(lines), "pacman"
-		}
-	}
-
-	return 0, "unknown"
-}
-
-func readSystemTemperature() float64 {
-	var cpuTemp float64 = 0
-	var fallbackTemp float64 = 0
-
-	// 1. 优先读取 thermal_zone (通常是 CPU 温度)
-	thermalDir := "/sys/class/thermal"
-	entries, err := os.ReadDir(thermalDir)
-	if err == nil {
-		for _, entry := range entries {
-			if !strings.HasPrefix(entry.Name(), "thermal_zone") {
-				continue
-			}
-			tempPath := thermalDir + "/" + entry.Name() + "/temp"
-			if temp := readTempFromFile(tempPath); temp > 0 && temp > 20 && temp < 120 {
-				// thermal_zone0 通常是 CPU
-				if entry.Name() == "thermal_zone0" {
-					cpuTemp = temp
-					break
-				} else if fallbackTemp == 0 {
-					fallbackTemp = temp
-				}
-			}
-		}
-	}
-
-	// 2. 扫描所有 hwmon 设备，查找 CPU 温度
-	hwmonDir := "/sys/class/hwmon"
-	entries, err = os.ReadDir(hwmonDir)
-	if err == nil {
-		for _, entry := range entries {
-			hwmonPath := hwmonDir + "/" + entry.Name()
-			
-			// 读取 name 文件，检查是否是 CPU 相关
-			namePath := hwmonPath + "/name"
-			name := strings.ToLower(strings.TrimSpace(readFirstLine(namePath)))
-			
-			// 检查是否是 CPU 温度传感器
-			isCPU := strings.Contains(name, "cpu") ||
-				strings.Contains(name, "core") ||
-				strings.Contains(name, "k10temp") ||
-				strings.Contains(name, "coretemp") ||
-				strings.Contains(name, "zenpower")
-			
-			// 尝试读取 temp1_input (通常是 CPU)
-			temp1Path := hwmonPath + "/temp1_input"
-			if temp := readTempFromFile(temp1Path); temp > 0 && temp > 20 && temp < 120 {
-				if isCPU {
-					cpuTemp = temp
-					break
-				} else if fallbackTemp == 0 {
-					fallbackTemp = temp
-				}
-			}
-			
-			// 也尝试 temp2_input
-			temp2Path := hwmonPath + "/temp2_input"
-			if temp := readTempFromFile(temp2Path); temp > 0 && temp > 20 && temp < 120 {
-				if isCPU && cpuTemp == 0 {
-					cpuTemp = temp
-				} else if fallbackTemp == 0 {
-					fallbackTemp = temp
-				}
-			}
-		}
-	}
-
-	// 优先返回 CPU 温度，如果没有则返回其他温度
-	if cpuTemp > 0 {
-		return cpuTemp
-	}
-	return fallbackTemp
-}
-
-// readDiskSpeed 读取磁盘瞬时读写速度 (MB/s)
-func readDiskSpeed() (float64, float64) {
-	// 第一次读取
-	readSectors1, writeSectors1 := getDiskSectors()
-	if readSectors1 == 0 && writeSectors1 == 0 {
-		return 0, 0
-	}
-
-	// 等待1秒
-	time.Sleep(1 * time.Second)
-
-	// 第二次读取
-	readSectors2, writeSectors2 := getDiskSectors()
-
-	// 计算差值（扇区数）
-	readDiff := readSectors2 - readSectors1
-	writeDiff := writeSectors2 - writeSectors1
-
-	// 扇区大小通常是 512 字节，转换为 MB/s
-	readSpeed := float64(readDiff) * 512 / 1024 / 1024
-	writeSpeed := float64(writeDiff) * 512 / 1024 / 1024
-
-	return round(readSpeed, 2), round(writeSpeed, 2)
-}
-
-func getDiskSectors() (uint64, uint64) {
-	f, err := os.Open("/proc/diskstats")
-	if err != nil {
-		return 0, 0
-	}
-	defer f.Close()
-
-	scanner := bufio.NewScanner(f)
-	
-	var maxRead uint64 = 0
-	var mainDevice string
-
-	// 第一次遍历：找到读写量最大的主磁盘（通常是系统盘）
-	for scanner.Scan() {
-		line := scanner.Text()
-		fields := strings.Fields(line)
-		if len(fields) < 14 {
-			continue
-		}
-
-		deviceName := fields[2]
-		// 跳过分区（分区名通常包含数字，如 sda1, vda1, nvme0n1p1）
-		if strings.ContainsAny(deviceName, "0123456789") && 
-		   !strings.HasPrefix(deviceName, "nvme") && 
-		   !strings.HasPrefix(deviceName, "loop") {
-			continue
-		}
-
-		// 跳过虚拟设备
-		if strings.HasPrefix(deviceName, "loop") || 
-		   strings.HasPrefix(deviceName, "ram") ||
-		   strings.HasPrefix(deviceName, "zram") {
-			continue
-		}
-
-		readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
-		// 选择读写量最大的作为主磁盘
-		if readSectors > maxRead {
-			maxRead = readSectors
-			mainDevice = deviceName
-		}
-	}
-
-	// 第二次遍历：读取主磁盘的数据
-	f.Close()
-	f, err = os.Open("/proc/diskstats")
-	if err != nil {
-		return 0, 0
-	}
-	scanner = bufio.NewScanner(f)
-	for scanner.Scan() {
-		line := scanner.Text()
-		fields := strings.Fields(line)
-		if len(fields) < 14 {
-			continue
-		}
-
-		if fields[2] == mainDevice {
-			readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
-			writeSectors, _ := strconv.ParseUint(fields[9], 10, 64)
-			return readSectors, writeSectors
-		}
-	}
-
-	// 如果没找到，尝试常见的设备名（向后兼容）
-	f.Close()
-	f, err = os.Open("/proc/diskstats")
-	if err != nil {
-		return 0, 0
-	}
-	scanner = bufio.NewScanner(f)
-	for scanner.Scan() {
-		line := scanner.Text()
-		fields := strings.Fields(line)
-		if len(fields) < 14 {
-			continue
-		}
-
-		deviceName := fields[2]
-		if deviceName == "sda" || deviceName == "vda" || deviceName == "nvme0n1" {
-			readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
-			writeSectors, _ := strconv.ParseUint(fields[9], 10, 64)
-			return readSectors, writeSectors
-		}
-	}
-
-	return 0, 0
-}
-
-// readTopProcesses 读取 Top 5 进程 (按 CPU 使用率)
-func readTopProcesses() []ProcessInfo {
-	processes := []ProcessInfo{}
-
-	// 读取系统总内存
-	memInfo, _ := readMemory()
-	totalMemGB := float64(memInfo.TotalBytes) / 1024 / 1024 / 1024
-
-	// 使用 ps 命令获取进程信息，添加超时控制
-	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	cmd := exec.CommandContext(ctx, "ps", "aux", "--sort=-%cpu", "--no-headers")
-	out, err := cmd.Output()
-	if err != nil {
-		return processes
-	}
-
-	lines := strings.Split(string(out), "\n")
-	count := 0
-
-	for _, line := range lines {
-		if count >= 5 { // 只取前5个
-			break
-		}
-
-		line = strings.TrimSpace(line)
-		if line == "" {
-			continue
-		}
-
-		fields := strings.Fields(line)
-		if len(fields) < 11 {
-			continue
-		}
-
-		pid, _ := strconv.Atoi(fields[1])
-		cpu, _ := strconv.ParseFloat(fields[2], 64)
-		mem, _ := strconv.ParseFloat(fields[3], 64)
-
-		// 计算内存MB数
-		memoryMB := (mem / 100) * totalMemGB * 1024
-
-		// 命令可能包含空格，从第11个字段开始拼接
-		command := strings.Join(fields[10:], " ")
-		if len(command) > 50 {
-			command = command[:50] + "..."
-		}
-
-		processes = append(processes, ProcessInfo{
-			PID:      pid,
-			Name:     fields[10],
-			CPU:      round(cpu, 1),
-			Memory:   round(mem, 1),
-			MemoryMB: round(memoryMB, 1),
-			Command:  command,
-		})
-		count++
-	}
-
-	return processes
-}
-
-// readSystemLogs 读取系统最新日志
-func readSystemLogs(count int) []string {
-	logs := []string{}
-
-	// 尝试使用 journalctl 读取系统日志
-	if _, err := exec.LookPath("journalctl"); err == nil {
-		cmd := exec.Command("journalctl", "-n", strconv.Itoa(count), "--no-pager", "-o", "short")
-		out, err := cmd.Output()
-		if err == nil {
-			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
-			for _, line := range lines {
-				if line != "" {
-					logs = append(logs, line)
-				}
-			}
-			return logs
-		}
-	}
-
-	// 如果 journalctl 不可用，尝试读取 /var/log/syslog 或 /var/log/messages
-	logFiles := []string{"/var/log/syslog", "/var/log/messages"}
-	for _, logFile := range logFiles {
-		f, err := os.Open(logFile)
-		if err != nil {
-			continue
-		}
-		defer f.Close()
-
-		// 读取最后几行
-		var lines []string
-		scanner := bufio.NewScanner(f)
-		for scanner.Scan() {
-			lines = append(lines, scanner.Text())
-		}
-
-		// 取最后count行
-		start := len(lines) - count
-		if start < 0 {
-			start = 0
-		}
-		logs = lines[start:]
-		break
-	}
-
-	return logs
-}
+package main
+
+import (
+	"bufio"
+	"context"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// readSystemStats 读取系统统计信息
+func readSystemStats() SystemStats {
+	stats := SystemStats{}
+
+	// 读取进程数量
+	stats.ProcessCount = countProcesses()
+	stats.LoggedInUsers = countLoggedInSessions()
+	stats.TCPConnections = countTCPConnectionsFromProc()
+
+	// 读取已安装包数量和包管理器类型
+	stats.PackageCount, stats.PackageManager = countPackages()
+
+	// 读取系统温度
+	stats.Temperature = readSystemTemperature()
+
+	// 读取磁盘读写速度
+	stats.DiskReadSpeed, stats.DiskWriteSpeed = readDiskSpeed()
+
+	// 读取 Top 10 进程
+	stats.TopProcesses = readTopProcesses()
+
+	// 读取系统日志
+	stats.SystemLogs = readSystemLogs(10)
+
+	return stats
+}
+
+func countProcesses() int {
+	entries, err := os.ReadDir("/proc")
+	if err != nil {
+		return 0
+	}
+	count := 0
+	for _, entry := range entries {
+		if entry.IsDir() {
+			// 进程目录是数字命名的
+			if _, err := strconv.Atoi(entry.Name()); err == nil {
+				count++
+			}
+		}
+	}
+	return count
+}
+
+// countLoggedInSessions 当前登录会话数（与 who 输出行数一致：多个 SSH/终端各占一行）
+func countLoggedInSessions() int {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "who")
+	out, err := cmd.Output()
+	if err != nil {
+		return 0
+	}
+	s := strings.TrimSpace(string(out))
+	if s == "" {
+		return 0
+	}
+	return len(strings.Split(s, "\n"))
+}
+
+// countTCPConnectionsFromProc 统计 /proc/net/tcp 与 tcp6 中的套接字条目数（内核导出的各行状态，非仅 ESTABLISHED）
+func countTCPConnectionsFromProc() int {
+	return countProcNetTCPFile("/proc/net/tcp") + countProcNetTCPFile("/proc/net/tcp6")
+}
+
+func countProcNetTCPFile(path string) int {
+	f, err := os.Open(path)
+	if err != nil {
+		return 0
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	n := 0
+	header := true
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" {
+			continue
+		}
+		if header {
+			header = false
+			continue
+		}
+		n++
+	}
+	return n
+}
+
+func countPackages() (int, string) {
+	// 尝试不同的包管理器
+	// dpkg (Debian/Ubuntu)
+	if _, err := exec.LookPath("dpkg"); err == nil {
+		cmd := exec.Command("dpkg", "-l")
+		out, err := cmd.Output()
+		if err == nil {
+			lines := strings.Split(string(out), "\n")
+			count := 0
+			for _, line := range lines {
+				if strings.HasPrefix(line, "ii ") {
+					count++
+				}
+			}
+			return count, "dpkg (apt)"
+		}
+	}
+
+	// rpm (RedHat/CentOS/Fedora)
+	if _, err := exec.LookPath("rpm"); err == nil {
+		cmd := exec.Command("rpm", "-qa")
+		out, err := cmd.Output()
+		if err == nil {
+			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
+			return len(lines), "rpm (yum/dnf)"
+		}
+	}
+
+	// pacman (Arch Linux)
+	if _, err := exec.LookPath("pacman"); err == nil {
+		cmd := exec.Command("pacman", "-Q")
+		out, err := cmd.Output()
+		if err == nil {
+			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
+			return len(lines), "pacman"
+		}
+	}
+
+	return 0, "unknown"
+}
+
+func readSystemTemperature() float64 {
+	var cpuTemp float64 = 0
+	var fallbackTemp float64 = 0
+
+	// 1. 优先读取 thermal_zone (通常是 CPU 温度)
+	thermalDir := "/sys/class/thermal"
+	entries, err := os.ReadDir(thermalDir)
+	if err == nil {
+		for _, entry := range entries {
+			if !strings.HasPrefix(entry.Name(), "thermal_zone") {
+				continue
+			}
+			tempPath := thermalDir + "/" + entry.Name() + "/temp"
+			if temp := readTempFromFile(tempPath); temp > 0 && temp > 20 && temp < 120 {
+				// thermal_zone0 通常是 CPU
+				if entry.Name() == "thermal_zone0" {
+					cpuTemp = temp
+					break
+				} else if fallbackTemp == 0 {
+					fallbackTemp = temp
+				}
+			}
+		}
+	}
+
+	// 2. 扫描所有 hwmon 设备，查找 CPU 温度
+	hwmonDir := "/sys/class/hwmon"
+	entries, err = os.ReadDir(hwmonDir)
+	if err == nil {
+		for _, entry := range entries {
+			hwmonPath := hwmonDir + "/" + entry.Name()
+
+			// 读取 name 文件，检查是否是 CPU 相关
+			namePath := hwmonPath + "/name"
+			name := strings.ToLower(strings.TrimSpace(readFirstLine(namePath)))
+
+			// 检查是否是 CPU 温度传感器
+			isCPU := strings.Contains(name, "cpu") ||
+				strings.Contains(name, "core") ||
+				strings.Contains(name, "k10temp") ||
+				strings.Contains(name, "coretemp") ||
+				strings.Contains(name, "zenpower")
+
+			// 尝试读取 temp1_input (通常是 CPU)
+			temp1Path := hwmonPath + "/temp1_input"
+			if temp := readTempFromFile(temp1Path); temp > 0 && temp > 20 && temp < 120 {
+				if isCPU {
+					cpuTemp = temp
+					break
+				} else if fallbackTemp == 0 {
+					fallbackTemp = temp
+				}
+			}
+
+			// 也尝试 temp2_input
+			temp2Path := hwmonPath + "/temp2_input"
+			if temp := readTempFromFile(temp2Path); temp > 0 && temp > 20 && temp < 120 {
+				if isCPU && cpuTemp == 0 {
+					cpuTemp = temp
+				} else if fallbackTemp == 0 {
+					fallbackTemp = temp
+				}
+			}
+		}
+	}
+
+	// 优先返回 CPU 温度，如果没有则返回其他温度
+	if cpuTemp > 0 {
+		return cpuTemp
+	}
+	return fallbackTemp
+}
+
+// readDiskSpeed 读取磁盘瞬时读写速度 (MB/s)
+func readDiskSpeed() (float64, float64) {
+	// 第一次读取
+	readSectors1, writeSectors1 := getDiskSectors()
+	if readSectors1 == 0 && writeSectors1 == 0 {
+		return 0, 0
+	}
+
+	// 等待1秒
+	time.Sleep(1 * time.Second)
+
+	// 第二次读取
+	readSectors2, writeSectors2 := getDiskSectors()
+
+	// 计算差值（扇区数）
+	readDiff := readSectors2 - readSectors1
+	writeDiff := writeSectors2 - writeSectors1
+
+	// 扇区大小通常是 512 字节，转换为 MB/s
+	readSpeed := float64(readDiff) * 512 / 1024 / 1024
+	writeSpeed := float64(writeDiff) * 512 / 1024 / 1024
+
+	return round(readSpeed, 2), round(writeSpeed, 2)
+}
+
+func getDiskSectors() (uint64, uint64) {
+	f, err := os.Open("/proc/diskstats")
+	if err != nil {
+		return 0, 0
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+
+	var maxRead uint64 = 0
+	var mainDevice string
+
+	// 第一次遍历：找到读写量最大的主磁盘（通常是系统盘）
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+		if len(fields) < 14 {
+			continue
+		}
+
+		deviceName := fields[2]
+		// 跳过分区（分区名通常包含数字，如 sda1, vda1, nvme0n1p1）
+		if strings.ContainsAny(deviceName, "0123456789") &&
+			!strings.HasPrefix(deviceName, "nvme") &&
+			!strings.HasPrefix(deviceName, "loop") {
+			continue
+		}
+
+		// 跳过虚拟设备
+		if strings.HasPrefix(deviceName, "loop") ||
+			strings.HasPrefix(deviceName, "ram") ||
+			strings.HasPrefix(deviceName, "zram") {
+			continue
+		}
+
+		readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
+		// 选择读写量最大的作为主磁盘
+		if readSectors > maxRead {
+			maxRead = readSectors
+			mainDevice = deviceName
+		}
+	}
+
+	// 第二次遍历：读取主磁盘的数据
+	f.Close()
+	f, err = os.Open("/proc/diskstats")
+	if err != nil {
+		return 0, 0
+	}
+	scanner = bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+		if len(fields) < 14 {
+			continue
+		}
+
+		if fields[2] == mainDevice {
+			readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
+			writeSectors, _ := strconv.ParseUint(fields[9], 10, 64)
+			return readSectors, writeSectors
+		}
+	}
+
+	// 如果没找到，尝试常见的设备名（向后兼容）
+	f.Close()
+	f, err = os.Open("/proc/diskstats")
+	if err != nil {
+		return 0, 0
+	}
+	scanner = bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+		if len(fields) < 14 {
+			continue
+		}
+
+		deviceName := fields[2]
+		if deviceName == "sda" || deviceName == "vda" || deviceName == "nvme0n1" {
+			readSectors, _ := strconv.ParseUint(fields[5], 10, 64)
+			writeSectors, _ := strconv.ParseUint(fields[9], 10, 64)
+			return readSectors, writeSectors
+		}
+	}
+
+	return 0, 0
+}
+
+// readTopProcesses 读取 Top 10 进程 (按 CPU 使用率)
+func readTopProcesses() []ProcessInfo {
+	processes := []ProcessInfo{}
+
+	// 读取系统总内存
+	memInfo, _ := readMemory()
+	totalMemGB := float64(memInfo.TotalBytes) / 1024 / 1024 / 1024
+
+	// 使用 ps 命令获取进程信息，添加超时控制
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "ps", "aux", "--sort=-%cpu", "--no-headers")
+	out, err := cmd.Output()
+	if err != nil {
+		return processes
+	}
+
+	lines := strings.Split(string(out), "\n")
+	count := 0
+
+	for _, line := range lines {
+		if count >= 10 { // 只取前 10 个
+			break
+		}
+
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+
+		fields := strings.Fields(line)
+		if len(fields) < 11 {
+			continue
+		}
+
+		pid, _ := strconv.Atoi(fields[1])
+		cpu, _ := strconv.ParseFloat(fields[2], 64)
+		mem, _ := strconv.ParseFloat(fields[3], 64)
+
+		// 计算内存MB数
+		memoryMB := (mem / 100) * totalMemGB * 1024
+
+		// 命令可能包含空格，从第11个字段开始拼接
+		command := strings.Join(fields[10:], " ")
+		if len(command) > 50 {
+			command = command[:50] + "..."
+		}
+
+		processes = append(processes, ProcessInfo{
+			PID:      pid,
+			Name:     fields[10],
+			CPU:      round(cpu, 1),
+			Memory:   round(mem, 1),
+			MemoryMB: round(memoryMB, 1),
+			Command:  command,
+		})
+		count++
+	}
+
+	return processes
+}
+
+// readSystemLogs 读取系统最新日志
+func readSystemLogs(count int) []string {
+	logs := []string{}
+
+	// 尝试使用 journalctl 读取系统日志
+	if _, err := exec.LookPath("journalctl"); err == nil {
+		cmd := exec.Command("journalctl", "-n", strconv.Itoa(count), "--no-pager", "-o", "short")
+		out, err := cmd.Output()
+		if err == nil {
+			lines := strings.Split(strings.TrimSpace(string(out)), "\n")
+			for _, line := range lines {
+				if line != "" {
+					logs = append(logs, line)
+				}
+			}
+			return logs
+		}
+	}
+
+	// 如果 journalctl 不可用，尝试读取 /var/log/syslog 或 /var/log/messages
+	logFiles := []string{"/var/log/syslog", "/var/log/messages"}
+	for _, logFile := range logFiles {
+		f, err := os.Open(logFile)
+		if err != nil {
+			continue
+		}
+		defer f.Close()
+
+		// 读取最后几行
+		var lines []string
+		scanner := bufio.NewScanner(f)
+		for scanner.Scan() {
+			lines = append(lines, scanner.Text())
+		}
+
+		// 取最后count行
+		start := len(lines) - count
+		if start < 0 {
+			start = 0
+		}
+		logs = lines[start:]
+		break
+	}
+
+	return logs
+}
diff --git a/mengyamonitor-backend/systeminfo_linux.go b/mengyamonitor-backend-client/systeminfo_linux.go
similarity index 100%
rename from mengyamonitor-backend/systeminfo_linux.go
rename to mengyamonitor-backend-client/systeminfo_linux.go
diff --git a/mengyamonitor-backend/systeminfo_other.go b/mengyamonitor-backend-client/systeminfo_other.go
similarity index 100%
rename from mengyamonitor-backend/systeminfo_other.go
rename to mengyamonitor-backend-client/systeminfo_other.go
diff --git a/mengyamonitor-backend/types.go b/mengyamonitor-backend-client/types.go
similarity index 73%
rename from mengyamonitor-backend/types.go
rename to mengyamonitor-backend-client/types.go
index c7a1885..2f67216 100644
--- a/mengyamonitor-backend/types.go
+++ b/mengyamonitor-backend-client/types.go
@@ -19,10 +19,15 @@ type CoreUsage struct {
 
 // 内存相关信息
 type MemoryMetrics struct {
-	TotalBytes  uint64  `json:"totalBytes"`
-	UsedBytes   uint64  `json:"usedBytes"`
-	FreeBytes   uint64  `json:"freeBytes"`
-	UsedPercent float64 `json:"usedPercent"`
+	TotalBytes      uint64  `json:"totalBytes"`
+	UsedBytes       uint64  `json:"usedBytes"`
+	FreeBytes       uint64  `json:"freeBytes"`
+	UsedPercent     float64 `json:"usedPercent"`
+	SwapTotalBytes  uint64  `json:"swapTotalBytes"`
+	SwapUsedBytes   uint64  `json:"swapUsedBytes"`
+	SwapFreeBytes   uint64  `json:"swapFreeBytes"`
+	SwapUsedPercent float64 `json:"swapUsedPercent"`
+	SwapType        string  `json:"swapType"` // /proc/swaps 类型汇总，如 file、partition、zram；无交换分区时为「无」
 }
 
 // 储存相关信息
@@ -58,6 +63,8 @@ type NetworkInterface struct {
 // 系统状态相关信息
 type SystemStats struct {
 	ProcessCount   int           `json:"processCount"`          // 进程数量
+	LoggedInUsers  int           `json:"loggedInUsers"`         // 当前登录会话数（who 行数，与 ssh/tty 会话对应）
+	TCPConnections int           `json:"tcpConnections"`        // IPv4+IPv6 套接字行数（/proc/net/tcp + tcp6，含各状态）
 	PackageCount   int           `json:"packageCount"`          // 已安装软件包数量
 	PackageManager string        `json:"packageManager"`        // 包管理器类型
 	Temperature    float64       `json:"temperature,omitempty"` // 系统温度(摄氏度)
@@ -65,7 +72,7 @@ type SystemStats struct {
 	DiskWriteSpeed float64       `json:"diskWriteSpeed"`        // 磁盘写入速度 MB/s
 	NetworkRxSpeed float64       `json:"networkRxSpeed"`        // 网络下载速度 MB/s
 	NetworkTxSpeed float64       `json:"networkTxSpeed"`        // 网络上传速度 MB/s
-	TopProcesses   []ProcessInfo `json:"topProcesses"`          // Top 5 进程
+	TopProcesses   []ProcessInfo `json:"topProcesses"`          // Top 10 进程
 	DockerStats    DockerStats   `json:"dockerStats"`           // Docker 统计信息
 	SystemLogs     []string      `json:"systemLogs"`            // 系统最新日志
 }
@@ -82,14 +89,14 @@ type ProcessInfo struct {
 
 // Docker相关信息（简化版）
 type DockerStats struct {
-	Available      bool     `json:"available"`      // Docker是否可用
-	Version        string   `json:"version"`       // Docker版本
-	Running        int       `json:"running"`       // 运行中的容器数
-	Stopped        int       `json:"stopped"`       // 停止的容器数
-	ImageCount     int       `json:"imageCount"`    // 镜像数量
-	RunningNames   []string  `json:"runningNames"`  // 运行中的容器名列表
-	StoppedNames   []string  `json:"stoppedNames"`  // 停止的容器名列表
-	ImageNames     []string  `json:"imageNames"`    // 镜像名列表
+	Available    bool     `json:"available"`    // Docker是否可用
+	Version      string   `json:"version"`      // Docker版本
+	Running      int      `json:"running"`      // 运行中的容器数
+	Stopped      int      `json:"stopped"`      // 停止的容器数
+	ImageCount   int      `json:"imageCount"`   // 镜像数量
+	RunningNames []string `json:"runningNames"` // 运行中的容器名列表
+	StoppedNames []string `json:"stoppedNames"` // 停止的容器名列表
+	ImageNames   []string `json:"imageNames"`   // 镜像名列表
 }
 
 // 操作系统相关信息
diff --git a/mengyamonitor-backend/utils.go b/mengyamonitor-backend-client/utils.go
similarity index 100%
rename from mengyamonitor-backend/utils.go
rename to mengyamonitor-backend-client/utils.go
diff --git a/mengyamonitor-backend-server/.dockerignore b/mengyamonitor-backend-server/.dockerignore
new file mode 100644
index 0000000..80678f2
--- /dev/null
+++ b/mengyamonitor-backend-server/.dockerignore
@@ -0,0 +1,9 @@
+data/
+.git
+.gitignore
+*.md
+.env
+.env.*
+*.exe
+mengyamonitor-backend-server
+__debug_bin
diff --git a/mengyamonitor-backend-server/Dockerfile b/mengyamonitor-backend-server/Dockerfile
new file mode 100644
index 0000000..2e78b41
--- /dev/null
+++ b/mengyamonitor-backend-server/Dockerfile
@@ -0,0 +1,21 @@
+# 中心服务：HTTP/WebSocket + gRPC（纯 Go / modernc SQLite，CGO_ENABLED=0）
+# 镜像内进程为明文 HTTP；HTTPS 请在宿主机 Nginx 等反代层配置，内网直连本端口即可。
+FROM golang:1.22-alpine AS build
+WORKDIR /src
+RUN apk add --no-cache git
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /central .
+
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+# 与 config 默认一致； compose 中可覆盖
+ENV HOST=0.0.0.0
+ENV PORT=9393
+ENV GRPC_PORT=9394
+ENV DB_PATH=/app/data/servers.db
+COPY --from=build /central /app/central
+EXPOSE 9393 9394
+ENTRYPOINT ["/app/central"]
diff --git a/mengyamonitor-backend-server/Dockerfile.binary b/mengyamonitor-backend-server/Dockerfile.binary
new file mode 100644
index 0000000..a38d22d
--- /dev/null
+++ b/mengyamonitor-backend-server/Dockerfile.binary
@@ -0,0 +1,13 @@
+# 使用本机/CI 已编译好的 Linux amd64 二进制打包镜像（不在 Docker 内 go build）
+# 先执行: build-linux-amd64.bat 或 release 目录放置同名文件
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+ENV HOST=0.0.0.0
+ENV PORT=9393
+ENV GRPC_PORT=9394
+ENV DB_PATH=/app/data/servers.db
+COPY release/mengyamonitor-central-linux-amd64 /app/central
+RUN chmod +x /app/central
+EXPOSE 9393 9394
+ENTRYPOINT ["/app/central"]
diff --git a/mengyamonitor-backend-server/build-linux-amd64.bat b/mengyamonitor-backend-server/build-linux-amd64.bat
new file mode 100644
index 0000000..efa36a0
--- /dev/null
+++ b/mengyamonitor-backend-server/build-linux-amd64.bat
@@ -0,0 +1,28 @@
+@echo off
+setlocal
+cd /d "%~dp0"
+
+where go >nul 2>&1
+if errorlevel 1 (
+    echo [错误] 未找到 go，请先安装 Go 并加入 PATH
+    exit /b 1
+)
+
+if not exist release mkdir release
+
+set GOOS=linux
+set GOARCH=amd64
+set CGO_ENABLED=0
+
+echo 正在编译 Linux amd64 release\mengyamonitor-central-linux-amd64 ...
+go build -trimpath -ldflags="-s -w" -o release\mengyamonitor-central-linux-amd64 .
+if errorlevel 1 (
+    echo [错误] go build 失败
+    exit /b 1
+)
+
+echo 完成: %cd%\release\mengyamonitor-central-linux-amd64
+echo.
+echo 可选：用预编译镜像启动（不再在 Docker 里编译）
+echo   docker compose -f docker-compose.binary.yml up -d --build
+exit /b 0
diff --git a/mengyamonitor-backend-server/docker-compose.binary.yml b/mengyamonitor-backend-server/docker-compose.binary.yml
new file mode 100644
index 0000000..acbf195
--- /dev/null
+++ b/mengyamonitor-backend-server/docker-compose.binary.yml
@@ -0,0 +1,20 @@
+# 使用 release/mengyamonitor-central-linux-amd64 打包镜像（先在 Windows 运行 build-linux-amd64.bat）
+# 容器内仍是 HTTP:9393 / 9394；HTTPS 仅公网 Nginx 反代层
+services:
+  central:
+    build:
+      context: .
+      dockerfile: Dockerfile.binary
+    image: mengyamonitor-central:latest
+    restart: unless-stopped
+    ports:
+      - "9393:9393"
+      - "9394:9394"
+    environment:
+      HOST: "0.0.0.0"
+      PORT: "9393"
+      GRPC_PORT: "9394"
+      ADMIN_TOKEN: ${ADMIN_TOKEN:-shumengya520}
+      DB_PATH: /app/data/servers.db
+    volumes:
+      - ./data:/app/data
diff --git a/mengyamonitor-backend-server/docker-compose.yml b/mengyamonitor-backend-server/docker-compose.yml
new file mode 100644
index 0000000..74a161b
--- /dev/null
+++ b/mengyamonitor-backend-server/docker-compose.yml
@@ -0,0 +1,23 @@
+# 中心服务在容器内仅为 HTTP（9393 Web/WS、9394 gRPC）；TLS 由公网 Nginx 做，与内网无关。
+#
+# 本文件：在 Docker 内完整执行 go build（适合无本机 Go 或 CI）。
+# 若已在 Windows 编好 Linux 二进制，避免镜像内再编译：先运行 build-linux-amd64.bat，再
+#   docker compose -f docker-compose.binary.yml up -d --build
+services:
+  central:
+    build: .
+    image: mengyamonitor-central:latest
+    restart: unless-stopped
+    ports:
+      # 宿主:容器 —— 可按需改为 "127.0.0.1:9393:9393" 仅本机反代
+      - "9393:9393"
+      - "9394:9394"
+    environment:
+      HOST: "0.0.0.0"
+      PORT: "9393"
+      GRPC_PORT: "9394"
+      # 务必在宿主设置强口令：export ADMIN_TOKEN=... 或下方 env_file
+      ADMIN_TOKEN: ${ADMIN_TOKEN:-shumengya520}
+      DB_PATH: /app/data/servers.db
+    volumes:
+      - ./data:/app/data
diff --git a/mengyamonitor-backend-server/go.mod b/mengyamonitor-backend-server/go.mod
new file mode 100644
index 0000000..1eef026
--- /dev/null
+++ b/mengyamonitor-backend-server/go.mod
@@ -0,0 +1,47 @@
+module mengyamonitor-backend-server
+
+go 1.22
+
+require (
+	github.com/gin-gonic/gin v1.10.0
+	github.com/google/uuid v1.6.0
+	github.com/gorilla/websocket v1.5.3
+	google.golang.org/grpc v1.70.0
+	google.golang.org/protobuf v1.35.2
+	modernc.org/sqlite v1.34.5
+)
+
+require (
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.30.0 // indirect
+	golang.org/x/net v0.32.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	modernc.org/libc v1.55.3 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.8.0 // indirect
+)
diff --git a/mengyamonitor-backend-server/go.sum b/mengyamonitor-backend-server/go.sum
new file mode 100644
index 0000000..513e622
--- /dev/null
+++ b/mengyamonitor-backend-server/go.sum
@@ -0,0 +1,149 @@
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diff --git a/mengyamonitor-backend-server/internal/config/config.go b/mengyamonitor-backend-server/internal/config/config.go
new file mode 100644
index 0000000..3d8623a
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/config/config.go
@@ -0,0 +1,30 @@
+package config
+
+import (
+	"os"
+)
+
+type Config struct {
+	Host       string
+	Port       string
+	GRPCPort   string
+	AdminToken string
+	DBPath     string
+}
+
+func Load() *Config {
+	return &Config{
+		Host:       getenv("HOST", "0.0.0.0"),
+		Port:       getenv("PORT", "9393"),
+		GRPCPort:   getenv("GRPC_PORT", "9394"),
+		AdminToken: getenv("ADMIN_TOKEN", "shumengya520"),
+		DBPath:     getenv("DB_PATH", "./data/servers.db"),
+	}
+}
+
+func getenv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}
diff --git a/mengyamonitor-backend-server/internal/gen/mengyav1/agent.pb.go b/mengyamonitor-backend-server/internal/gen/mengyav1/agent.pb.go
new file mode 100644
index 0000000..13b78e8
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/gen/mengyav1/agent.pb.go
@@ -0,0 +1,492 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.5
+// 	protoc        v5.28.3
+// source: mengya/v1/agent.proto
+
+package mengyav1
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type AgentMessage struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Payload:
+	//
+	//	*AgentMessage_Hello
+	//	*AgentMessage_Heartbeat
+	//	*AgentMessage_Metrics
+	Payload       isAgentMessage_Payload `protobuf_oneof:"payload"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *AgentMessage) Reset() {
+	*x = AgentMessage{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AgentMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AgentMessage) ProtoMessage() {}
+
+func (x *AgentMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AgentMessage.ProtoReflect.Descriptor instead.
+func (*AgentMessage) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *AgentMessage) GetPayload() isAgentMessage_Payload {
+	if x != nil {
+		return x.Payload
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetHello() *Hello {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Hello); ok {
+			return x.Hello
+		}
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetHeartbeat() *Heartbeat {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Heartbeat); ok {
+			return x.Heartbeat
+		}
+	}
+	return nil
+}
+
+func (x *AgentMessage) GetMetrics() *MetricsReport {
+	if x != nil {
+		if x, ok := x.Payload.(*AgentMessage_Metrics); ok {
+			return x.Metrics
+		}
+	}
+	return nil
+}
+
+type isAgentMessage_Payload interface {
+	isAgentMessage_Payload()
+}
+
+type AgentMessage_Hello struct {
+	Hello *Hello `protobuf:"bytes,1,opt,name=hello,proto3,oneof"`
+}
+
+type AgentMessage_Heartbeat struct {
+	Heartbeat *Heartbeat `protobuf:"bytes,2,opt,name=heartbeat,proto3,oneof"`
+}
+
+type AgentMessage_Metrics struct {
+	Metrics *MetricsReport `protobuf:"bytes,3,opt,name=metrics,proto3,oneof"`
+}
+
+func (*AgentMessage_Hello) isAgentMessage_Payload() {}
+
+func (*AgentMessage_Heartbeat) isAgentMessage_Payload() {}
+
+func (*AgentMessage_Metrics) isAgentMessage_Payload() {}
+
+type Hello struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	ServerId      string                 `protobuf:"bytes,1,opt,name=server_id,json=serverId,proto3" json:"server_id,omitempty"`
+	AgentKey      string                 `protobuf:"bytes,2,opt,name=agent_key,json=agentKey,proto3" json:"agent_key,omitempty"`
+	Hostname      string                 `protobuf:"bytes,3,opt,name=hostname,proto3" json:"hostname,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Hello) Reset() {
+	*x = Hello{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Hello) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Hello) ProtoMessage() {}
+
+func (x *Hello) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Hello.ProtoReflect.Descriptor instead.
+func (*Hello) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Hello) GetServerId() string {
+	if x != nil {
+		return x.ServerId
+	}
+	return ""
+}
+
+func (x *Hello) GetAgentKey() string {
+	if x != nil {
+		return x.AgentKey
+	}
+	return ""
+}
+
+func (x *Hello) GetHostname() string {
+	if x != nil {
+		return x.Hostname
+	}
+	return ""
+}
+
+type Heartbeat struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Heartbeat) Reset() {
+	*x = Heartbeat{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Heartbeat) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Heartbeat) ProtoMessage() {}
+
+func (x *Heartbeat) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Heartbeat.ProtoReflect.Descriptor instead.
+func (*Heartbeat) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{2}
+}
+
+type MetricsReport struct {
+	state             protoimpl.MessageState `protogen:"open.v1"`
+	PayloadJson       string                 `protobuf:"bytes,1,opt,name=payload_json,json=payloadJson,proto3" json:"payload_json,omitempty"`
+	CollectedAtUnixMs int64                  `protobuf:"varint,2,opt,name=collected_at_unix_ms,json=collectedAtUnixMs,proto3" json:"collected_at_unix_ms,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
+}
+
+func (x *MetricsReport) Reset() {
+	*x = MetricsReport{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *MetricsReport) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MetricsReport) ProtoMessage() {}
+
+func (x *MetricsReport) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MetricsReport.ProtoReflect.Descriptor instead.
+func (*MetricsReport) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *MetricsReport) GetPayloadJson() string {
+	if x != nil {
+		return x.PayloadJson
+	}
+	return ""
+}
+
+func (x *MetricsReport) GetCollectedAtUnixMs() int64 {
+	if x != nil {
+		return x.CollectedAtUnixMs
+	}
+	return 0
+}
+
+type ControlMessage struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Payload:
+	//
+	//	*ControlMessage_Ack
+	Payload       isControlMessage_Payload `protobuf_oneof:"payload"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ControlMessage) Reset() {
+	*x = ControlMessage{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ControlMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ControlMessage) ProtoMessage() {}
+
+func (x *ControlMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[4]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ControlMessage.ProtoReflect.Descriptor instead.
+func (*ControlMessage) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *ControlMessage) GetPayload() isControlMessage_Payload {
+	if x != nil {
+		return x.Payload
+	}
+	return nil
+}
+
+func (x *ControlMessage) GetAck() *Ack {
+	if x != nil {
+		if x, ok := x.Payload.(*ControlMessage_Ack); ok {
+			return x.Ack
+		}
+	}
+	return nil
+}
+
+type isControlMessage_Payload interface {
+	isControlMessage_Payload()
+}
+
+type ControlMessage_Ack struct {
+	Ack *Ack `protobuf:"bytes,1,opt,name=ack,proto3,oneof"`
+}
+
+func (*ControlMessage_Ack) isControlMessage_Payload() {}
+
+type Ack struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Message       string                 `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Ack) Reset() {
+	*x = Ack{}
+	mi := &file_mengya_v1_agent_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Ack) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Ack) ProtoMessage() {}
+
+func (x *Ack) ProtoReflect() protoreflect.Message {
+	mi := &file_mengya_v1_agent_proto_msgTypes[5]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Ack.ProtoReflect.Descriptor instead.
+func (*Ack) Descriptor() ([]byte, []int) {
+	return file_mengya_v1_agent_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *Ack) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_mengya_v1_agent_proto protoreflect.FileDescriptor
+
+var file_mengya_v1_agent_proto_rawDesc = string([]byte{
+	0x0a, 0x15, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2f, 0x76, 0x31, 0x2f, 0x61, 0x67, 0x65, 0x6e,
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+	0x74, 0x12, 0x21, 0x0a, 0x0c, 0x70, 0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x5f, 0x6a, 0x73, 0x6f,
+	0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x70, 0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64,
+	0x4a, 0x73, 0x6f, 0x6e, 0x12, 0x2f, 0x0a, 0x14, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x65,
+	0x64, 0x5f, 0x61, 0x74, 0x5f, 0x75, 0x6e, 0x69, 0x78, 0x5f, 0x6d, 0x73, 0x18, 0x02, 0x20, 0x01,
+	0x28, 0x03, 0x52, 0x11, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x65, 0x64, 0x41, 0x74, 0x55,
+	0x6e, 0x69, 0x78, 0x4d, 0x73, 0x22, 0x3f, 0x0a, 0x0e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c,
+	0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x22, 0x0a, 0x03, 0x61, 0x63, 0x6b, 0x18, 0x01,
+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x0e, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31,
+	0x2e, 0x41, 0x63, 0x6b, 0x48, 0x00, 0x52, 0x03, 0x61, 0x63, 0x6b, 0x42, 0x09, 0x0a, 0x07, 0x70,
+	0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x22, 0x1f, 0x0a, 0x03, 0x41, 0x63, 0x6b, 0x12, 0x18, 0x0a,
+	0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07,
+	0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x32, 0x50, 0x0a, 0x0b, 0x41, 0x67, 0x65, 0x6e, 0x74,
+	0x49, 0x6e, 0x67, 0x65, 0x73, 0x74, 0x12, 0x41, 0x0a, 0x07, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63,
+	0x74, 0x12, 0x17, 0x2e, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x41, 0x67,
+	0x65, 0x6e, 0x74, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x1a, 0x19, 0x2e, 0x6d, 0x65, 0x6e,
+	0x67, 0x79, 0x61, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x4d, 0x65,
+	0x73, 0x73, 0x61, 0x67, 0x65, 0x28, 0x01, 0x30, 0x01, 0x42, 0x3d, 0x5a, 0x3b, 0x6d, 0x65, 0x6e,
+	0x67, 0x79, 0x61, 0x6d, 0x6f, 0x6e, 0x69, 0x74, 0x6f, 0x72, 0x2d, 0x62, 0x61, 0x63, 0x6b, 0x65,
+	0x6e, 0x64, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
+	0x61, 0x6c, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x76, 0x31, 0x3b,
+	0x6d, 0x65, 0x6e, 0x67, 0x79, 0x61, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+})
+
+var (
+	file_mengya_v1_agent_proto_rawDescOnce sync.Once
+	file_mengya_v1_agent_proto_rawDescData []byte
+)
+
+func file_mengya_v1_agent_proto_rawDescGZIP() []byte {
+	file_mengya_v1_agent_proto_rawDescOnce.Do(func() {
+		file_mengya_v1_agent_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_mengya_v1_agent_proto_rawDesc), len(file_mengya_v1_agent_proto_rawDesc)))
+	})
+	return file_mengya_v1_agent_proto_rawDescData
+}
+
+var file_mengya_v1_agent_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_mengya_v1_agent_proto_goTypes = []any{
+	(*AgentMessage)(nil),   // 0: mengya.v1.AgentMessage
+	(*Hello)(nil),          // 1: mengya.v1.Hello
+	(*Heartbeat)(nil),      // 2: mengya.v1.Heartbeat
+	(*MetricsReport)(nil),  // 3: mengya.v1.MetricsReport
+	(*ControlMessage)(nil), // 4: mengya.v1.ControlMessage
+	(*Ack)(nil),            // 5: mengya.v1.Ack
+}
+var file_mengya_v1_agent_proto_depIdxs = []int32{
+	1, // 0: mengya.v1.AgentMessage.hello:type_name -> mengya.v1.Hello
+	2, // 1: mengya.v1.AgentMessage.heartbeat:type_name -> mengya.v1.Heartbeat
+	3, // 2: mengya.v1.AgentMessage.metrics:type_name -> mengya.v1.MetricsReport
+	5, // 3: mengya.v1.ControlMessage.ack:type_name -> mengya.v1.Ack
+	0, // 4: mengya.v1.AgentIngest.Connect:input_type -> mengya.v1.AgentMessage
+	4, // 5: mengya.v1.AgentIngest.Connect:output_type -> mengya.v1.ControlMessage
+	5, // [5:6] is the sub-list for method output_type
+	4, // [4:5] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
+}
+
+func init() { file_mengya_v1_agent_proto_init() }
+func file_mengya_v1_agent_proto_init() {
+	if File_mengya_v1_agent_proto != nil {
+		return
+	}
+	file_mengya_v1_agent_proto_msgTypes[0].OneofWrappers = []any{
+		(*AgentMessage_Hello)(nil),
+		(*AgentMessage_Heartbeat)(nil),
+		(*AgentMessage_Metrics)(nil),
+	}
+	file_mengya_v1_agent_proto_msgTypes[4].OneofWrappers = []any{
+		(*ControlMessage_Ack)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_mengya_v1_agent_proto_rawDesc), len(file_mengya_v1_agent_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   6,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_mengya_v1_agent_proto_goTypes,
+		DependencyIndexes: file_mengya_v1_agent_proto_depIdxs,
+		MessageInfos:      file_mengya_v1_agent_proto_msgTypes,
+	}.Build()
+	File_mengya_v1_agent_proto = out.File
+	file_mengya_v1_agent_proto_goTypes = nil
+	file_mengya_v1_agent_proto_depIdxs = nil
+}
diff --git a/mengyamonitor-backend-server/internal/gen/mengyav1/agent_grpc.pb.go b/mengyamonitor-backend-server/internal/gen/mengyav1/agent_grpc.pb.go
new file mode 100644
index 0000000..d5aa41a
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/gen/mengyav1/agent_grpc.pb.go
@@ -0,0 +1,119 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.28.3
+// source: mengya/v1/agent.proto
+
+package mengyav1
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	AgentIngest_Connect_FullMethodName = "/mengya.v1.AgentIngest/Connect"
+)
+
+// AgentIngestClient is the client API for AgentIngest service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+//
+// AgentIngest: 采集端出站连接，双向流上报指标。
+type AgentIngestClient interface {
+	Connect(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[AgentMessage, ControlMessage], error)
+}
+
+type agentIngestClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAgentIngestClient(cc grpc.ClientConnInterface) AgentIngestClient {
+	return &agentIngestClient{cc}
+}
+
+func (c *agentIngestClient) Connect(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[AgentMessage, ControlMessage], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &AgentIngest_ServiceDesc.Streams[0], AgentIngest_Connect_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[AgentMessage, ControlMessage]{ClientStream: stream}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type AgentIngest_ConnectClient = grpc.BidiStreamingClient[AgentMessage, ControlMessage]
+
+// AgentIngestServer is the server API for AgentIngest service.
+// All implementations must embed UnimplementedAgentIngestServer
+// for forward compatibility.
+//
+// AgentIngest: 采集端出站连接，双向流上报指标。
+type AgentIngestServer interface {
+	Connect(grpc.BidiStreamingServer[AgentMessage, ControlMessage]) error
+	mustEmbedUnimplementedAgentIngestServer()
+}
+
+// UnimplementedAgentIngestServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedAgentIngestServer struct{}
+
+func (UnimplementedAgentIngestServer) Connect(grpc.BidiStreamingServer[AgentMessage, ControlMessage]) error {
+	return status.Errorf(codes.Unimplemented, "method Connect not implemented")
+}
+func (UnimplementedAgentIngestServer) mustEmbedUnimplementedAgentIngestServer() {}
+func (UnimplementedAgentIngestServer) testEmbeddedByValue()                     {}
+
+// UnsafeAgentIngestServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to AgentIngestServer will
+// result in compilation errors.
+type UnsafeAgentIngestServer interface {
+	mustEmbedUnimplementedAgentIngestServer()
+}
+
+func RegisterAgentIngestServer(s grpc.ServiceRegistrar, srv AgentIngestServer) {
+	// If the following call pancis, it indicates UnimplementedAgentIngestServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&AgentIngest_ServiceDesc, srv)
+}
+
+func _AgentIngest_Connect_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(AgentIngestServer).Connect(&grpc.GenericServerStream[AgentMessage, ControlMessage]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type AgentIngest_ConnectServer = grpc.BidiStreamingServer[AgentMessage, ControlMessage]
+
+// AgentIngest_ServiceDesc is the grpc.ServiceDesc for AgentIngest service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var AgentIngest_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "mengya.v1.AgentIngest",
+	HandlerType: (*AgentIngestServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Connect",
+			Handler:       _AgentIngest_Connect_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "mengya/v1/agent.proto",
+}
diff --git a/mengyamonitor-backend-server/internal/grpcrun/grpcrun.go b/mengyamonitor-backend-server/internal/grpcrun/grpcrun.go
new file mode 100644
index 0000000..0c0c13f
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/grpcrun/grpcrun.go
@@ -0,0 +1,22 @@
+package grpcrun
+
+import (
+	"fmt"
+	"net"
+
+	"mengyamonitor-backend-server/internal/gen/mengyav1"
+	"mengyamonitor-backend-server/internal/ingest"
+
+	"google.golang.org/grpc"
+)
+
+// Serve starts a blocking gRPC server for agent ingest.
+func Serve(listenAddr string, srv *ingest.Server) error {
+	lis, err := net.Listen("tcp", listenAddr)
+	if err != nil {
+		return fmt.Errorf("listen: %w", err)
+	}
+	g := grpc.NewServer()
+	mengyav1.RegisterAgentIngestServer(g, srv)
+	return g.Serve(lis)
+}
diff --git a/mengyamonitor-backend-server/internal/handler/admin.go b/mengyamonitor-backend-server/internal/handler/admin.go
new file mode 100644
index 0000000..a301fdc
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/handler/admin.go
@@ -0,0 +1,100 @@
+package handler
+
+import (
+	"crypto/subtle"
+	"database/sql"
+	"errors"
+	"net/http"
+
+	"mengyamonitor-backend-server/internal/config"
+	"mengyamonitor-backend-server/internal/model"
+	"mengyamonitor-backend-server/internal/store"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Admin struct {
+	Store *store.Store
+	Cfg   *config.Config
+}
+
+func (h *Admin) Auth(c *gin.Context) {
+	var in model.AuthInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid body"})
+		return
+	}
+	if subtle.ConstantTimeCompare([]byte(in.Token), []byte(h.Cfg.AdminToken)) != 1 {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
+func (h *Admin) ListServers(c *gin.Context) {
+	list, err := h.Store.ListAll(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": list})
+}
+
+func (h *Admin) CreateServer(c *gin.Context) {
+	var in model.CreateServerInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid body"})
+		return
+	}
+	s, err := h.Store.Create(c.Request.Context(), in)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusCreated, gin.H{"data": s})
+}
+
+func (h *Admin) UpdateServer(c *gin.Context) {
+	id := c.Param("id")
+	var in model.UpdateServerInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid body"})
+		return
+	}
+	s, err := h.Store.Update(c.Request.Context(), id, in)
+	if errors.Is(err, sql.ErrNoRows) {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": s})
+}
+
+func (h *Admin) DeleteServer(c *gin.Context) {
+	id := c.Param("id")
+	if err := h.Store.Delete(c.Request.Context(), id); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
+func (h *Admin) Reorder(c *gin.Context) {
+	var in model.ReorderInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid body"})
+		return
+	}
+	if err := h.Store.Reorder(c.Request.Context(), in.IDs); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
diff --git a/mengyamonitor-backend-server/internal/handler/public.go b/mengyamonitor-backend-server/internal/handler/public.go
new file mode 100644
index 0000000..e1bc0c4
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/handler/public.go
@@ -0,0 +1,70 @@
+package handler
+
+import (
+	"net/http"
+	"time"
+
+	"mengyamonitor-backend-server/internal/model"
+	"mengyamonitor-backend-server/internal/store"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Public struct {
+	Store *store.Store
+}
+
+// publicServer hides agent_key from unauthenticated API consumers.
+type publicServer struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	URL       string    `json:"url"`
+	Enabled   bool      `json:"enabled"`
+	SortOrder int       `json:"sortOrder"`
+	CreatedAt time.Time `json:"createdAt,omitempty"`
+}
+
+func toPublicServers(in []model.MonitoredServer) []publicServer {
+	out := make([]publicServer, 0, len(in))
+	for _, s := range in {
+		out = append(out, publicServer{
+			ID: s.ID, Name: s.Name, URL: s.URL, Enabled: s.Enabled,
+			SortOrder: s.SortOrder, CreatedAt: s.CreatedAt,
+		})
+	}
+	return out
+}
+
+func (h *Public) Health(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{"status": "ok"})
+}
+
+func (h *Public) ListServers(c *gin.Context) {
+	list, err := h.Store.ListEnabled(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": toPublicServers(list)})
+}
+
+func (h *Public) Root(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"service": "萌芽监控 — 中心服务",
+		"version": "1.0.0",
+		"public": []string{
+			"GET /api/health",
+			"GET /api/servers",
+			"GET /api/ws/monitor — WebSocket 指标快照",
+			"gRPC AgentIngest — 见环境变量 GRPC_PORT",
+		},
+		"admin": []string{
+			"POST /api/admin/auth",
+			"GET /api/admin/servers",
+			"POST /api/admin/servers",
+			"PUT /api/admin/servers/:id",
+			"DELETE /api/admin/servers/:id",
+			"PUT /api/admin/servers/reorder",
+		},
+	})
+}
diff --git a/mengyamonitor-backend-server/internal/handler/ws.go b/mengyamonitor-backend-server/internal/handler/ws.go
new file mode 100644
index 0000000..fcf92db
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/handler/ws.go
@@ -0,0 +1,50 @@
+package handler
+
+import (
+	"log"
+	"net/http"
+	"time"
+
+	"mengyamonitor-backend-server/internal/hub"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gorilla/websocket"
+)
+
+var wsUpgrader = websocket.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 1024,
+	CheckOrigin: func(r *http.Request) bool {
+		return true
+	},
+}
+
+// MonitorWebSocket upgrades to WebSocket and streams hub snapshots.
+func MonitorWebSocket(h *hub.Hub) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		conn, err := wsUpgrader.Upgrade(c.Writer, c.Request, nil)
+		if err != nil {
+			log.Printf("ws: upgrade: %v", err)
+			return
+		}
+		defer h.Unregister(conn)
+		snap, err := h.BuildSnapshotMessage()
+		if err != nil {
+			_ = conn.Close()
+			return
+		}
+		_ = conn.SetWriteDeadline(time.Now().Add(15 * time.Second))
+		if err := conn.WriteMessage(websocket.TextMessage, snap); err != nil {
+			_ = conn.Close()
+			return
+		}
+		h.AddSubscriber(conn)
+		for {
+			_ = conn.SetReadDeadline(time.Now().Add(120 * time.Second))
+			_, _, err := conn.ReadMessage()
+			if err != nil {
+				break
+			}
+		}
+	}
+}
diff --git a/mengyamonitor-backend-server/internal/hub/hub.go b/mengyamonitor-backend-server/internal/hub/hub.go
new file mode 100644
index 0000000..94c33cb
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/hub/hub.go
@@ -0,0 +1,108 @@
+package hub
+
+import (
+	"encoding/json"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+// WSMessage is sent to browsers (matches frontend ServerStatus shape).
+type WSMessage struct {
+	Type string                       `json:"type"`
+	Data map[string]json.RawMessage `json:"data"`
+}
+
+type Hub struct {
+	mu sync.RWMutex
+	// serverId -> latest metrics JSON object (not wrapped)
+	metrics map[string]json.RawMessage
+
+	subsMu sync.Mutex
+	// subscribers for broadcast
+	conns map[*websocket.Conn]struct{}
+}
+
+func New() *Hub {
+	return &Hub{
+		metrics: make(map[string]json.RawMessage),
+		conns:   make(map[*websocket.Conn]struct{}),
+	}
+}
+
+func (h *Hub) SetMetrics(serverID string, metricsJSON []byte) {
+	h.mu.Lock()
+	if len(metricsJSON) == 0 {
+		delete(h.metrics, serverID)
+	} else {
+		h.metrics[serverID] = json.RawMessage(append([]byte(nil), metricsJSON...))
+	}
+	h.mu.Unlock()
+}
+
+func (h *Hub) snapshotData() map[string]json.RawMessage {
+	h.mu.RLock()
+	defer h.mu.RUnlock()
+	out := make(map[string]json.RawMessage, len(h.metrics))
+	now := time.Now().UnixMilli()
+	for id, raw := range h.metrics {
+		// Wrap as ServerStatus for frontend compatibility
+		wrap := map[string]any{
+			"serverId":   id,
+			"online":     true,
+			"metrics":    json.RawMessage(raw),
+			"lastUpdate": now,
+		}
+		b, err := json.Marshal(wrap)
+		if err != nil {
+			continue
+		}
+		out[id] = b
+	}
+	return out
+}
+
+func (h *Hub) BuildSnapshotMessage() ([]byte, error) {
+	msg := WSMessage{
+		Type: "snapshot",
+		Data: h.snapshotData(),
+	}
+	return json.Marshal(msg)
+}
+
+// AddSubscriber registers for broadcast fan-out (call after sending the initial snapshot).
+func (h *Hub) AddSubscriber(c *websocket.Conn) {
+	h.subsMu.Lock()
+	h.conns[c] = struct{}{}
+	h.subsMu.Unlock()
+}
+
+func (h *Hub) Unregister(c *websocket.Conn) {
+	h.subsMu.Lock()
+	delete(h.conns, c)
+	h.subsMu.Unlock()
+}
+
+// BroadcastSnapshot pushes full snapshot to all subscribers.
+func (h *Hub) BroadcastSnapshot() {
+	body, err := h.BuildSnapshotMessage()
+	if err != nil {
+		return
+	}
+	h.subsMu.Lock()
+	defer h.subsMu.Unlock()
+	for c := range h.conns {
+		_ = c.SetWriteDeadline(time.Now().Add(10 * time.Second))
+		if err := c.WriteMessage(websocket.TextMessage, body); err != nil {
+			_ = c.Close()
+			delete(h.conns, c)
+		}
+	}
+}
+
+// NotifyMetricsUpdate should be called after SetMetrics to push to browsers.
+func (h *Hub) NotifyMetricsUpdate(serverID string, metricsJSON []byte) {
+	h.SetMetrics(serverID, metricsJSON)
+	h.BroadcastSnapshot()
+}
diff --git a/mengyamonitor-backend-server/internal/ingest/server.go b/mengyamonitor-backend-server/internal/ingest/server.go
new file mode 100644
index 0000000..318d8f5
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/ingest/server.go
@@ -0,0 +1,82 @@
+package ingest
+
+import (
+	"database/sql"
+	"errors"
+	"io"
+	"log"
+
+	"mengyamonitor-backend-server/internal/gen/mengyav1"
+	"mengyamonitor-backend-server/internal/hub"
+	"mengyamonitor-backend-server/internal/store"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type Server struct {
+	mengyav1.UnimplementedAgentIngestServer
+	Store *store.Store
+	Hub   *hub.Hub
+}
+
+func (s *Server) Connect(stream grpc.BidiStreamingServer[mengyav1.AgentMessage, mengyav1.ControlMessage]) error {
+	var authedID string
+	for {
+		msg, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		ctx := stream.Context()
+
+		switch {
+		case msg.GetHello() != nil:
+			h := msg.GetHello()
+			srv, err := s.Store.VerifyAgent(ctx, h.GetServerId(), h.GetAgentKey())
+			if err != nil {
+				if errors.Is(err, sql.ErrNoRows) {
+					log.Printf("ingest: auth failed server_id=%q: no such id (SERVER_ID must be the UUID from admin table, not the display name)", h.GetServerId())
+				} else {
+					log.Printf("ingest: auth failed server_id=%s: %v", h.GetServerId(), err)
+				}
+				return status.Errorf(codes.Unauthenticated, "invalid credentials")
+			}
+			authedID = srv.ID
+			_ = stream.Send(&mengyav1.ControlMessage{
+				Payload: &mengyav1.ControlMessage_Ack{
+					Ack: &mengyav1.Ack{Message: "hello_ok"},
+				},
+			})
+
+		case msg.GetHeartbeat() != nil:
+			if authedID == "" {
+				continue
+			}
+			_ = stream.Send(&mengyav1.ControlMessage{
+				Payload: &mengyav1.ControlMessage_Ack{
+					Ack: &mengyav1.Ack{Message: "pong"},
+				},
+			})
+
+		case msg.GetMetrics() != nil:
+			if authedID == "" {
+				return status.Errorf(codes.FailedPrecondition, "send hello first")
+			}
+			m := msg.GetMetrics()
+			if len(m.GetPayloadJson()) == 0 {
+				continue
+			}
+			s.Hub.NotifyMetricsUpdate(authedID, []byte(m.GetPayloadJson()))
+			_ = stream.Send(&mengyav1.ControlMessage{
+				Payload: &mengyav1.ControlMessage_Ack{
+					Ack: &mengyav1.Ack{Message: "metrics_ok"},
+				},
+			})
+		}
+	}
+}
diff --git a/mengyamonitor-backend-server/internal/middleware/admin.go b/mengyamonitor-backend-server/internal/middleware/admin.go
new file mode 100644
index 0000000..d7ff37e
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/middleware/admin.go
@@ -0,0 +1,23 @@
+package middleware
+
+import (
+	"crypto/subtle"
+	"net/http"
+
+	"mengyamonitor-backend-server/internal/config"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AdminToken rejects requests without a valid X-Admin-Token header.
+func AdminToken(cfg *config.Config) gin.HandlerFunc {
+	tok := []byte(cfg.AdminToken)
+	return func(c *gin.Context) {
+		given := []byte(c.GetHeader("X-Admin-Token"))
+		if subtle.ConstantTimeCompare(given, tok) != 1 {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+			return
+		}
+		c.Next()
+	}
+}
diff --git a/mengyamonitor-backend-server/internal/model/server.go b/mengyamonitor-backend-server/internal/model/server.go
new file mode 100644
index 0000000..7ac08c8
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/model/server.go
@@ -0,0 +1,35 @@
+package model
+
+import "time"
+
+// MonitoredServer is persisted and exposed to the frontend display.
+type MonitoredServer struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	URL       string    `json:"url"`
+	Enabled   bool      `json:"enabled"`
+	SortOrder int       `json:"sortOrder"`
+	AgentKey  string    `json:"agentKey,omitempty"`
+	CreatedAt time.Time `json:"createdAt,omitempty"`
+}
+
+type CreateServerInput struct {
+	Name    string `json:"name" binding:"required"`
+	URL     string `json:"url"`
+	Enabled *bool  `json:"enabled"`
+}
+
+type UpdateServerInput struct {
+	Name     string  `json:"name"`
+	URL      *string `json:"url"`
+	Enabled  *bool   `json:"enabled"`
+	AgentKey *string `json:"agentKey"`
+}
+
+type ReorderInput struct {
+	IDs []string `json:"ids" binding:"required"`
+}
+
+type AuthInput struct {
+	Token string `json:"token" binding:"required"`
+}
diff --git a/mengyamonitor-backend-server/internal/router/router.go b/mengyamonitor-backend-server/internal/router/router.go
new file mode 100644
index 0000000..4a307f4
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/router/router.go
@@ -0,0 +1,71 @@
+package router
+
+import (
+	"net/http"
+
+	"mengyamonitor-backend-server/internal/config"
+	"mengyamonitor-backend-server/internal/handler"
+	"mengyamonitor-backend-server/internal/hub"
+	"mengyamonitor-backend-server/internal/middleware"
+	"mengyamonitor-backend-server/internal/store"
+
+	"github.com/gin-gonic/gin"
+)
+
+func New(cfg *config.Config, st *store.Store, h *hub.Hub) *gin.Engine {
+	gin.SetMode(gin.ReleaseMode)
+	r := gin.New()
+	r.Use(gin.Logger(), gin.Recovery())
+
+	// 公网宽松 CORS：任意 Origin + 透传浏览器请求的 Header（预检）
+	r.Use(func(c *gin.Context) {
+		h := c.Writer.Header()
+		origin := c.GetHeader("Origin")
+		if origin != "" {
+			h.Set("Access-Control-Allow-Origin", origin)
+			h.Set("Access-Control-Allow-Credentials", "true")
+		} else {
+			h.Set("Access-Control-Allow-Origin", "*")
+		}
+		h.Set("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS")
+		if reqH := c.GetHeader("Access-Control-Request-Headers"); reqH != "" {
+			h.Set("Access-Control-Allow-Headers", reqH)
+		} else {
+			h.Set("Access-Control-Allow-Headers", "Content-Type, X-Admin-Token, Authorization, Accept, Origin, X-Requested-With")
+		}
+		h.Set("Access-Control-Max-Age", "86400")
+		if c.Request.Method == http.MethodOptions {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+		c.Next()
+	})
+
+	pub := &handler.Public{Store: st}
+	r.GET("/", pub.Root)
+	r.GET("/api/health", pub.Health)
+	r.GET("/api/servers", pub.ListServers)
+	r.GET("/api/ws/monitor", handler.MonitorWebSocket(h))
+
+	adm := &handler.Admin{Store: st, Cfg: cfg}
+	r.POST("/api/admin/auth", adm.Auth)
+	adminG := r.Group("/api/admin")
+	adminG.Use(middleware.AdminToken(cfg))
+	{
+		adminG.GET("/servers", adm.ListServers)
+		adminG.POST("/servers", adm.CreateServer)
+		adminG.PUT("/servers/reorder", adm.Reorder)
+		adminG.PUT("/servers/:id", adm.UpdateServer)
+		adminG.DELETE("/servers/:id", adm.DeleteServer)
+	}
+
+	r.NoRoute(func(c *gin.Context) {
+		c.JSON(http.StatusNotFound, gin.H{
+			"error":  "not_found",
+			"path":   c.Request.URL.Path,
+			"method": c.Request.Method,
+		})
+	})
+
+	return r
+}
diff --git a/mengyamonitor-backend-server/internal/store/sqlite.go b/mengyamonitor-backend-server/internal/store/sqlite.go
new file mode 100644
index 0000000..5fffb1c
--- /dev/null
+++ b/mengyamonitor-backend-server/internal/store/sqlite.go
@@ -0,0 +1,307 @@
+package store
+
+import (
+	"context"
+	"crypto/subtle"
+	"database/sql"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"mengyamonitor-backend-server/internal/model"
+
+	"github.com/google/uuid"
+	_ "modernc.org/sqlite"
+)
+
+type Store struct {
+	db *sql.DB
+}
+
+func Open(dbPath string) (*Store, error) {
+	dir := filepath.Dir(dbPath)
+	if dir != "." && dir != "" {
+		if err := os.MkdirAll(dir, 0o755); err != nil {
+			return nil, err
+		}
+	}
+	db, err := sql.Open("sqlite", dbPath+"?_pragma=foreign_keys(1)")
+	if err != nil {
+		return nil, err
+	}
+	if err := db.Ping(); err != nil {
+		_ = db.Close()
+		return nil, err
+	}
+	s := &Store{db: db}
+	if err := s.migrate(); err != nil {
+		_ = db.Close()
+		return nil, err
+	}
+	return s, nil
+}
+
+func (s *Store) Close() error {
+	return s.db.Close()
+}
+
+func (s *Store) migrate() error {
+	const ddl = `
+CREATE TABLE IF NOT EXISTS servers (
+	id TEXT PRIMARY KEY,
+	name TEXT NOT NULL,
+	url TEXT NOT NULL,
+	enabled INTEGER NOT NULL DEFAULT 1,
+	sort_order INTEGER NOT NULL DEFAULT 0,
+	created_at TEXT NOT NULL
+);
+CREATE INDEX IF NOT EXISTS idx_servers_sort ON servers(sort_order);
+`
+	if _, err := s.db.Exec(ddl); err != nil {
+		return err
+	}
+	return s.ensureAgentKeyColumn()
+}
+
+func (s *Store) ensureAgentKeyColumn() error {
+	rows, err := s.db.Query(`PRAGMA table_info(servers)`)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var cid int
+		var name, typ string
+		var notnull, pk int
+		var dflt sql.NullString
+		if err := rows.Scan(&cid, &name, &typ, &notnull, &dflt, &pk); err != nil {
+			return err
+		}
+		if name == "agent_key" {
+			return nil
+		}
+	}
+	if err := rows.Err(); err != nil {
+		return err
+	}
+	if _, err = s.db.Exec(`ALTER TABLE servers ADD COLUMN agent_key TEXT`); err != nil {
+		return err
+	}
+	// Backfill keys for existing rows so gRPC can be enabled without manual SQL.
+	bRows, err := s.db.Query(`SELECT id FROM servers WHERE agent_key IS NULL OR agent_key = ''`)
+	if err != nil {
+		return err
+	}
+	var ids []string
+	for bRows.Next() {
+		var id string
+		if err := bRows.Scan(&id); err != nil {
+			_ = bRows.Close()
+			return err
+		}
+		ids = append(ids, id)
+	}
+	_ = bRows.Close()
+	for _, id := range ids {
+		if _, err := s.db.Exec(`UPDATE servers SET agent_key = ? WHERE id = ?`, uuid.NewString(), id); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *Store) ListEnabled(ctx context.Context) ([]model.MonitoredServer, error) {
+	rows, err := s.db.QueryContext(ctx, `
+SELECT id, name, url, enabled, sort_order, agent_key, created_at
+FROM servers WHERE enabled = 1 ORDER BY sort_order ASC, created_at ASC`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanServers(rows)
+}
+
+func (s *Store) ListAll(ctx context.Context) ([]model.MonitoredServer, error) {
+	rows, err := s.db.QueryContext(ctx, `
+SELECT id, name, url, enabled, sort_order, agent_key, created_at
+FROM servers ORDER BY sort_order ASC, created_at ASC`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanServers(rows)
+}
+
+func scanServers(rows *sql.Rows) ([]model.MonitoredServer, error) {
+	out := make([]model.MonitoredServer, 0)
+	for rows.Next() {
+		var m model.MonitoredServer
+		var enabled int
+		var created, agKey sql.NullString
+		if err := rows.Scan(&m.ID, &m.Name, &m.URL, &enabled, &m.SortOrder, &agKey, &created); err != nil {
+			return nil, err
+		}
+		m.Enabled = enabled != 0
+		if agKey.Valid {
+			m.AgentKey = agKey.String
+		}
+		if t, err := time.Parse(time.RFC3339Nano, created.String); err == nil {
+			m.CreatedAt = t
+		}
+		out = append(out, m)
+	}
+	return out, rows.Err()
+}
+
+func (s *Store) Create(ctx context.Context, in model.CreateServerInput) (*model.MonitoredServer, error) {
+	name := strings.TrimSpace(in.Name)
+	urlStr := normalizeURL(strings.TrimSpace(in.URL))
+	if name == "" {
+		return nil, errors.New("invalid name")
+	}
+	enabled := true
+	if in.Enabled != nil {
+		enabled = *in.Enabled
+	}
+	var maxOrder int
+	_ = s.db.QueryRowContext(ctx, `SELECT COALESCE(MAX(sort_order), -1) FROM servers`).Scan(&maxOrder)
+	id := uuid.NewString()
+	agentKey := uuid.NewString()
+	now := time.Now().UTC()
+	_, err := s.db.ExecContext(ctx, `
+INSERT INTO servers (id, name, url, enabled, sort_order, agent_key, created_at)
+VALUES (?, ?, ?, ?, ?, ?, ?)`,
+		id, name, urlStr, boolToInt(enabled), maxOrder+1, agentKey, now.Format(time.RFC3339Nano))
+	if err != nil {
+		return nil, err
+	}
+	return &model.MonitoredServer{
+		ID: id, Name: name, URL: urlStr, Enabled: enabled, SortOrder: maxOrder + 1, AgentKey: agentKey, CreatedAt: now,
+	}, nil
+}
+
+func (s *Store) Update(ctx context.Context, id string, in model.UpdateServerInput) (*model.MonitoredServer, error) {
+	cur, err := s.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	name := cur.Name
+	urlStr := cur.URL
+	enabled := cur.Enabled
+	if in.Name != "" {
+		name = strings.TrimSpace(in.Name)
+	}
+	if in.URL != nil {
+		urlStr = normalizeURL(strings.TrimSpace(*in.URL))
+	}
+	if in.Enabled != nil {
+		enabled = *in.Enabled
+	}
+	if name == "" {
+		return nil, errors.New("invalid name")
+	}
+	agentKey := cur.AgentKey
+	if in.AgentKey != nil {
+		agentKey = *in.AgentKey
+	}
+	_, err = s.db.ExecContext(ctx, `UPDATE servers SET name = ?, url = ?, enabled = ?, agent_key = ? WHERE id = ?`,
+		name, urlStr, boolToInt(enabled), nullIfEmpty(agentKey), id)
+	if err != nil {
+		return nil, err
+	}
+	cur.Name, cur.URL, cur.Enabled, cur.AgentKey = name, urlStr, enabled, agentKey
+	return cur, nil
+}
+
+func (s *Store) Get(ctx context.Context, id string) (*model.MonitoredServer, error) {
+	var m model.MonitoredServer
+	var enabled int
+	var created, agKey sql.NullString
+	err := s.db.QueryRowContext(ctx, `
+SELECT id, name, url, enabled, sort_order, agent_key, created_at FROM servers WHERE id = ?`, id).
+		Scan(&m.ID, &m.Name, &m.URL, &enabled, &m.SortOrder, &agKey, &created)
+	if errors.Is(err, sql.ErrNoRows) {
+		return nil, err
+	}
+	if err != nil {
+		return nil, err
+	}
+	m.Enabled = enabled != 0
+	if agKey.Valid {
+		m.AgentKey = agKey.String
+	}
+	if t, err := time.Parse(time.RFC3339Nano, created.String); err == nil {
+		m.CreatedAt = t
+	}
+	return &m, nil
+}
+
+// VerifyAgent checks server_id + agent_key for gRPC ingest.
+func (s *Store) VerifyAgent(ctx context.Context, id, key string) (*model.MonitoredServer, error) {
+	srv, err := s.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	if !srv.Enabled {
+		return nil, errors.New("disabled")
+	}
+	if srv.AgentKey == "" {
+		return nil, errors.New("agent_key not set")
+	}
+	if subtle.ConstantTimeCompare([]byte(srv.AgentKey), []byte(key)) != 1 {
+		return nil, errors.New("invalid agent_key")
+	}
+	return srv, nil
+}
+
+func nullIfEmpty(s string) any {
+	if s == "" {
+		return nil
+	}
+	return s
+}
+
+func (s *Store) Delete(ctx context.Context, id string) error {
+	res, err := s.db.ExecContext(ctx, `DELETE FROM servers WHERE id = ?`, id)
+	if err != nil {
+		return err
+	}
+	n, _ := res.RowsAffected()
+	if n == 0 {
+		return sql.ErrNoRows
+	}
+	return nil
+}
+
+func (s *Store) Reorder(ctx context.Context, ids []string) error {
+	tx, err := s.db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback() }()
+	for i, id := range ids {
+		if _, err := tx.ExecContext(ctx, `UPDATE servers SET sort_order = ? WHERE id = ?`, i, id); err != nil {
+			return err
+		}
+	}
+	return tx.Commit()
+}
+
+func boolToInt(b bool) int {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func normalizeURL(u string) string {
+	if u == "" {
+		return ""
+	}
+	if !strings.HasPrefix(strings.ToLower(u), "http://") && !strings.HasPrefix(strings.ToLower(u), "https://") {
+		return "http://" + u
+	}
+	return u
+}
diff --git a/mengyamonitor-backend-server/main.go b/mengyamonitor-backend-server/main.go
new file mode 100644
index 0000000..d403f5e
--- /dev/null
+++ b/mengyamonitor-backend-server/main.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"mengyamonitor-backend-server/internal/config"
+	"mengyamonitor-backend-server/internal/grpcrun"
+	"mengyamonitor-backend-server/internal/hub"
+	"mengyamonitor-backend-server/internal/ingest"
+	"mengyamonitor-backend-server/internal/router"
+	"mengyamonitor-backend-server/internal/store"
+)
+
+func main() {
+	cfg := config.Load()
+	st, err := store.Open(cfg.DBPath)
+	if err != nil {
+		log.Fatalf("store: %v", err)
+	}
+	defer st.Close()
+
+	metricsHub := hub.New()
+	ingestSrv := &ingest.Server{Store: st, Hub: metricsHub}
+
+	grpcAddr := fmt.Sprintf("%s:%s", cfg.Host, cfg.GRPCPort)
+	go func() {
+		log.Printf("gRPC AgentIngest listening on %s", grpcAddr)
+		if err := grpcrun.Serve(grpcAddr, ingestSrv); err != nil {
+			log.Fatalf("grpc: %v", err)
+		}
+	}()
+
+	httpAddr := fmt.Sprintf("%s:%s", cfg.Host, cfg.Port)
+	log.Printf("central HTTP/WS on http://%s", httpAddr)
+	if err := router.New(cfg, st, metricsHub).Run(httpAddr); err != nil {
+		log.Fatalf("http: %v", err)
+	}
+}
diff --git a/mengyamonitor-backend-server/proto/mengya/v1/agent.proto b/mengyamonitor-backend-server/proto/mengya/v1/agent.proto
new file mode 100644
index 0000000..371f5e6
--- /dev/null
+++ b/mengyamonitor-backend-server/proto/mengya/v1/agent.proto
@@ -0,0 +1,41 @@
+syntax = "proto3";
+
+package mengya.v1;
+
+option go_package = "mengyamonitor-backend-server/internal/gen/mengyav1;mengyav1";
+
+// AgentIngest: 采集端出站连接，双向流上报指标。
+service AgentIngest {
+  rpc Connect(stream AgentMessage) returns (stream ControlMessage);
+}
+
+message AgentMessage {
+  oneof payload {
+    Hello hello = 1;
+    Heartbeat heartbeat = 2;
+    MetricsReport metrics = 3;
+  }
+}
+
+message Hello {
+  string server_id = 1;
+  string agent_key = 2;
+  string hostname = 3;
+}
+
+message Heartbeat {}
+
+message MetricsReport {
+  string payload_json = 1;
+  int64 collected_at_unix_ms = 2;
+}
+
+message ControlMessage {
+  oneof payload {
+    Ack ack = 1;
+  }
+}
+
+message Ack {
+  string message = 1;
+}
diff --git a/mengyamonitor-backend/build_amd64.sh b/mengyamonitor-backend/build_amd64.sh
deleted file mode 100644
index 1e6e86e..0000000
--- a/mengyamonitor-backend/build_amd64.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-# 编译脚本 - 兼容旧版本 GLIBC
-
-echo "开始编译 mengyamonitor-backend..."
-
-# 禁用 CGO，使用纯 Go 编译（不依赖系统 C 库）
-export CGO_ENABLED=0
-
-# 设置目标平台
-export GOOS=linux
-export GOARCH=amd64
-
-# 编译（静态链接）
-go build -ldflags="-s -w" -o mengyamonitor-backend .
-
-if [ $? -eq 0 ]; then
-    echo "编译成功！"
-    echo "二进制文件: mengyamonitor-backend"
-    echo ""
-    echo "检查文件信息:"
-    file mengyamonitor-backend
-    echo ""
-    echo "检查依赖库:"
-    ldd mengyamonitor-backend 2>/dev/null || echo "静态链接，无外部依赖"
-else
-    echo "编译失败！"
-    exit 1
-fi
-
diff --git a/mengyamonitor-backend/build_arm64.sh b/mengyamonitor-backend/build_arm64.sh
deleted file mode 100644
index a51970a..0000000
--- a/mengyamonitor-backend/build_arm64.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/bash
-# Linux ARM64 交叉编译脚本
-
-echo "开始交叉编译 mengyamonitor-backend (Linux ARM64)..."
-
-# 禁用 CGO，使用纯 Go 编译（不依赖系统 C 库）
-export CGO_ENABLED=0
-
-# 设置目标平台为 Linux ARM64
-export GOOS=linux
-export GOARCH=arm64
-
-# 编译（静态链接）
-go build -ldflags="-s -w" -o mengyamonitor-backend-arm64 .
-
-if [ $? -eq 0 ]; then
-    echo "编译成功！"
-    echo "二进制文件: mengyamonitor-backend-arm64"
-    echo ""
-    echo "目标平台: Linux ARM64"
-    echo "编译模式: 静态链接，无外部依赖"
-    echo ""
-    echo "检查文件信息:"
-    file mengyamonitor-backend-arm64 2>/dev/null || echo "文件已生成: mengyamonitor-backend-arm64"
-    echo ""
-    ls -lh mengyamonitor-backend-arm64
-else
-    echo "编译失败！"
-    exit 1
-fi
diff --git a/mengyamonitor-backend/go.mod b/mengyamonitor-backend/go.mod
deleted file mode 100644
index ddf7f21..0000000
--- a/mengyamonitor-backend/go.mod
+++ /dev/null
@@ -1,3 +0,0 @@
-module mengyamonitor-backend
-
-go 1.22
diff --git a/mengyamonitor-backend/latency.go b/mengyamonitor-backend/latency.go
deleted file mode 100644
index 564fc1c..0000000
--- a/mengyamonitor-backend/latency.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"net"
-	"time"
-)
-
-// LatencyInfo 延迟信息
-type LatencyInfo struct {
-	ClientToServer float64            `json:"clientToServer"` // 客户端到服务器延迟（ms），由前端计算
-	External       map[string]string `json:"external"`        // 外部网站延迟
-}
-
-// checkExternalLatency 检测外部网站延迟
-func checkExternalLatency(host string, timeout time.Duration) string {
-	start := time.Now()
-	
-	// 尝试 TCP 连接 80 端口
-	conn, err := net.DialTimeout("tcp", host+":80", timeout)
-	if err != nil {
-		// 如果 80 端口失败，尝试 443 (HTTPS)
-		conn, err = net.DialTimeout("tcp", host+":443", timeout)
-		if err != nil {
-			return "超时"
-		}
-	}
-	defer conn.Close()
-	
-	latency := time.Since(start).Milliseconds()
-	
-	// 检查是否超时（超过超时时间的一半就认为可能有问题）
-	if latency > timeout.Milliseconds()/2 {
-		return "超时"
-	}
-	
-	return fmt.Sprintf("%d ms", latency)
-}
-
-// readExternalLatencies 读取外部网站延迟
-func readExternalLatencies() map[string]string {
-	latencies := make(map[string]string)
-	timeout := 3 * time.Second
-
-	// 检测百度
-	latencies["baidu.com"] = checkExternalLatency("baidu.com", timeout)
-
-	// 检测谷歌
-	latencies["google.com"] = checkExternalLatency("google.com", timeout)
-
-	// 检测 GitHub
-	latencies["github.com"] = checkExternalLatency("github.com", timeout)
-
-	return latencies
-}
-
diff --git a/mengyamonitor-backend/main.go b/mengyamonitor-backend/main.go
deleted file mode 100644
index 39c2d6d..0000000
--- a/mengyamonitor-backend/main.go
+++ /dev/null
@@ -1,265 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"log"
-	"net/http"
-	"os"
-	"runtime"
-	"time"
-)
-
-// envelope keeps JSON responses consistent.
-type envelope map[string]any
-
-func main() {
-	host := getenv("HOST", "0.0.0.0")
-	port := getenv("PORT", "9292")
-
-	mux := http.NewServeMux()
-	mux.HandleFunc("/", rootHandler)
-	mux.HandleFunc("/api/health", healthHandler)
-	// 拆分的细粒度API端点
-	mux.HandleFunc("/api/metrics/cpu", cpuMetricsHandler)
-	mux.HandleFunc("/api/metrics/memory", memoryMetricsHandler)
-	mux.HandleFunc("/api/metrics/storage", storageMetricsHandler)
-	mux.HandleFunc("/api/metrics/gpu", gpuMetricsHandler)
-	mux.HandleFunc("/api/metrics/network", networkMetricsHandler)
-	mux.HandleFunc("/api/metrics/system", systemMetricsHandler)
-	mux.HandleFunc("/api/metrics/docker", dockerMetricsHandler)
-	mux.HandleFunc("/api/metrics/latency", latencyMetricsHandler)
-
-	srv := &http.Server{
-		Addr:              fmt.Sprintf("%s:%s", host, port),
-		Handler:           loggingMiddleware(corsMiddleware(mux)),
-		ReadHeaderTimeout: 5 * time.Second,
-	}
-
-	log.Printf("server starting on http://%s:%s", host, port)
-	if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
-		log.Fatalf("server error: %v", err)
-	}
-}
-
-func rootHandler(w http.ResponseWriter, r *http.Request) {
-	respondJSON(w, http.StatusOK, envelope{
-		"service": "萌芽监控面板 API",
-		"version": "1.0.0",
-		"endpoints": []map[string]string{
-			{
-				"path":        "/",
-				"description": "API 信息和可用端点列表",
-			},
-			{
-				"path":        "/api/health",
-				"description": "健康检查",
-			},
-			{
-				"path":        "/api/metrics/cpu",
-				"description": "获取 CPU 监控数据",
-			},
-			{
-				"path":        "/api/metrics/memory",
-				"description": "获取内存监控数据",
-			},
-			{
-				"path":        "/api/metrics/storage",
-				"description": "获取存储监控数据",
-			},
-			{
-				"path":        "/api/metrics/gpu",
-				"description": "获取 GPU 监控数据",
-			},
-			{
-				"path":        "/api/metrics/network",
-				"description": "获取网络接口监控数据",
-			},
-			{
-				"path":        "/api/metrics/system",
-				"description": "获取系统统计信息（进程、包、磁盘速度等）",
-			},
-			{
-				"path":        "/api/metrics/docker",
-				"description": "获取 Docker 容器监控数据",
-			},
-		},
-	})
-}
-
-func healthHandler(w http.ResponseWriter, r *http.Request) {
-	respondJSON(w, http.StatusOK, envelope{
-		"status":    "ok",
-		"timestamp": time.Now().UTC(),
-	})
-}
-
-// CPU监控数据
-func cpuMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	cpuModel := firstMatchInFile("/proc/cpuinfo", "model name")
-	cpuUsage, err := readCPUUsage()
-	if err != nil {
-		cpuUsage = 0
-	}
-	cpuTemp := readCPUTemperature()
-	perCoreUsage := readPerCoreUsage()
-	loads := readLoadAverages()
-
-	cores := runtime.NumCPU()
-	respondJSON(w, http.StatusOK, envelope{
-		"data": CPUMetrics{
-			Model:        cpuModel,
-			Cores:        cores,
-			UsagePercent: round(cpuUsage, 2),
-			LoadAverages: loads,
-			Temperature:  cpuTemp,
-			PerCoreUsage: perCoreUsage,
-		},
-	})
-}
-
-// 内存监控数据
-func memoryMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	mem, err := readMemory()
-	if err != nil {
-		respondJSON(w, http.StatusInternalServerError, envelope{
-			"error": "failed to read memory",
-		})
-		return
-	}
-	respondJSON(w, http.StatusOK, envelope{
-		"data": mem,
-	})
-}
-
-// 存储监控数据
-func storageMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	storage, err := readAllStorage()
-	if err != nil {
-		respondJSON(w, http.StatusInternalServerError, envelope{
-			"error": "failed to read storage",
-		})
-		return
-	}
-	respondJSON(w, http.StatusOK, envelope{
-		"data": storage,
-	})
-}
-
-// GPU监控数据
-func gpuMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	gpu := readGPU()
-	respondJSON(w, http.StatusOK, envelope{
-		"data": gpu,
-	})
-}
-
-// 网络监控数据
-func networkMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	network := readNetworkInterfaces()
-	respondJSON(w, http.StatusOK, envelope{
-		"data": network,
-	})
-}
-
-// 系统统计信息
-func systemMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	stats := readSystemStats()
-	
-	// 读取系统基本信息
-	hostname, _ := os.Hostname()
-	osInfo := readOSInfo()
-	uptime := readUptime()
-	
-	// 计算总网络速度（汇总所有接口）
-	networkInterfaces := readNetworkInterfaces()
-	var totalRxSpeed, totalTxSpeed float64
-	for _, iface := range networkInterfaces {
-		totalRxSpeed += iface.RxSpeed // bytes/s
-		totalTxSpeed += iface.TxSpeed // bytes/s
-	}
-	// 转换为 MB/s
-	stats.NetworkRxSpeed = round(totalRxSpeed/1024/1024, 2)
-	stats.NetworkTxSpeed = round(totalTxSpeed/1024/1024, 2)
-	
-	respondJSON(w, http.StatusOK, envelope{
-		"data": map[string]interface{}{
-			"hostname":      hostname,
-			"os":            osInfo,
-			"uptimeSeconds": uptime,
-			"processCount":  stats.ProcessCount,
-			"packageCount":  stats.PackageCount,
-			"packageManager": stats.PackageManager,
-			"temperature":   stats.Temperature,
-			"diskReadSpeed": stats.DiskReadSpeed,
-			"diskWriteSpeed": stats.DiskWriteSpeed,
-			"networkRxSpeed": stats.NetworkRxSpeed,
-			"networkTxSpeed": stats.NetworkTxSpeed,
-			"topProcesses":  stats.TopProcesses,
-			"systemLogs":    stats.SystemLogs,
-		},
-	})
-}
-
-// Docker监控数据
-func dockerMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	docker := readDockerStats()
-	respondJSON(w, http.StatusOK, envelope{
-		"data": docker,
-	})
-}
-
-// 延迟监控数据
-func latencyMetricsHandler(w http.ResponseWriter, r *http.Request) {
-	// 记录请求开始时间，用于计算客户端到服务器的延迟
-	startTime := time.Now()
-	
-	// 读取外部网站延迟
-	externalLatencies := readExternalLatencies()
-	
-	// 计算服务器处理时间（这个可以作为参考，实际客户端延迟由前端计算）
-	serverProcessTime := time.Since(startTime).Milliseconds()
-	
-	respondJSON(w, http.StatusOK, envelope{
-		"data": map[string]interface{}{
-			"serverProcessTime": serverProcessTime, // 服务器处理时间（参考）
-			"external":          externalLatencies,
-		},
-	})
-}
-
-func respondJSON(w http.ResponseWriter, status int, body envelope) {
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(status)
-	if err := json.NewEncoder(w).Encode(body); err != nil {
-		log.Printf("write json error: %v", err)
-	}
-}
-
-func getenv(key, fallback string) string {
-	if v, ok := os.LookupEnv(key); ok && v != "" {
-		return v
-	}
-	return fallback
-}
-
-func loggingMiddleware(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		start := time.Now()
-		next.ServeHTTP(w, r)
-		log.Printf("%s %s %s", r.Method, r.URL.Path, time.Since(start))
-	})
-}
-
-func corsMiddleware(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Access-Control-Allow-Origin", "*")
-		w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
-		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
-		if r.Method == http.MethodOptions {
-			w.WriteHeader(http.StatusNoContent)
-			return
-		}
-		next.ServeHTTP(w, r)
-	})
-}
diff --git a/mengyamonitor-backend/memory.go b/mengyamonitor-backend/memory.go
deleted file mode 100644
index 4299a08..0000000
--- a/mengyamonitor-backend/memory.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"os"
-	"strconv"
-	"strings"
-)
-
-// readMemory 读取内存信息
-func readMemory() (MemoryMetrics, error) {
-	totals := map[string]uint64{}
-	f, err := os.Open("/proc/meminfo")
-	if err != nil {
-		return MemoryMetrics{}, err
-	}
-	defer f.Close()
-	scanner := bufio.NewScanner(f)
-	for scanner.Scan() {
-		line := scanner.Text()
-		parts := strings.Split(line, ":")
-		if len(parts) < 2 {
-			continue
-		}
-		key := strings.TrimSpace(parts[0])
-		fields := strings.Fields(strings.TrimSpace(parts[1]))
-		if len(fields) == 0 {
-			continue
-		}
-		value, err := strconv.ParseUint(fields[0], 10, 64)
-		if err != nil {
-			continue
-		}
-		totals[key] = value * 1024 // kB to bytes
-	}
-	total := totals["MemTotal"]
-	
-	// 优先使用 MemAvailable（Linux 3.14+），如果没有则计算
-	var free uint64
-	if available, ok := totals["MemAvailable"]; ok && available > 0 {
-		free = available
-	} else {
-		// 回退到 MemFree + Buffers + Cached（适用于较老的系统）
-		free = totals["MemFree"]
-		if buffers, ok := totals["Buffers"]; ok {
-			free += buffers
-		}
-		if cached, ok := totals["Cached"]; ok {
-			free += cached
-		}
-	}
-	
-	used := total - free
-	usedPercent := 0.0
-	if total > 0 {
-		usedPercent = (float64(used) / float64(total)) * 100
-	}
-	return MemoryMetrics{
-		TotalBytes:  total,
-		UsedBytes:   used,
-		FreeBytes:   free,
-		UsedPercent: round(usedPercent, 2),
-	}, nil
-}
diff --git a/mengyamonitor-frontend/.env.production b/mengyamonitor-frontend/.env.production
new file mode 100644
index 0000000..706e29e
--- /dev/null
+++ b/mengyamonitor-frontend/.env.production
@@ -0,0 +1,4 @@
+# 公网：用户通过 https 打开前端时，API 须为浏览器可访问的 https 地址（经 Nginx 反代的中心）
+VITE_CENTRAL_API_URL=https://monitor.api.shumengya.top
+#
+# 若静态站仅内网 http 部署，请改为 http://内网中心IP:9393 后再 npm run build（勿与混合内容冲突）
diff --git a/mengyamonitor-frontend/README.md b/mengyamonitor-frontend/README.md
index dcedbed..c59ca50 100644
--- a/mengyamonitor-frontend/README.md
+++ b/mengyamonitor-frontend/README.md
@@ -57,8 +57,8 @@ npm run preview
 ## 项目结构
 ```
 src/
-├── api/              # API 调用
-│   └── monitor.ts    # 监控 API
+├── api/              # API 调用（中心 REST、管理接口）
+│   └── central.ts
 ├── components/       # React 组件
 │   ├── ServerCard/   # 服务器卡片组件
 │   └── ServerDetail/ # 服务器详情弹窗
@@ -85,11 +85,8 @@ server: {
 }
 ```
 
-### 修改轮询间隔
-编辑 `src/App.tsx` 文件中的 `useServerMonitor` 第二个参数：
-```typescript
-const statuses = useServerMonitor(servers, 2000); // 2000ms = 2秒
-```
+### 实时指标
+看板通过 `useServerMonitor` 连接中心 WebSocket（`/api/ws/monitor`），无 HTTP 轮询。
 
 ## 部署
 
diff --git a/mengyamonitor-frontend/dev-dist/registerSW.js b/mengyamonitor-frontend/dev-dist/registerSW.js
new file mode 100644
index 0000000..1d5625f
--- /dev/null
+++ b/mengyamonitor-frontend/dev-dist/registerSW.js
@@ -0,0 +1 @@
+if('serviceWorker' in navigator) navigator.serviceWorker.register('/dev-sw.js?dev-sw', { scope: '/', type: 'classic' })
\ No newline at end of file
diff --git a/mengyamonitor-frontend/dev-dist/sw.js b/mengyamonitor-frontend/dev-dist/sw.js
new file mode 100644
index 0000000..477c850
--- /dev/null
+++ b/mengyamonitor-frontend/dev-dist/sw.js
@@ -0,0 +1,103 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// If the loader is already loaded, just stop.
+if (!self.define) {
+  let registry = {};
+
+  // Used for `eval` and `importScripts` where we can't get script URL by other means.
+  // In both cases, it's safe to use a global var because those functions are synchronous.
+  let nextDefineUri;
+
+  const singleRequire = (uri, parentUri) => {
+    uri = new URL(uri + ".js", parentUri).href;
+    return registry[uri] || (
+      
+        new Promise(resolve => {
+          if ("document" in self) {
+            const script = document.createElement("script");
+            script.src = uri;
+            script.onload = resolve;
+            document.head.appendChild(script);
+          } else {
+            nextDefineUri = uri;
+            importScripts(uri);
+            resolve();
+          }
+        })
+      
+      .then(() => {
+        let promise = registry[uri];
+        if (!promise) {
+          throw new Error(`Module ${uri} didn’t register its module`);
+        }
+        return promise;
+      })
+    );
+  };
+
+  self.define = (depsNames, factory) => {
+    const uri = nextDefineUri || ("document" in self ? document.currentScript.src : "") || location.href;
+    if (registry[uri]) {
+      // Module is already loading or loaded.
+      return;
+    }
+    let exports = {};
+    const require = depUri => singleRequire(depUri, uri);
+    const specialDeps = {
+      module: { uri },
+      exports,
+      require
+    };
+    registry[uri] = Promise.all(depsNames.map(
+      depName => specialDeps[depName] || require(depName)
+    )).then(deps => {
+      factory(...deps);
+      return exports;
+    });
+  };
+}
+define(['./workbox-6fc00345'], (function (workbox) { 'use strict';
+
+  self.skipWaiting();
+  workbox.clientsClaim();
+
+  /**
+   * The precacheAndRoute() method efficiently caches and responds to
+   * requests for URLs in the manifest.
+   * See https://goo.gl/S9QRab
+   */
+  workbox.precacheAndRoute([{
+    "url": "registerSW.js",
+    "revision": "3ca0b8505b4bec776b69afdba2768812"
+  }, {
+    "url": "index.html",
+    "revision": "0.ds91o44ltm"
+  }], {});
+  workbox.cleanupOutdatedCaches();
+  workbox.registerRoute(new workbox.NavigationRoute(workbox.createHandlerBoundToURL("index.html"), {
+    allowlist: [/^\/$/],
+    denylist: [/^\/central-api(?:\/|$)/]
+  }));
+  workbox.registerRoute(/^https:\/\/.*\/api\//i, new workbox.NetworkFirst({
+    "cacheName": "api-cache",
+    "networkTimeoutSeconds": 10,
+    plugins: [new workbox.ExpirationPlugin({
+      maxEntries: 32,
+      maxAgeSeconds: 300
+    }), new workbox.CacheableResponsePlugin({
+      statuses: [0, 200]
+    })]
+  }), 'GET');
+
+}));
diff --git a/mengyamonitor-frontend/dev-dist/workbox-6fc00345.js b/mengyamonitor-frontend/dev-dist/workbox-6fc00345.js
new file mode 100644
index 0000000..5f2b581
--- /dev/null
+++ b/mengyamonitor-frontend/dev-dist/workbox-6fc00345.js
@@ -0,0 +1,4705 @@
+define(['exports'], (function (exports) { 'use strict';
+
+    // @ts-ignore
+    try {
+      self['workbox:core:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2019 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const logger = (() => {
+      // Don't overwrite this value if it's already set.
+      // See https://github.com/GoogleChrome/workbox/pull/2284#issuecomment-560470923
+      if (!('__WB_DISABLE_DEV_LOGS' in globalThis)) {
+        self.__WB_DISABLE_DEV_LOGS = false;
+      }
+      let inGroup = false;
+      const methodToColorMap = {
+        debug: `#7f8c8d`,
+        log: `#2ecc71`,
+        warn: `#f39c12`,
+        error: `#c0392b`,
+        groupCollapsed: `#3498db`,
+        groupEnd: null // No colored prefix on groupEnd
+      };
+      const print = function (method, args) {
+        if (self.__WB_DISABLE_DEV_LOGS) {
+          return;
+        }
+        if (method === 'groupCollapsed') {
+          // Safari doesn't print all console.groupCollapsed() arguments:
+          // https://bugs.webkit.org/show_bug.cgi?id=182754
+          if (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {
+            console[method](...args);
+            return;
+          }
+        }
+        const styles = [`background: ${methodToColorMap[method]}`, `border-radius: 0.5em`, `color: white`, `font-weight: bold`, `padding: 2px 0.5em`];
+        // When in a group, the workbox prefix is not displayed.
+        const logPrefix = inGroup ? [] : ['%cworkbox', styles.join(';')];
+        console[method](...logPrefix, ...args);
+        if (method === 'groupCollapsed') {
+          inGroup = true;
+        }
+        if (method === 'groupEnd') {
+          inGroup = false;
+        }
+      };
+      // eslint-disable-next-line @typescript-eslint/ban-types
+      const api = {};
+      const loggerMethods = Object.keys(methodToColorMap);
+      for (const key of loggerMethods) {
+        const method = key;
+        api[method] = (...args) => {
+          print(method, args);
+        };
+      }
+      return api;
+    })();
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const messages$1 = {
+      'invalid-value': ({
+        paramName,
+        validValueDescription,
+        value
+      }) => {
+        if (!paramName || !validValueDescription) {
+          throw new Error(`Unexpected input to 'invalid-value' error.`);
+        }
+        return `The '${paramName}' parameter was given a value with an ` + `unexpected value. ${validValueDescription} Received a value of ` + `${JSON.stringify(value)}.`;
+      },
+      'not-an-array': ({
+        moduleName,
+        className,
+        funcName,
+        paramName
+      }) => {
+        if (!moduleName || !className || !funcName || !paramName) {
+          throw new Error(`Unexpected input to 'not-an-array' error.`);
+        }
+        return `The parameter '${paramName}' passed into ` + `'${moduleName}.${className}.${funcName}()' must be an array.`;
+      },
+      'incorrect-type': ({
+        expectedType,
+        paramName,
+        moduleName,
+        className,
+        funcName
+      }) => {
+        if (!expectedType || !paramName || !moduleName || !funcName) {
+          throw new Error(`Unexpected input to 'incorrect-type' error.`);
+        }
+        const classNameStr = className ? `${className}.` : '';
+        return `The parameter '${paramName}' passed into ` + `'${moduleName}.${classNameStr}` + `${funcName}()' must be of type ${expectedType}.`;
+      },
+      'incorrect-class': ({
+        expectedClassName,
+        paramName,
+        moduleName,
+        className,
+        funcName,
+        isReturnValueProblem
+      }) => {
+        if (!expectedClassName || !moduleName || !funcName) {
+          throw new Error(`Unexpected input to 'incorrect-class' error.`);
+        }
+        const classNameStr = className ? `${className}.` : '';
+        if (isReturnValueProblem) {
+          return `The return value from ` + `'${moduleName}.${classNameStr}${funcName}()' ` + `must be an instance of class ${expectedClassName}.`;
+        }
+        return `The parameter '${paramName}' passed into ` + `'${moduleName}.${classNameStr}${funcName}()' ` + `must be an instance of class ${expectedClassName}.`;
+      },
+      'missing-a-method': ({
+        expectedMethod,
+        paramName,
+        moduleName,
+        className,
+        funcName
+      }) => {
+        if (!expectedMethod || !paramName || !moduleName || !className || !funcName) {
+          throw new Error(`Unexpected input to 'missing-a-method' error.`);
+        }
+        return `${moduleName}.${className}.${funcName}() expected the ` + `'${paramName}' parameter to expose a '${expectedMethod}' method.`;
+      },
+      'add-to-cache-list-unexpected-type': ({
+        entry
+      }) => {
+        return `An unexpected entry was passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' The entry ` + `'${JSON.stringify(entry)}' isn't supported. You must supply an array of ` + `strings with one or more characters, objects with a url property or ` + `Request objects.`;
+      },
+      'add-to-cache-list-conflicting-entries': ({
+        firstEntry,
+        secondEntry
+      }) => {
+        if (!firstEntry || !secondEntry) {
+          throw new Error(`Unexpected input to ` + `'add-to-cache-list-duplicate-entries' error.`);
+        }
+        return `Two of the entries passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` + `${firstEntry} but different revision details. Workbox is ` + `unable to cache and version the asset correctly. Please remove one ` + `of the entries.`;
+      },
+      'plugin-error-request-will-fetch': ({
+        thrownErrorMessage
+      }) => {
+        if (!thrownErrorMessage) {
+          throw new Error(`Unexpected input to ` + `'plugin-error-request-will-fetch', error.`);
+        }
+        return `An error was thrown by a plugins 'requestWillFetch()' method. ` + `The thrown error message was: '${thrownErrorMessage}'.`;
+      },
+      'invalid-cache-name': ({
+        cacheNameId,
+        value
+      }) => {
+        if (!cacheNameId) {
+          throw new Error(`Expected a 'cacheNameId' for error 'invalid-cache-name'`);
+        }
+        return `You must provide a name containing at least one character for ` + `setCacheDetails({${cacheNameId}: '...'}). Received a value of ` + `'${JSON.stringify(value)}'`;
+      },
+      'unregister-route-but-not-found-with-method': ({
+        method
+      }) => {
+        if (!method) {
+          throw new Error(`Unexpected input to ` + `'unregister-route-but-not-found-with-method' error.`);
+        }
+        return `The route you're trying to unregister was not  previously ` + `registered for the method type '${method}'.`;
+      },
+      'unregister-route-route-not-registered': () => {
+        return `The route you're trying to unregister was not previously ` + `registered.`;
+      },
+      'queue-replay-failed': ({
+        name
+      }) => {
+        return `Replaying the background sync queue '${name}' failed.`;
+      },
+      'duplicate-queue-name': ({
+        name
+      }) => {
+        return `The Queue name '${name}' is already being used. ` + `All instances of backgroundSync.Queue must be given unique names.`;
+      },
+      'expired-test-without-max-age': ({
+        methodName,
+        paramName
+      }) => {
+        return `The '${methodName}()' method can only be used when the ` + `'${paramName}' is used in the constructor.`;
+      },
+      'unsupported-route-type': ({
+        moduleName,
+        className,
+        funcName,
+        paramName
+      }) => {
+        return `The supplied '${paramName}' parameter was an unsupported type. ` + `Please check the docs for ${moduleName}.${className}.${funcName} for ` + `valid input types.`;
+      },
+      'not-array-of-class': ({
+        value,
+        expectedClass,
+        moduleName,
+        className,
+        funcName,
+        paramName
+      }) => {
+        return `The supplied '${paramName}' parameter must be an array of ` + `'${expectedClass}' objects. Received '${JSON.stringify(value)},'. ` + `Please check the call to ${moduleName}.${className}.${funcName}() ` + `to fix the issue.`;
+      },
+      'max-entries-or-age-required': ({
+        moduleName,
+        className,
+        funcName
+      }) => {
+        return `You must define either config.maxEntries or config.maxAgeSeconds` + `in ${moduleName}.${className}.${funcName}`;
+      },
+      'statuses-or-headers-required': ({
+        moduleName,
+        className,
+        funcName
+      }) => {
+        return `You must define either config.statuses or config.headers` + `in ${moduleName}.${className}.${funcName}`;
+      },
+      'invalid-string': ({
+        moduleName,
+        funcName,
+        paramName
+      }) => {
+        if (!paramName || !moduleName || !funcName) {
+          throw new Error(`Unexpected input to 'invalid-string' error.`);
+        }
+        return `When using strings, the '${paramName}' parameter must start with ` + `'http' (for cross-origin matches) or '/' (for same-origin matches). ` + `Please see the docs for ${moduleName}.${funcName}() for ` + `more info.`;
+      },
+      'channel-name-required': () => {
+        return `You must provide a channelName to construct a ` + `BroadcastCacheUpdate instance.`;
+      },
+      'invalid-responses-are-same-args': () => {
+        return `The arguments passed into responsesAreSame() appear to be ` + `invalid. Please ensure valid Responses are used.`;
+      },
+      'expire-custom-caches-only': () => {
+        return `You must provide a 'cacheName' property when using the ` + `expiration plugin with a runtime caching strategy.`;
+      },
+      'unit-must-be-bytes': ({
+        normalizedRangeHeader
+      }) => {
+        if (!normalizedRangeHeader) {
+          throw new Error(`Unexpected input to 'unit-must-be-bytes' error.`);
+        }
+        return `The 'unit' portion of the Range header must be set to 'bytes'. ` + `The Range header provided was "${normalizedRangeHeader}"`;
+      },
+      'single-range-only': ({
+        normalizedRangeHeader
+      }) => {
+        if (!normalizedRangeHeader) {
+          throw new Error(`Unexpected input to 'single-range-only' error.`);
+        }
+        return `Multiple ranges are not supported. Please use a  single start ` + `value, and optional end value. The Range header provided was ` + `"${normalizedRangeHeader}"`;
+      },
+      'invalid-range-values': ({
+        normalizedRangeHeader
+      }) => {
+        if (!normalizedRangeHeader) {
+          throw new Error(`Unexpected input to 'invalid-range-values' error.`);
+        }
+        return `The Range header is missing both start and end values. At least ` + `one of those values is needed. The Range header provided was ` + `"${normalizedRangeHeader}"`;
+      },
+      'no-range-header': () => {
+        return `No Range header was found in the Request provided.`;
+      },
+      'range-not-satisfiable': ({
+        size,
+        start,
+        end
+      }) => {
+        return `The start (${start}) and end (${end}) values in the Range are ` + `not satisfiable by the cached response, which is ${size} bytes.`;
+      },
+      'attempt-to-cache-non-get-request': ({
+        url,
+        method
+      }) => {
+        return `Unable to cache '${url}' because it is a '${method}' request and ` + `only 'GET' requests can be cached.`;
+      },
+      'cache-put-with-no-response': ({
+        url
+      }) => {
+        return `There was an attempt to cache '${url}' but the response was not ` + `defined.`;
+      },
+      'no-response': ({
+        url,
+        error
+      }) => {
+        let message = `The strategy could not generate a response for '${url}'.`;
+        if (error) {
+          message += ` The underlying error is ${error}.`;
+        }
+        return message;
+      },
+      'bad-precaching-response': ({
+        url,
+        status
+      }) => {
+        return `The precaching request for '${url}' failed` + (status ? ` with an HTTP status of ${status}.` : `.`);
+      },
+      'non-precached-url': ({
+        url
+      }) => {
+        return `createHandlerBoundToURL('${url}') was called, but that URL is ` + `not precached. Please pass in a URL that is precached instead.`;
+      },
+      'add-to-cache-list-conflicting-integrities': ({
+        url
+      }) => {
+        return `Two of the entries passed to ` + `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` + `${url} with different integrity values. Please remove one of them.`;
+      },
+      'missing-precache-entry': ({
+        cacheName,
+        url
+      }) => {
+        return `Unable to find a precached response in ${cacheName} for ${url}.`;
+      },
+      'cross-origin-copy-response': ({
+        origin
+      }) => {
+        return `workbox-core.copyResponse() can only be used with same-origin ` + `responses. It was passed a response with origin ${origin}.`;
+      },
+      'opaque-streams-source': ({
+        type
+      }) => {
+        const message = `One of the workbox-streams sources resulted in an ` + `'${type}' response.`;
+        if (type === 'opaqueredirect') {
+          return `${message} Please do not use a navigation request that results ` + `in a redirect as a source.`;
+        }
+        return `${message} Please ensure your sources are CORS-enabled.`;
+      }
+    };
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const generatorFunction = (code, details = {}) => {
+      const message = messages$1[code];
+      if (!message) {
+        throw new Error(`Unable to find message for code '${code}'.`);
+      }
+      return message(details);
+    };
+    const messageGenerator = generatorFunction;
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Workbox errors should be thrown with this class.
+     * This allows use to ensure the type easily in tests,
+     * helps developers identify errors from workbox
+     * easily and allows use to optimise error
+     * messages correctly.
+     *
+     * @private
+     */
+    class WorkboxError extends Error {
+      /**
+       *
+       * @param {string} errorCode The error code that
+       * identifies this particular error.
+       * @param {Object=} details Any relevant arguments
+       * that will help developers identify issues should
+       * be added as a key on the context object.
+       */
+      constructor(errorCode, details) {
+        const message = messageGenerator(errorCode, details);
+        super(message);
+        this.name = errorCode;
+        this.details = details;
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /*
+     * This method throws if the supplied value is not an array.
+     * The destructed values are required to produce a meaningful error for users.
+     * The destructed and restructured object is so it's clear what is
+     * needed.
+     */
+    const isArray = (value, details) => {
+      if (!Array.isArray(value)) {
+        throw new WorkboxError('not-an-array', details);
+      }
+    };
+    const hasMethod = (object, expectedMethod, details) => {
+      const type = typeof object[expectedMethod];
+      if (type !== 'function') {
+        details['expectedMethod'] = expectedMethod;
+        throw new WorkboxError('missing-a-method', details);
+      }
+    };
+    const isType = (object, expectedType, details) => {
+      if (typeof object !== expectedType) {
+        details['expectedType'] = expectedType;
+        throw new WorkboxError('incorrect-type', details);
+      }
+    };
+    const isInstance = (object,
+    // Need the general type to do the check later.
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    expectedClass, details) => {
+      if (!(object instanceof expectedClass)) {
+        details['expectedClassName'] = expectedClass.name;
+        throw new WorkboxError('incorrect-class', details);
+      }
+    };
+    const isOneOf = (value, validValues, details) => {
+      if (!validValues.includes(value)) {
+        details['validValueDescription'] = `Valid values are ${JSON.stringify(validValues)}.`;
+        throw new WorkboxError('invalid-value', details);
+      }
+    };
+    const isArrayOfClass = (value,
+    // Need general type to do check later.
+    expectedClass,
+    // eslint-disable-line
+    details) => {
+      const error = new WorkboxError('not-array-of-class', details);
+      if (!Array.isArray(value)) {
+        throw error;
+      }
+      for (const item of value) {
+        if (!(item instanceof expectedClass)) {
+          throw error;
+        }
+      }
+    };
+    const finalAssertExports = {
+      hasMethod,
+      isArray,
+      isInstance,
+      isOneOf,
+      isType,
+      isArrayOfClass
+    };
+
+    // @ts-ignore
+    try {
+      self['workbox:routing:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * The default HTTP method, 'GET', used when there's no specific method
+     * configured for a route.
+     *
+     * @type {string}
+     *
+     * @private
+     */
+    const defaultMethod = 'GET';
+    /**
+     * The list of valid HTTP methods associated with requests that could be routed.
+     *
+     * @type {Array<string>}
+     *
+     * @private
+     */
+    const validMethods = ['DELETE', 'GET', 'HEAD', 'PATCH', 'POST', 'PUT'];
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * @param {function()|Object} handler Either a function, or an object with a
+     * 'handle' method.
+     * @return {Object} An object with a handle method.
+     *
+     * @private
+     */
+    const normalizeHandler = handler => {
+      if (handler && typeof handler === 'object') {
+        {
+          finalAssertExports.hasMethod(handler, 'handle', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'handler'
+          });
+        }
+        return handler;
+      } else {
+        {
+          finalAssertExports.isType(handler, 'function', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'handler'
+          });
+        }
+        return {
+          handle: handler
+        };
+      }
+    };
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A `Route` consists of a pair of callback functions, "match" and "handler".
+     * The "match" callback determine if a route should be used to "handle" a
+     * request by returning a non-falsy value if it can. The "handler" callback
+     * is called when there is a match and should return a Promise that resolves
+     * to a `Response`.
+     *
+     * @memberof workbox-routing
+     */
+    class Route {
+      /**
+       * Constructor for Route class.
+       *
+       * @param {workbox-routing~matchCallback} match
+       * A callback function that determines whether the route matches a given
+       * `fetch` event by returning a non-falsy value.
+       * @param {workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resolving to a Response.
+       * @param {string} [method='GET'] The HTTP method to match the Route
+       * against.
+       */
+      constructor(match, handler, method = defaultMethod) {
+        {
+          finalAssertExports.isType(match, 'function', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'match'
+          });
+          if (method) {
+            finalAssertExports.isOneOf(method, validMethods, {
+              paramName: 'method'
+            });
+          }
+        }
+        // These values are referenced directly by Router so cannot be
+        // altered by minificaton.
+        this.handler = normalizeHandler(handler);
+        this.match = match;
+        this.method = method;
+      }
+      /**
+       *
+       * @param {workbox-routing-handlerCallback} handler A callback
+       * function that returns a Promise resolving to a Response
+       */
+      setCatchHandler(handler) {
+        this.catchHandler = normalizeHandler(handler);
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * RegExpRoute makes it easy to create a regular expression based
+     * {@link workbox-routing.Route}.
+     *
+     * For same-origin requests the RegExp only needs to match part of the URL. For
+     * requests against third-party servers, you must define a RegExp that matches
+     * the start of the URL.
+     *
+     * @memberof workbox-routing
+     * @extends workbox-routing.Route
+     */
+    class RegExpRoute extends Route {
+      /**
+       * If the regular expression contains
+       * [capture groups]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#grouping-back-references},
+       * the captured values will be passed to the
+       * {@link workbox-routing~handlerCallback} `params`
+       * argument.
+       *
+       * @param {RegExp} regExp The regular expression to match against URLs.
+       * @param {workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       * @param {string} [method='GET'] The HTTP method to match the Route
+       * against.
+       */
+      constructor(regExp, handler, method) {
+        {
+          finalAssertExports.isInstance(regExp, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'RegExpRoute',
+            funcName: 'constructor',
+            paramName: 'pattern'
+          });
+        }
+        const match = ({
+          url
+        }) => {
+          const result = regExp.exec(url.href);
+          // Return immediately if there's no match.
+          if (!result) {
+            return;
+          }
+          // Require that the match start at the first character in the URL string
+          // if it's a cross-origin request.
+          // See https://github.com/GoogleChrome/workbox/issues/281 for the context
+          // behind this behavior.
+          if (url.origin !== location.origin && result.index !== 0) {
+            {
+              logger.debug(`The regular expression '${regExp.toString()}' only partially matched ` + `against the cross-origin URL '${url.toString()}'. RegExpRoute's will only ` + `handle cross-origin requests if they match the entire URL.`);
+            }
+            return;
+          }
+          // If the route matches, but there aren't any capture groups defined, then
+          // this will return [], which is truthy and therefore sufficient to
+          // indicate a match.
+          // If there are capture groups, then it will return their values.
+          return result.slice(1);
+        };
+        super(match, handler, method);
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const getFriendlyURL = url => {
+      const urlObj = new URL(String(url), location.href);
+      // See https://github.com/GoogleChrome/workbox/issues/2323
+      // We want to include everything, except for the origin if it's same-origin.
+      return urlObj.href.replace(new RegExp(`^${location.origin}`), '');
+    };
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * The Router can be used to process a `FetchEvent` using one or more
+     * {@link workbox-routing.Route}, responding with a `Response` if
+     * a matching route exists.
+     *
+     * If no route matches a given a request, the Router will use a "default"
+     * handler if one is defined.
+     *
+     * Should the matching Route throw an error, the Router will use a "catch"
+     * handler if one is defined to gracefully deal with issues and respond with a
+     * Request.
+     *
+     * If a request matches multiple routes, the **earliest** registered route will
+     * be used to respond to the request.
+     *
+     * @memberof workbox-routing
+     */
+    class Router {
+      /**
+       * Initializes a new Router.
+       */
+      constructor() {
+        this._routes = new Map();
+        this._defaultHandlerMap = new Map();
+      }
+      /**
+       * @return {Map<string, Array<workbox-routing.Route>>} routes A `Map` of HTTP
+       * method name ('GET', etc.) to an array of all the corresponding `Route`
+       * instances that are registered.
+       */
+      get routes() {
+        return this._routes;
+      }
+      /**
+       * Adds a fetch event listener to respond to events when a route matches
+       * the event's request.
+       */
+      addFetchListener() {
+        // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+        self.addEventListener('fetch', event => {
+          const {
+            request
+          } = event;
+          const responsePromise = this.handleRequest({
+            request,
+            event
+          });
+          if (responsePromise) {
+            event.respondWith(responsePromise);
+          }
+        });
+      }
+      /**
+       * Adds a message event listener for URLs to cache from the window.
+       * This is useful to cache resources loaded on the page prior to when the
+       * service worker started controlling it.
+       *
+       * The format of the message data sent from the window should be as follows.
+       * Where the `urlsToCache` array may consist of URL strings or an array of
+       * URL string + `requestInit` object (the same as you'd pass to `fetch()`).
+       *
+       * ```
+       * {
+       *   type: 'CACHE_URLS',
+       *   payload: {
+       *     urlsToCache: [
+       *       './script1.js',
+       *       './script2.js',
+       *       ['./script3.js', {mode: 'no-cors'}],
+       *     ],
+       *   },
+       * }
+       * ```
+       */
+      addCacheListener() {
+        // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+        self.addEventListener('message', event => {
+          // event.data is type 'any'
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+          if (event.data && event.data.type === 'CACHE_URLS') {
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+            const {
+              payload
+            } = event.data;
+            {
+              logger.debug(`Caching URLs from the window`, payload.urlsToCache);
+            }
+            const requestPromises = Promise.all(payload.urlsToCache.map(entry => {
+              if (typeof entry === 'string') {
+                entry = [entry];
+              }
+              const request = new Request(...entry);
+              return this.handleRequest({
+                request,
+                event
+              });
+              // TODO(philipwalton): TypeScript errors without this typecast for
+              // some reason (probably a bug). The real type here should work but
+              // doesn't: `Array<Promise<Response> | undefined>`.
+            })); // TypeScript
+            event.waitUntil(requestPromises);
+            // If a MessageChannel was used, reply to the message on success.
+            if (event.ports && event.ports[0]) {
+              void requestPromises.then(() => event.ports[0].postMessage(true));
+            }
+          }
+        });
+      }
+      /**
+       * Apply the routing rules to a FetchEvent object to get a Response from an
+       * appropriate Route's handler.
+       *
+       * @param {Object} options
+       * @param {Request} options.request The request to handle.
+       * @param {ExtendableEvent} options.event The event that triggered the
+       *     request.
+       * @return {Promise<Response>|undefined} A promise is returned if a
+       *     registered route can handle the request. If there is no matching
+       *     route and there's no `defaultHandler`, `undefined` is returned.
+       */
+      handleRequest({
+        request,
+        event
+      }) {
+        {
+          finalAssertExports.isInstance(request, Request, {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'handleRequest',
+            paramName: 'options.request'
+          });
+        }
+        const url = new URL(request.url, location.href);
+        if (!url.protocol.startsWith('http')) {
+          {
+            logger.debug(`Workbox Router only supports URLs that start with 'http'.`);
+          }
+          return;
+        }
+        const sameOrigin = url.origin === location.origin;
+        const {
+          params,
+          route
+        } = this.findMatchingRoute({
+          event,
+          request,
+          sameOrigin,
+          url
+        });
+        let handler = route && route.handler;
+        const debugMessages = [];
+        {
+          if (handler) {
+            debugMessages.push([`Found a route to handle this request:`, route]);
+            if (params) {
+              debugMessages.push([`Passing the following params to the route's handler:`, params]);
+            }
+          }
+        }
+        // If we don't have a handler because there was no matching route, then
+        // fall back to defaultHandler if that's defined.
+        const method = request.method;
+        if (!handler && this._defaultHandlerMap.has(method)) {
+          {
+            debugMessages.push(`Failed to find a matching route. Falling ` + `back to the default handler for ${method}.`);
+          }
+          handler = this._defaultHandlerMap.get(method);
+        }
+        if (!handler) {
+          {
+            // No handler so Workbox will do nothing. If logs is set of debug
+            // i.e. verbose, we should print out this information.
+            logger.debug(`No route found for: ${getFriendlyURL(url)}`);
+          }
+          return;
+        }
+        {
+          // We have a handler, meaning Workbox is going to handle the route.
+          // print the routing details to the console.
+          logger.groupCollapsed(`Router is responding to: ${getFriendlyURL(url)}`);
+          debugMessages.forEach(msg => {
+            if (Array.isArray(msg)) {
+              logger.log(...msg);
+            } else {
+              logger.log(msg);
+            }
+          });
+          logger.groupEnd();
+        }
+        // Wrap in try and catch in case the handle method throws a synchronous
+        // error. It should still callback to the catch handler.
+        let responsePromise;
+        try {
+          responsePromise = handler.handle({
+            url,
+            request,
+            event,
+            params
+          });
+        } catch (err) {
+          responsePromise = Promise.reject(err);
+        }
+        // Get route's catch handler, if it exists
+        const catchHandler = route && route.catchHandler;
+        if (responsePromise instanceof Promise && (this._catchHandler || catchHandler)) {
+          responsePromise = responsePromise.catch(async err => {
+            // If there's a route catch handler, process that first
+            if (catchHandler) {
+              {
+                // Still include URL here as it will be async from the console group
+                // and may not make sense without the URL
+                logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL(url)}. Falling back to route's Catch Handler.`);
+                logger.error(`Error thrown by:`, route);
+                logger.error(err);
+                logger.groupEnd();
+              }
+              try {
+                return await catchHandler.handle({
+                  url,
+                  request,
+                  event,
+                  params
+                });
+              } catch (catchErr) {
+                if (catchErr instanceof Error) {
+                  err = catchErr;
+                }
+              }
+            }
+            if (this._catchHandler) {
+              {
+                // Still include URL here as it will be async from the console group
+                // and may not make sense without the URL
+                logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL(url)}. Falling back to global Catch Handler.`);
+                logger.error(`Error thrown by:`, route);
+                logger.error(err);
+                logger.groupEnd();
+              }
+              return this._catchHandler.handle({
+                url,
+                request,
+                event
+              });
+            }
+            throw err;
+          });
+        }
+        return responsePromise;
+      }
+      /**
+       * Checks a request and URL (and optionally an event) against the list of
+       * registered routes, and if there's a match, returns the corresponding
+       * route along with any params generated by the match.
+       *
+       * @param {Object} options
+       * @param {URL} options.url
+       * @param {boolean} options.sameOrigin The result of comparing `url.origin`
+       *     against the current origin.
+       * @param {Request} options.request The request to match.
+       * @param {Event} options.event The corresponding event.
+       * @return {Object} An object with `route` and `params` properties.
+       *     They are populated if a matching route was found or `undefined`
+       *     otherwise.
+       */
+      findMatchingRoute({
+        url,
+        sameOrigin,
+        request,
+        event
+      }) {
+        const routes = this._routes.get(request.method) || [];
+        for (const route of routes) {
+          let params;
+          // route.match returns type any, not possible to change right now.
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          const matchResult = route.match({
+            url,
+            sameOrigin,
+            request,
+            event
+          });
+          if (matchResult) {
+            {
+              // Warn developers that using an async matchCallback is almost always
+              // not the right thing to do.
+              if (matchResult instanceof Promise) {
+                logger.warn(`While routing ${getFriendlyURL(url)}, an async ` + `matchCallback function was used. Please convert the ` + `following route to use a synchronous matchCallback function:`, route);
+              }
+            }
+            // See https://github.com/GoogleChrome/workbox/issues/2079
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+            params = matchResult;
+            if (Array.isArray(params) && params.length === 0) {
+              // Instead of passing an empty array in as params, use undefined.
+              params = undefined;
+            } else if (matchResult.constructor === Object &&
+            // eslint-disable-line
+            Object.keys(matchResult).length === 0) {
+              // Instead of passing an empty object in as params, use undefined.
+              params = undefined;
+            } else if (typeof matchResult === 'boolean') {
+              // For the boolean value true (rather than just something truth-y),
+              // don't set params.
+              // See https://github.com/GoogleChrome/workbox/pull/2134#issuecomment-513924353
+              params = undefined;
+            }
+            // Return early if have a match.
+            return {
+              route,
+              params
+            };
+          }
+        }
+        // If no match was found above, return and empty object.
+        return {};
+      }
+      /**
+       * Define a default `handler` that's called when no routes explicitly
+       * match the incoming request.
+       *
+       * Each HTTP method ('GET', 'POST', etc.) gets its own default handler.
+       *
+       * Without a default handler, unmatched requests will go against the
+       * network as if there were no service worker present.
+       *
+       * @param {workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       * @param {string} [method='GET'] The HTTP method to associate with this
+       * default handler. Each method has its own default.
+       */
+      setDefaultHandler(handler, method = defaultMethod) {
+        this._defaultHandlerMap.set(method, normalizeHandler(handler));
+      }
+      /**
+       * If a Route throws an error while handling a request, this `handler`
+       * will be called and given a chance to provide a response.
+       *
+       * @param {workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       */
+      setCatchHandler(handler) {
+        this._catchHandler = normalizeHandler(handler);
+      }
+      /**
+       * Registers a route with the router.
+       *
+       * @param {workbox-routing.Route} route The route to register.
+       */
+      registerRoute(route) {
+        {
+          finalAssertExports.isType(route, 'object', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          finalAssertExports.hasMethod(route, 'match', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          finalAssertExports.isType(route.handler, 'object', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          finalAssertExports.hasMethod(route.handler, 'handle', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route.handler'
+          });
+          finalAssertExports.isType(route.method, 'string', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route.method'
+          });
+        }
+        if (!this._routes.has(route.method)) {
+          this._routes.set(route.method, []);
+        }
+        // Give precedence to all of the earlier routes by adding this additional
+        // route to the end of the array.
+        this._routes.get(route.method).push(route);
+      }
+      /**
+       * Unregisters a route with the router.
+       *
+       * @param {workbox-routing.Route} route The route to unregister.
+       */
+      unregisterRoute(route) {
+        if (!this._routes.has(route.method)) {
+          throw new WorkboxError('unregister-route-but-not-found-with-method', {
+            method: route.method
+          });
+        }
+        const routeIndex = this._routes.get(route.method).indexOf(route);
+        if (routeIndex > -1) {
+          this._routes.get(route.method).splice(routeIndex, 1);
+        } else {
+          throw new WorkboxError('unregister-route-route-not-registered');
+        }
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    let defaultRouter;
+    /**
+     * Creates a new, singleton Router instance if one does not exist. If one
+     * does already exist, that instance is returned.
+     *
+     * @private
+     * @return {Router}
+     */
+    const getOrCreateDefaultRouter = () => {
+      if (!defaultRouter) {
+        defaultRouter = new Router();
+        // The helpers that use the default Router assume these listeners exist.
+        defaultRouter.addFetchListener();
+        defaultRouter.addCacheListener();
+      }
+      return defaultRouter;
+    };
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Easily register a RegExp, string, or function with a caching
+     * strategy to a singleton Router instance.
+     *
+     * This method will generate a Route for you if needed and
+     * call {@link workbox-routing.Router#registerRoute}.
+     *
+     * @param {RegExp|string|workbox-routing.Route~matchCallback|workbox-routing.Route} capture
+     * If the capture param is a `Route`, all other arguments will be ignored.
+     * @param {workbox-routing~handlerCallback} [handler] A callback
+     * function that returns a Promise resulting in a Response. This parameter
+     * is required if `capture` is not a `Route` object.
+     * @param {string} [method='GET'] The HTTP method to match the Route
+     * against.
+     * @return {workbox-routing.Route} The generated `Route`.
+     *
+     * @memberof workbox-routing
+     */
+    function registerRoute(capture, handler, method) {
+      let route;
+      if (typeof capture === 'string') {
+        const captureUrl = new URL(capture, location.href);
+        {
+          if (!(capture.startsWith('/') || capture.startsWith('http'))) {
+            throw new WorkboxError('invalid-string', {
+              moduleName: 'workbox-routing',
+              funcName: 'registerRoute',
+              paramName: 'capture'
+            });
+          }
+          // We want to check if Express-style wildcards are in the pathname only.
+          // TODO: Remove this log message in v4.
+          const valueToCheck = capture.startsWith('http') ? captureUrl.pathname : capture;
+          // See https://github.com/pillarjs/path-to-regexp#parameters
+          const wildcards = '[*:?+]';
+          if (new RegExp(`${wildcards}`).exec(valueToCheck)) {
+            logger.debug(`The '$capture' parameter contains an Express-style wildcard ` + `character (${wildcards}). Strings are now always interpreted as ` + `exact matches; use a RegExp for partial or wildcard matches.`);
+          }
+        }
+        const matchCallback = ({
+          url
+        }) => {
+          {
+            if (url.pathname === captureUrl.pathname && url.origin !== captureUrl.origin) {
+              logger.debug(`${capture} only partially matches the cross-origin URL ` + `${url.toString()}. This route will only handle cross-origin requests ` + `if they match the entire URL.`);
+            }
+          }
+          return url.href === captureUrl.href;
+        };
+        // If `capture` is a string then `handler` and `method` must be present.
+        route = new Route(matchCallback, handler, method);
+      } else if (capture instanceof RegExp) {
+        // If `capture` is a `RegExp` then `handler` and `method` must be present.
+        route = new RegExpRoute(capture, handler, method);
+      } else if (typeof capture === 'function') {
+        // If `capture` is a function then `handler` and `method` must be present.
+        route = new Route(capture, handler, method);
+      } else if (capture instanceof Route) {
+        route = capture;
+      } else {
+        throw new WorkboxError('unsupported-route-type', {
+          moduleName: 'workbox-routing',
+          funcName: 'registerRoute',
+          paramName: 'capture'
+        });
+      }
+      const defaultRouter = getOrCreateDefaultRouter();
+      defaultRouter.registerRoute(route);
+      return route;
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const _cacheNameDetails = {
+      googleAnalytics: 'googleAnalytics',
+      precache: 'precache-v2',
+      prefix: 'workbox',
+      runtime: 'runtime',
+      suffix: typeof registration !== 'undefined' ? registration.scope : ''
+    };
+    const _createCacheName = cacheName => {
+      return [_cacheNameDetails.prefix, cacheName, _cacheNameDetails.suffix].filter(value => value && value.length > 0).join('-');
+    };
+    const eachCacheNameDetail = fn => {
+      for (const key of Object.keys(_cacheNameDetails)) {
+        fn(key);
+      }
+    };
+    const cacheNames = {
+      updateDetails: details => {
+        eachCacheNameDetail(key => {
+          if (typeof details[key] === 'string') {
+            _cacheNameDetails[key] = details[key];
+          }
+        });
+      },
+      getGoogleAnalyticsName: userCacheName => {
+        return userCacheName || _createCacheName(_cacheNameDetails.googleAnalytics);
+      },
+      getPrecacheName: userCacheName => {
+        return userCacheName || _createCacheName(_cacheNameDetails.precache);
+      },
+      getPrefix: () => {
+        return _cacheNameDetails.prefix;
+      },
+      getRuntimeName: userCacheName => {
+        return userCacheName || _createCacheName(_cacheNameDetails.runtime);
+      },
+      getSuffix: () => {
+        return _cacheNameDetails.suffix;
+      }
+    };
+
+    /*
+      Copyright 2019 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A helper function that prevents a promise from being flagged as unused.
+     *
+     * @private
+     **/
+    function dontWaitFor(promise) {
+      // Effective no-op.
+      void promise.then(() => {});
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    // Callbacks to be executed whenever there's a quota error.
+    // Can't change Function type right now.
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    const quotaErrorCallbacks = new Set();
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Adds a function to the set of quotaErrorCallbacks that will be executed if
+     * there's a quota error.
+     *
+     * @param {Function} callback
+     * @memberof workbox-core
+     */
+    // Can't change Function type
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    function registerQuotaErrorCallback(callback) {
+      {
+        finalAssertExports.isType(callback, 'function', {
+          moduleName: 'workbox-core',
+          funcName: 'register',
+          paramName: 'callback'
+        });
+      }
+      quotaErrorCallbacks.add(callback);
+      {
+        logger.log('Registered a callback to respond to quota errors.', callback);
+      }
+    }
+
+    function _extends() {
+      return _extends = Object.assign ? Object.assign.bind() : function (n) {
+        for (var e = 1; e < arguments.length; e++) {
+          var t = arguments[e];
+          for (var r in t) ({}).hasOwnProperty.call(t, r) && (n[r] = t[r]);
+        }
+        return n;
+      }, _extends.apply(null, arguments);
+    }
+
+    const instanceOfAny = (object, constructors) => constructors.some(c => object instanceof c);
+    let idbProxyableTypes;
+    let cursorAdvanceMethods;
+    // This is a function to prevent it throwing up in node environments.
+    function getIdbProxyableTypes() {
+      return idbProxyableTypes || (idbProxyableTypes = [IDBDatabase, IDBObjectStore, IDBIndex, IDBCursor, IDBTransaction]);
+    }
+    // This is a function to prevent it throwing up in node environments.
+    function getCursorAdvanceMethods() {
+      return cursorAdvanceMethods || (cursorAdvanceMethods = [IDBCursor.prototype.advance, IDBCursor.prototype.continue, IDBCursor.prototype.continuePrimaryKey]);
+    }
+    const cursorRequestMap = new WeakMap();
+    const transactionDoneMap = new WeakMap();
+    const transactionStoreNamesMap = new WeakMap();
+    const transformCache = new WeakMap();
+    const reverseTransformCache = new WeakMap();
+    function promisifyRequest(request) {
+      const promise = new Promise((resolve, reject) => {
+        const unlisten = () => {
+          request.removeEventListener('success', success);
+          request.removeEventListener('error', error);
+        };
+        const success = () => {
+          resolve(wrap(request.result));
+          unlisten();
+        };
+        const error = () => {
+          reject(request.error);
+          unlisten();
+        };
+        request.addEventListener('success', success);
+        request.addEventListener('error', error);
+      });
+      promise.then(value => {
+        // Since cursoring reuses the IDBRequest (*sigh*), we cache it for later retrieval
+        // (see wrapFunction).
+        if (value instanceof IDBCursor) {
+          cursorRequestMap.set(value, request);
+        }
+        // Catching to avoid "Uncaught Promise exceptions"
+      }).catch(() => {});
+      // This mapping exists in reverseTransformCache but doesn't doesn't exist in transformCache. This
+      // is because we create many promises from a single IDBRequest.
+      reverseTransformCache.set(promise, request);
+      return promise;
+    }
+    function cacheDonePromiseForTransaction(tx) {
+      // Early bail if we've already created a done promise for this transaction.
+      if (transactionDoneMap.has(tx)) return;
+      const done = new Promise((resolve, reject) => {
+        const unlisten = () => {
+          tx.removeEventListener('complete', complete);
+          tx.removeEventListener('error', error);
+          tx.removeEventListener('abort', error);
+        };
+        const complete = () => {
+          resolve();
+          unlisten();
+        };
+        const error = () => {
+          reject(tx.error || new DOMException('AbortError', 'AbortError'));
+          unlisten();
+        };
+        tx.addEventListener('complete', complete);
+        tx.addEventListener('error', error);
+        tx.addEventListener('abort', error);
+      });
+      // Cache it for later retrieval.
+      transactionDoneMap.set(tx, done);
+    }
+    let idbProxyTraps = {
+      get(target, prop, receiver) {
+        if (target instanceof IDBTransaction) {
+          // Special handling for transaction.done.
+          if (prop === 'done') return transactionDoneMap.get(target);
+          // Polyfill for objectStoreNames because of Edge.
+          if (prop === 'objectStoreNames') {
+            return target.objectStoreNames || transactionStoreNamesMap.get(target);
+          }
+          // Make tx.store return the only store in the transaction, or undefined if there are many.
+          if (prop === 'store') {
+            return receiver.objectStoreNames[1] ? undefined : receiver.objectStore(receiver.objectStoreNames[0]);
+          }
+        }
+        // Else transform whatever we get back.
+        return wrap(target[prop]);
+      },
+      set(target, prop, value) {
+        target[prop] = value;
+        return true;
+      },
+      has(target, prop) {
+        if (target instanceof IDBTransaction && (prop === 'done' || prop === 'store')) {
+          return true;
+        }
+        return prop in target;
+      }
+    };
+    function replaceTraps(callback) {
+      idbProxyTraps = callback(idbProxyTraps);
+    }
+    function wrapFunction(func) {
+      // Due to expected object equality (which is enforced by the caching in `wrap`), we
+      // only create one new func per func.
+      // Edge doesn't support objectStoreNames (booo), so we polyfill it here.
+      if (func === IDBDatabase.prototype.transaction && !('objectStoreNames' in IDBTransaction.prototype)) {
+        return function (storeNames, ...args) {
+          const tx = func.call(unwrap(this), storeNames, ...args);
+          transactionStoreNamesMap.set(tx, storeNames.sort ? storeNames.sort() : [storeNames]);
+          return wrap(tx);
+        };
+      }
+      // Cursor methods are special, as the behaviour is a little more different to standard IDB. In
+      // IDB, you advance the cursor and wait for a new 'success' on the IDBRequest that gave you the
+      // cursor. It's kinda like a promise that can resolve with many values. That doesn't make sense
+      // with real promises, so each advance methods returns a new promise for the cursor object, or
+      // undefined if the end of the cursor has been reached.
+      if (getCursorAdvanceMethods().includes(func)) {
+        return function (...args) {
+          // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use
+          // the original object.
+          func.apply(unwrap(this), args);
+          return wrap(cursorRequestMap.get(this));
+        };
+      }
+      return function (...args) {
+        // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use
+        // the original object.
+        return wrap(func.apply(unwrap(this), args));
+      };
+    }
+    function transformCachableValue(value) {
+      if (typeof value === 'function') return wrapFunction(value);
+      // This doesn't return, it just creates a 'done' promise for the transaction,
+      // which is later returned for transaction.done (see idbObjectHandler).
+      if (value instanceof IDBTransaction) cacheDonePromiseForTransaction(value);
+      if (instanceOfAny(value, getIdbProxyableTypes())) return new Proxy(value, idbProxyTraps);
+      // Return the same value back if we're not going to transform it.
+      return value;
+    }
+    function wrap(value) {
+      // We sometimes generate multiple promises from a single IDBRequest (eg when cursoring), because
+      // IDB is weird and a single IDBRequest can yield many responses, so these can't be cached.
+      if (value instanceof IDBRequest) return promisifyRequest(value);
+      // If we've already transformed this value before, reuse the transformed value.
+      // This is faster, but it also provides object equality.
+      if (transformCache.has(value)) return transformCache.get(value);
+      const newValue = transformCachableValue(value);
+      // Not all types are transformed.
+      // These may be primitive types, so they can't be WeakMap keys.
+      if (newValue !== value) {
+        transformCache.set(value, newValue);
+        reverseTransformCache.set(newValue, value);
+      }
+      return newValue;
+    }
+    const unwrap = value => reverseTransformCache.get(value);
+
+    /**
+     * Open a database.
+     *
+     * @param name Name of the database.
+     * @param version Schema version.
+     * @param callbacks Additional callbacks.
+     */
+    function openDB(name, version, {
+      blocked,
+      upgrade,
+      blocking,
+      terminated
+    } = {}) {
+      const request = indexedDB.open(name, version);
+      const openPromise = wrap(request);
+      if (upgrade) {
+        request.addEventListener('upgradeneeded', event => {
+          upgrade(wrap(request.result), event.oldVersion, event.newVersion, wrap(request.transaction), event);
+        });
+      }
+      if (blocked) {
+        request.addEventListener('blocked', event => blocked(
+        // Casting due to https://github.com/microsoft/TypeScript-DOM-lib-generator/pull/1405
+        event.oldVersion, event.newVersion, event));
+      }
+      openPromise.then(db => {
+        if (terminated) db.addEventListener('close', () => terminated());
+        if (blocking) {
+          db.addEventListener('versionchange', event => blocking(event.oldVersion, event.newVersion, event));
+        }
+      }).catch(() => {});
+      return openPromise;
+    }
+    /**
+     * Delete a database.
+     *
+     * @param name Name of the database.
+     */
+    function deleteDB(name, {
+      blocked
+    } = {}) {
+      const request = indexedDB.deleteDatabase(name);
+      if (blocked) {
+        request.addEventListener('blocked', event => blocked(
+        // Casting due to https://github.com/microsoft/TypeScript-DOM-lib-generator/pull/1405
+        event.oldVersion, event));
+      }
+      return wrap(request).then(() => undefined);
+    }
+    const readMethods = ['get', 'getKey', 'getAll', 'getAllKeys', 'count'];
+    const writeMethods = ['put', 'add', 'delete', 'clear'];
+    const cachedMethods = new Map();
+    function getMethod(target, prop) {
+      if (!(target instanceof IDBDatabase && !(prop in target) && typeof prop === 'string')) {
+        return;
+      }
+      if (cachedMethods.get(prop)) return cachedMethods.get(prop);
+      const targetFuncName = prop.replace(/FromIndex$/, '');
+      const useIndex = prop !== targetFuncName;
+      const isWrite = writeMethods.includes(targetFuncName);
+      if (
+      // Bail if the target doesn't exist on the target. Eg, getAll isn't in Edge.
+      !(targetFuncName in (useIndex ? IDBIndex : IDBObjectStore).prototype) || !(isWrite || readMethods.includes(targetFuncName))) {
+        return;
+      }
+      const method = async function (storeName, ...args) {
+        // isWrite ? 'readwrite' : undefined gzipps better, but fails in Edge :(
+        const tx = this.transaction(storeName, isWrite ? 'readwrite' : 'readonly');
+        let target = tx.store;
+        if (useIndex) target = target.index(args.shift());
+        // Must reject if op rejects.
+        // If it's a write operation, must reject if tx.done rejects.
+        // Must reject with op rejection first.
+        // Must resolve with op value.
+        // Must handle both promises (no unhandled rejections)
+        return (await Promise.all([target[targetFuncName](...args), isWrite && tx.done]))[0];
+      };
+      cachedMethods.set(prop, method);
+      return method;
+    }
+    replaceTraps(oldTraps => _extends({}, oldTraps, {
+      get: (target, prop, receiver) => getMethod(target, prop) || oldTraps.get(target, prop, receiver),
+      has: (target, prop) => !!getMethod(target, prop) || oldTraps.has(target, prop)
+    }));
+
+    // @ts-ignore
+    try {
+      self['workbox:expiration:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const DB_NAME = 'workbox-expiration';
+    const CACHE_OBJECT_STORE = 'cache-entries';
+    const normalizeURL = unNormalizedUrl => {
+      const url = new URL(unNormalizedUrl, location.href);
+      url.hash = '';
+      return url.href;
+    };
+    /**
+     * Returns the timestamp model.
+     *
+     * @private
+     */
+    class CacheTimestampsModel {
+      /**
+       *
+       * @param {string} cacheName
+       *
+       * @private
+       */
+      constructor(cacheName) {
+        this._db = null;
+        this._cacheName = cacheName;
+      }
+      /**
+       * Performs an upgrade of indexedDB.
+       *
+       * @param {IDBPDatabase<CacheDbSchema>} db
+       *
+       * @private
+       */
+      _upgradeDb(db) {
+        // TODO(philipwalton): EdgeHTML doesn't support arrays as a keyPath, so we
+        // have to use the `id` keyPath here and create our own values (a
+        // concatenation of `url + cacheName`) instead of simply using
+        // `keyPath: ['url', 'cacheName']`, which is supported in other browsers.
+        const objStore = db.createObjectStore(CACHE_OBJECT_STORE, {
+          keyPath: 'id'
+        });
+        // TODO(philipwalton): once we don't have to support EdgeHTML, we can
+        // create a single index with the keyPath `['cacheName', 'timestamp']`
+        // instead of doing both these indexes.
+        objStore.createIndex('cacheName', 'cacheName', {
+          unique: false
+        });
+        objStore.createIndex('timestamp', 'timestamp', {
+          unique: false
+        });
+      }
+      /**
+       * Performs an upgrade of indexedDB and deletes deprecated DBs.
+       *
+       * @param {IDBPDatabase<CacheDbSchema>} db
+       *
+       * @private
+       */
+      _upgradeDbAndDeleteOldDbs(db) {
+        this._upgradeDb(db);
+        if (this._cacheName) {
+          void deleteDB(this._cacheName);
+        }
+      }
+      /**
+       * @param {string} url
+       * @param {number} timestamp
+       *
+       * @private
+       */
+      async setTimestamp(url, timestamp) {
+        url = normalizeURL(url);
+        const entry = {
+          url,
+          timestamp,
+          cacheName: this._cacheName,
+          // Creating an ID from the URL and cache name won't be necessary once
+          // Edge switches to Chromium and all browsers we support work with
+          // array keyPaths.
+          id: this._getId(url)
+        };
+        const db = await this.getDb();
+        const tx = db.transaction(CACHE_OBJECT_STORE, 'readwrite', {
+          durability: 'relaxed'
+        });
+        await tx.store.put(entry);
+        await tx.done;
+      }
+      /**
+       * Returns the timestamp stored for a given URL.
+       *
+       * @param {string} url
+       * @return {number | undefined}
+       *
+       * @private
+       */
+      async getTimestamp(url) {
+        const db = await this.getDb();
+        const entry = await db.get(CACHE_OBJECT_STORE, this._getId(url));
+        return entry === null || entry === void 0 ? void 0 : entry.timestamp;
+      }
+      /**
+       * Iterates through all the entries in the object store (from newest to
+       * oldest) and removes entries once either `maxCount` is reached or the
+       * entry's timestamp is less than `minTimestamp`.
+       *
+       * @param {number} minTimestamp
+       * @param {number} maxCount
+       * @return {Array<string>}
+       *
+       * @private
+       */
+      async expireEntries(minTimestamp, maxCount) {
+        const db = await this.getDb();
+        let cursor = await db.transaction(CACHE_OBJECT_STORE).store.index('timestamp').openCursor(null, 'prev');
+        const entriesToDelete = [];
+        let entriesNotDeletedCount = 0;
+        while (cursor) {
+          const result = cursor.value;
+          // TODO(philipwalton): once we can use a multi-key index, we
+          // won't have to check `cacheName` here.
+          if (result.cacheName === this._cacheName) {
+            // Delete an entry if it's older than the max age or
+            // if we already have the max number allowed.
+            if (minTimestamp && result.timestamp < minTimestamp || maxCount && entriesNotDeletedCount >= maxCount) {
+              // TODO(philipwalton): we should be able to delete the
+              // entry right here, but doing so causes an iteration
+              // bug in Safari stable (fixed in TP). Instead we can
+              // store the keys of the entries to delete, and then
+              // delete the separate transactions.
+              // https://github.com/GoogleChrome/workbox/issues/1978
+              // cursor.delete();
+              // We only need to return the URL, not the whole entry.
+              entriesToDelete.push(cursor.value);
+            } else {
+              entriesNotDeletedCount++;
+            }
+          }
+          cursor = await cursor.continue();
+        }
+        // TODO(philipwalton): once the Safari bug in the following issue is fixed,
+        // we should be able to remove this loop and do the entry deletion in the
+        // cursor loop above:
+        // https://github.com/GoogleChrome/workbox/issues/1978
+        const urlsDeleted = [];
+        for (const entry of entriesToDelete) {
+          await db.delete(CACHE_OBJECT_STORE, entry.id);
+          urlsDeleted.push(entry.url);
+        }
+        return urlsDeleted;
+      }
+      /**
+       * Takes a URL and returns an ID that will be unique in the object store.
+       *
+       * @param {string} url
+       * @return {string}
+       *
+       * @private
+       */
+      _getId(url) {
+        // Creating an ID from the URL and cache name won't be necessary once
+        // Edge switches to Chromium and all browsers we support work with
+        // array keyPaths.
+        return this._cacheName + '|' + normalizeURL(url);
+      }
+      /**
+       * Returns an open connection to the database.
+       *
+       * @private
+       */
+      async getDb() {
+        if (!this._db) {
+          this._db = await openDB(DB_NAME, 1, {
+            upgrade: this._upgradeDbAndDeleteOldDbs.bind(this)
+          });
+        }
+        return this._db;
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * The `CacheExpiration` class allows you define an expiration and / or
+     * limit on the number of responses stored in a
+     * [`Cache`](https://developer.mozilla.org/en-US/docs/Web/API/Cache).
+     *
+     * @memberof workbox-expiration
+     */
+    class CacheExpiration {
+      /**
+       * To construct a new CacheExpiration instance you must provide at least
+       * one of the `config` properties.
+       *
+       * @param {string} cacheName Name of the cache to apply restrictions to.
+       * @param {Object} config
+       * @param {number} [config.maxEntries] The maximum number of entries to cache.
+       * Entries used the least will be removed as the maximum is reached.
+       * @param {number} [config.maxAgeSeconds] The maximum age of an entry before
+       * it's treated as stale and removed.
+       * @param {Object} [config.matchOptions] The [`CacheQueryOptions`](https://developer.mozilla.org/en-US/docs/Web/API/Cache/delete#Parameters)
+       * that will be used when calling `delete()` on the cache.
+       */
+      constructor(cacheName, config = {}) {
+        this._isRunning = false;
+        this._rerunRequested = false;
+        {
+          finalAssertExports.isType(cacheName, 'string', {
+            moduleName: 'workbox-expiration',
+            className: 'CacheExpiration',
+            funcName: 'constructor',
+            paramName: 'cacheName'
+          });
+          if (!(config.maxEntries || config.maxAgeSeconds)) {
+            throw new WorkboxError('max-entries-or-age-required', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor'
+            });
+          }
+          if (config.maxEntries) {
+            finalAssertExports.isType(config.maxEntries, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor',
+              paramName: 'config.maxEntries'
+            });
+          }
+          if (config.maxAgeSeconds) {
+            finalAssertExports.isType(config.maxAgeSeconds, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor',
+              paramName: 'config.maxAgeSeconds'
+            });
+          }
+        }
+        this._maxEntries = config.maxEntries;
+        this._maxAgeSeconds = config.maxAgeSeconds;
+        this._matchOptions = config.matchOptions;
+        this._cacheName = cacheName;
+        this._timestampModel = new CacheTimestampsModel(cacheName);
+      }
+      /**
+       * Expires entries for the given cache and given criteria.
+       */
+      async expireEntries() {
+        if (this._isRunning) {
+          this._rerunRequested = true;
+          return;
+        }
+        this._isRunning = true;
+        const minTimestamp = this._maxAgeSeconds ? Date.now() - this._maxAgeSeconds * 1000 : 0;
+        const urlsExpired = await this._timestampModel.expireEntries(minTimestamp, this._maxEntries);
+        // Delete URLs from the cache
+        const cache = await self.caches.open(this._cacheName);
+        for (const url of urlsExpired) {
+          await cache.delete(url, this._matchOptions);
+        }
+        {
+          if (urlsExpired.length > 0) {
+            logger.groupCollapsed(`Expired ${urlsExpired.length} ` + `${urlsExpired.length === 1 ? 'entry' : 'entries'} and removed ` + `${urlsExpired.length === 1 ? 'it' : 'them'} from the ` + `'${this._cacheName}' cache.`);
+            logger.log(`Expired the following ${urlsExpired.length === 1 ? 'URL' : 'URLs'}:`);
+            urlsExpired.forEach(url => logger.log(`    ${url}`));
+            logger.groupEnd();
+          } else {
+            logger.debug(`Cache expiration ran and found no entries to remove.`);
+          }
+        }
+        this._isRunning = false;
+        if (this._rerunRequested) {
+          this._rerunRequested = false;
+          dontWaitFor(this.expireEntries());
+        }
+      }
+      /**
+       * Update the timestamp for the given URL. This ensures the when
+       * removing entries based on maximum entries, most recently used
+       * is accurate or when expiring, the timestamp is up-to-date.
+       *
+       * @param {string} url
+       */
+      async updateTimestamp(url) {
+        {
+          finalAssertExports.isType(url, 'string', {
+            moduleName: 'workbox-expiration',
+            className: 'CacheExpiration',
+            funcName: 'updateTimestamp',
+            paramName: 'url'
+          });
+        }
+        await this._timestampModel.setTimestamp(url, Date.now());
+      }
+      /**
+       * Can be used to check if a URL has expired or not before it's used.
+       *
+       * This requires a look up from IndexedDB, so can be slow.
+       *
+       * Note: This method will not remove the cached entry, call
+       * `expireEntries()` to remove indexedDB and Cache entries.
+       *
+       * @param {string} url
+       * @return {boolean}
+       */
+      async isURLExpired(url) {
+        if (!this._maxAgeSeconds) {
+          {
+            throw new WorkboxError(`expired-test-without-max-age`, {
+              methodName: 'isURLExpired',
+              paramName: 'maxAgeSeconds'
+            });
+          }
+        } else {
+          const timestamp = await this._timestampModel.getTimestamp(url);
+          const expireOlderThan = Date.now() - this._maxAgeSeconds * 1000;
+          return timestamp !== undefined ? timestamp < expireOlderThan : true;
+        }
+      }
+      /**
+       * Removes the IndexedDB object store used to keep track of cache expiration
+       * metadata.
+       */
+      async delete() {
+        // Make sure we don't attempt another rerun if we're called in the middle of
+        // a cache expiration.
+        this._rerunRequested = false;
+        await this._timestampModel.expireEntries(Infinity); // Expires all.
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * This plugin can be used in a `workbox-strategy` to regularly enforce a
+     * limit on the age and / or the number of cached requests.
+     *
+     * It can only be used with `workbox-strategy` instances that have a
+     * [custom `cacheName` property set](/web/tools/workbox/guides/configure-workbox#custom_cache_names_in_strategies).
+     * In other words, it can't be used to expire entries in strategy that uses the
+     * default runtime cache name.
+     *
+     * Whenever a cached response is used or updated, this plugin will look
+     * at the associated cache and remove any old or extra responses.
+     *
+     * When using `maxAgeSeconds`, responses may be used *once* after expiring
+     * because the expiration clean up will not have occurred until *after* the
+     * cached response has been used. If the response has a "Date" header, then
+     * a light weight expiration check is performed and the response will not be
+     * used immediately.
+     *
+     * When using `maxEntries`, the entry least-recently requested will be removed
+     * from the cache first.
+     *
+     * @memberof workbox-expiration
+     */
+    class ExpirationPlugin {
+      /**
+       * @param {ExpirationPluginOptions} config
+       * @param {number} [config.maxEntries] The maximum number of entries to cache.
+       * Entries used the least will be removed as the maximum is reached.
+       * @param {number} [config.maxAgeSeconds] The maximum age of an entry before
+       * it's treated as stale and removed.
+       * @param {Object} [config.matchOptions] The [`CacheQueryOptions`](https://developer.mozilla.org/en-US/docs/Web/API/Cache/delete#Parameters)
+       * that will be used when calling `delete()` on the cache.
+       * @param {boolean} [config.purgeOnQuotaError] Whether to opt this cache in to
+       * automatic deletion if the available storage quota has been exceeded.
+       */
+      constructor(config = {}) {
+        /**
+         * A "lifecycle" callback that will be triggered automatically by the
+         * `workbox-strategies` handlers when a `Response` is about to be returned
+         * from a [Cache](https://developer.mozilla.org/en-US/docs/Web/API/Cache) to
+         * the handler. It allows the `Response` to be inspected for freshness and
+         * prevents it from being used if the `Response`'s `Date` header value is
+         * older than the configured `maxAgeSeconds`.
+         *
+         * @param {Object} options
+         * @param {string} options.cacheName Name of the cache the response is in.
+         * @param {Response} options.cachedResponse The `Response` object that's been
+         *     read from a cache and whose freshness should be checked.
+         * @return {Response} Either the `cachedResponse`, if it's
+         *     fresh, or `null` if the `Response` is older than `maxAgeSeconds`.
+         *
+         * @private
+         */
+        this.cachedResponseWillBeUsed = async ({
+          event,
+          request,
+          cacheName,
+          cachedResponse
+        }) => {
+          if (!cachedResponse) {
+            return null;
+          }
+          const isFresh = this._isResponseDateFresh(cachedResponse);
+          // Expire entries to ensure that even if the expiration date has
+          // expired, it'll only be used once.
+          const cacheExpiration = this._getCacheExpiration(cacheName);
+          dontWaitFor(cacheExpiration.expireEntries());
+          // Update the metadata for the request URL to the current timestamp,
+          // but don't `await` it as we don't want to block the response.
+          const updateTimestampDone = cacheExpiration.updateTimestamp(request.url);
+          if (event) {
+            try {
+              event.waitUntil(updateTimestampDone);
+            } catch (error) {
+              {
+                // The event may not be a fetch event; only log the URL if it is.
+                if ('request' in event) {
+                  logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache entry for ` + `'${getFriendlyURL(event.request.url)}'.`);
+                }
+              }
+            }
+          }
+          return isFresh ? cachedResponse : null;
+        };
+        /**
+         * A "lifecycle" callback that will be triggered automatically by the
+         * `workbox-strategies` handlers when an entry is added to a cache.
+         *
+         * @param {Object} options
+         * @param {string} options.cacheName Name of the cache that was updated.
+         * @param {string} options.request The Request for the cached entry.
+         *
+         * @private
+         */
+        this.cacheDidUpdate = async ({
+          cacheName,
+          request
+        }) => {
+          {
+            finalAssertExports.isType(cacheName, 'string', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'cacheDidUpdate',
+              paramName: 'cacheName'
+            });
+            finalAssertExports.isInstance(request, Request, {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'cacheDidUpdate',
+              paramName: 'request'
+            });
+          }
+          const cacheExpiration = this._getCacheExpiration(cacheName);
+          await cacheExpiration.updateTimestamp(request.url);
+          await cacheExpiration.expireEntries();
+        };
+        {
+          if (!(config.maxEntries || config.maxAgeSeconds)) {
+            throw new WorkboxError('max-entries-or-age-required', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor'
+            });
+          }
+          if (config.maxEntries) {
+            finalAssertExports.isType(config.maxEntries, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor',
+              paramName: 'config.maxEntries'
+            });
+          }
+          if (config.maxAgeSeconds) {
+            finalAssertExports.isType(config.maxAgeSeconds, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor',
+              paramName: 'config.maxAgeSeconds'
+            });
+          }
+        }
+        this._config = config;
+        this._maxAgeSeconds = config.maxAgeSeconds;
+        this._cacheExpirations = new Map();
+        if (config.purgeOnQuotaError) {
+          registerQuotaErrorCallback(() => this.deleteCacheAndMetadata());
+        }
+      }
+      /**
+       * A simple helper method to return a CacheExpiration instance for a given
+       * cache name.
+       *
+       * @param {string} cacheName
+       * @return {CacheExpiration}
+       *
+       * @private
+       */
+      _getCacheExpiration(cacheName) {
+        if (cacheName === cacheNames.getRuntimeName()) {
+          throw new WorkboxError('expire-custom-caches-only');
+        }
+        let cacheExpiration = this._cacheExpirations.get(cacheName);
+        if (!cacheExpiration) {
+          cacheExpiration = new CacheExpiration(cacheName, this._config);
+          this._cacheExpirations.set(cacheName, cacheExpiration);
+        }
+        return cacheExpiration;
+      }
+      /**
+       * @param {Response} cachedResponse
+       * @return {boolean}
+       *
+       * @private
+       */
+      _isResponseDateFresh(cachedResponse) {
+        if (!this._maxAgeSeconds) {
+          // We aren't expiring by age, so return true, it's fresh
+          return true;
+        }
+        // Check if the 'date' header will suffice a quick expiration check.
+        // See https://github.com/GoogleChromeLabs/sw-toolbox/issues/164 for
+        // discussion.
+        const dateHeaderTimestamp = this._getDateHeaderTimestamp(cachedResponse);
+        if (dateHeaderTimestamp === null) {
+          // Unable to parse date, so assume it's fresh.
+          return true;
+        }
+        // If we have a valid headerTime, then our response is fresh iff the
+        // headerTime plus maxAgeSeconds is greater than the current time.
+        const now = Date.now();
+        return dateHeaderTimestamp >= now - this._maxAgeSeconds * 1000;
+      }
+      /**
+       * This method will extract the data header and parse it into a useful
+       * value.
+       *
+       * @param {Response} cachedResponse
+       * @return {number|null}
+       *
+       * @private
+       */
+      _getDateHeaderTimestamp(cachedResponse) {
+        if (!cachedResponse.headers.has('date')) {
+          return null;
+        }
+        const dateHeader = cachedResponse.headers.get('date');
+        const parsedDate = new Date(dateHeader);
+        const headerTime = parsedDate.getTime();
+        // If the Date header was invalid for some reason, parsedDate.getTime()
+        // will return NaN.
+        if (isNaN(headerTime)) {
+          return null;
+        }
+        return headerTime;
+      }
+      /**
+       * This is a helper method that performs two operations:
+       *
+       * - Deletes *all* the underlying Cache instances associated with this plugin
+       * instance, by calling caches.delete() on your behalf.
+       * - Deletes the metadata from IndexedDB used to keep track of expiration
+       * details for each Cache instance.
+       *
+       * When using cache expiration, calling this method is preferable to calling
+       * `caches.delete()` directly, since this will ensure that the IndexedDB
+       * metadata is also cleanly removed and open IndexedDB instances are deleted.
+       *
+       * Note that if you're *not* using cache expiration for a given cache, calling
+       * `caches.delete()` and passing in the cache's name should be sufficient.
+       * There is no Workbox-specific method needed for cleanup in that case.
+       */
+      async deleteCacheAndMetadata() {
+        // Do this one at a time instead of all at once via `Promise.all()` to
+        // reduce the chance of inconsistency if a promise rejects.
+        for (const [cacheName, cacheExpiration] of this._cacheExpirations) {
+          await self.caches.delete(cacheName);
+          await cacheExpiration.delete();
+        }
+        // Reset this._cacheExpirations to its initial state.
+        this._cacheExpirations = new Map();
+      }
+    }
+
+    // @ts-ignore
+    try {
+      self['workbox:cacheable-response:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * This class allows you to set up rules determining what
+     * status codes and/or headers need to be present in order for a
+     * [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response)
+     * to be considered cacheable.
+     *
+     * @memberof workbox-cacheable-response
+     */
+    class CacheableResponse {
+      /**
+       * To construct a new CacheableResponse instance you must provide at least
+       * one of the `config` properties.
+       *
+       * If both `statuses` and `headers` are specified, then both conditions must
+       * be met for the `Response` to be considered cacheable.
+       *
+       * @param {Object} config
+       * @param {Array<number>} [config.statuses] One or more status codes that a
+       * `Response` can have and be considered cacheable.
+       * @param {Object<string,string>} [config.headers] A mapping of header names
+       * and expected values that a `Response` can have and be considered cacheable.
+       * If multiple headers are provided, only one needs to be present.
+       */
+      constructor(config = {}) {
+        {
+          if (!(config.statuses || config.headers)) {
+            throw new WorkboxError('statuses-or-headers-required', {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor'
+            });
+          }
+          if (config.statuses) {
+            finalAssertExports.isArray(config.statuses, {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor',
+              paramName: 'config.statuses'
+            });
+          }
+          if (config.headers) {
+            finalAssertExports.isType(config.headers, 'object', {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor',
+              paramName: 'config.headers'
+            });
+          }
+        }
+        this._statuses = config.statuses;
+        this._headers = config.headers;
+      }
+      /**
+       * Checks a response to see whether it's cacheable or not, based on this
+       * object's configuration.
+       *
+       * @param {Response} response The response whose cacheability is being
+       * checked.
+       * @return {boolean} `true` if the `Response` is cacheable, and `false`
+       * otherwise.
+       */
+      isResponseCacheable(response) {
+        {
+          finalAssertExports.isInstance(response, Response, {
+            moduleName: 'workbox-cacheable-response',
+            className: 'CacheableResponse',
+            funcName: 'isResponseCacheable',
+            paramName: 'response'
+          });
+        }
+        let cacheable = true;
+        if (this._statuses) {
+          cacheable = this._statuses.includes(response.status);
+        }
+        if (this._headers && cacheable) {
+          cacheable = Object.keys(this._headers).some(headerName => {
+            return response.headers.get(headerName) === this._headers[headerName];
+          });
+        }
+        {
+          if (!cacheable) {
+            logger.groupCollapsed(`The request for ` + `'${getFriendlyURL(response.url)}' returned a response that does ` + `not meet the criteria for being cached.`);
+            logger.groupCollapsed(`View cacheability criteria here.`);
+            logger.log(`Cacheable statuses: ` + JSON.stringify(this._statuses));
+            logger.log(`Cacheable headers: ` + JSON.stringify(this._headers, null, 2));
+            logger.groupEnd();
+            const logFriendlyHeaders = {};
+            response.headers.forEach((value, key) => {
+              logFriendlyHeaders[key] = value;
+            });
+            logger.groupCollapsed(`View response status and headers here.`);
+            logger.log(`Response status: ${response.status}`);
+            logger.log(`Response headers: ` + JSON.stringify(logFriendlyHeaders, null, 2));
+            logger.groupEnd();
+            logger.groupCollapsed(`View full response details here.`);
+            logger.log(response.headers);
+            logger.log(response);
+            logger.groupEnd();
+            logger.groupEnd();
+          }
+        }
+        return cacheable;
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A class implementing the `cacheWillUpdate` lifecycle callback. This makes it
+     * easier to add in cacheability checks to requests made via Workbox's built-in
+     * strategies.
+     *
+     * @memberof workbox-cacheable-response
+     */
+    class CacheableResponsePlugin {
+      /**
+       * To construct a new CacheableResponsePlugin instance you must provide at
+       * least one of the `config` properties.
+       *
+       * If both `statuses` and `headers` are specified, then both conditions must
+       * be met for the `Response` to be considered cacheable.
+       *
+       * @param {Object} config
+       * @param {Array<number>} [config.statuses] One or more status codes that a
+       * `Response` can have and be considered cacheable.
+       * @param {Object<string,string>} [config.headers] A mapping of header names
+       * and expected values that a `Response` can have and be considered cacheable.
+       * If multiple headers are provided, only one needs to be present.
+       */
+      constructor(config) {
+        /**
+         * @param {Object} options
+         * @param {Response} options.response
+         * @return {Response|null}
+         * @private
+         */
+        this.cacheWillUpdate = async ({
+          response
+        }) => {
+          if (this._cacheableResponse.isResponseCacheable(response)) {
+            return response;
+          }
+          return null;
+        };
+        this._cacheableResponse = new CacheableResponse(config);
+      }
+    }
+
+    // @ts-ignore
+    try {
+      self['workbox:strategies:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const cacheOkAndOpaquePlugin = {
+      /**
+       * Returns a valid response (to allow caching) if the status is 200 (OK) or
+       * 0 (opaque).
+       *
+       * @param {Object} options
+       * @param {Response} options.response
+       * @return {Response|null}
+       *
+       * @private
+       */
+      cacheWillUpdate: async ({
+        response
+      }) => {
+        if (response.status === 200 || response.status === 0) {
+          return response;
+        }
+        return null;
+      }
+    };
+
+    /*
+      Copyright 2020 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    function stripParams(fullURL, ignoreParams) {
+      const strippedURL = new URL(fullURL);
+      for (const param of ignoreParams) {
+        strippedURL.searchParams.delete(param);
+      }
+      return strippedURL.href;
+    }
+    /**
+     * Matches an item in the cache, ignoring specific URL params. This is similar
+     * to the `ignoreSearch` option, but it allows you to ignore just specific
+     * params (while continuing to match on the others).
+     *
+     * @private
+     * @param {Cache} cache
+     * @param {Request} request
+     * @param {Object} matchOptions
+     * @param {Array<string>} ignoreParams
+     * @return {Promise<Response|undefined>}
+     */
+    async function cacheMatchIgnoreParams(cache, request, ignoreParams, matchOptions) {
+      const strippedRequestURL = stripParams(request.url, ignoreParams);
+      // If the request doesn't include any ignored params, match as normal.
+      if (request.url === strippedRequestURL) {
+        return cache.match(request, matchOptions);
+      }
+      // Otherwise, match by comparing keys
+      const keysOptions = Object.assign(Object.assign({}, matchOptions), {
+        ignoreSearch: true
+      });
+      const cacheKeys = await cache.keys(request, keysOptions);
+      for (const cacheKey of cacheKeys) {
+        const strippedCacheKeyURL = stripParams(cacheKey.url, ignoreParams);
+        if (strippedRequestURL === strippedCacheKeyURL) {
+          return cache.match(cacheKey, matchOptions);
+        }
+      }
+      return;
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * The Deferred class composes Promises in a way that allows for them to be
+     * resolved or rejected from outside the constructor. In most cases promises
+     * should be used directly, but Deferreds can be necessary when the logic to
+     * resolve a promise must be separate.
+     *
+     * @private
+     */
+    class Deferred {
+      /**
+       * Creates a promise and exposes its resolve and reject functions as methods.
+       */
+      constructor() {
+        this.promise = new Promise((resolve, reject) => {
+          this.resolve = resolve;
+          this.reject = reject;
+        });
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Runs all of the callback functions, one at a time sequentially, in the order
+     * in which they were registered.
+     *
+     * @memberof workbox-core
+     * @private
+     */
+    async function executeQuotaErrorCallbacks() {
+      {
+        logger.log(`About to run ${quotaErrorCallbacks.size} ` + `callbacks to clean up caches.`);
+      }
+      for (const callback of quotaErrorCallbacks) {
+        await callback();
+        {
+          logger.log(callback, 'is complete.');
+        }
+      }
+      {
+        logger.log('Finished running callbacks.');
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Returns a promise that resolves and the passed number of milliseconds.
+     * This utility is an async/await-friendly version of `setTimeout`.
+     *
+     * @param {number} ms
+     * @return {Promise}
+     * @private
+     */
+    function timeout(ms) {
+      return new Promise(resolve => setTimeout(resolve, ms));
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    function toRequest(input) {
+      return typeof input === 'string' ? new Request(input) : input;
+    }
+    /**
+     * A class created every time a Strategy instance calls
+     * {@link workbox-strategies.Strategy~handle} or
+     * {@link workbox-strategies.Strategy~handleAll} that wraps all fetch and
+     * cache actions around plugin callbacks and keeps track of when the strategy
+     * is "done" (i.e. all added `event.waitUntil()` promises have resolved).
+     *
+     * @memberof workbox-strategies
+     */
+    class StrategyHandler {
+      /**
+       * Creates a new instance associated with the passed strategy and event
+       * that's handling the request.
+       *
+       * The constructor also initializes the state that will be passed to each of
+       * the plugins handling this request.
+       *
+       * @param {workbox-strategies.Strategy} strategy
+       * @param {Object} options
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {ExtendableEvent} options.event The event associated with the
+       *     request.
+       * @param {URL} [options.url]
+       * @param {*} [options.params] The return value from the
+       *     {@link workbox-routing~matchCallback} (if applicable).
+       */
+      constructor(strategy, options) {
+        this._cacheKeys = {};
+        /**
+         * The request the strategy is performing (passed to the strategy's
+         * `handle()` or `handleAll()` method).
+         * @name request
+         * @instance
+         * @type {Request}
+         * @memberof workbox-strategies.StrategyHandler
+         */
+        /**
+         * The event associated with this request.
+         * @name event
+         * @instance
+         * @type {ExtendableEvent}
+         * @memberof workbox-strategies.StrategyHandler
+         */
+        /**
+         * A `URL` instance of `request.url` (if passed to the strategy's
+         * `handle()` or `handleAll()` method).
+         * Note: the `url` param will be present if the strategy was invoked
+         * from a workbox `Route` object.
+         * @name url
+         * @instance
+         * @type {URL|undefined}
+         * @memberof workbox-strategies.StrategyHandler
+         */
+        /**
+         * A `param` value (if passed to the strategy's
+         * `handle()` or `handleAll()` method).
+         * Note: the `param` param will be present if the strategy was invoked
+         * from a workbox `Route` object and the
+         * {@link workbox-routing~matchCallback} returned
+         * a truthy value (it will be that value).
+         * @name params
+         * @instance
+         * @type {*|undefined}
+         * @memberof workbox-strategies.StrategyHandler
+         */
+        {
+          finalAssertExports.isInstance(options.event, ExtendableEvent, {
+            moduleName: 'workbox-strategies',
+            className: 'StrategyHandler',
+            funcName: 'constructor',
+            paramName: 'options.event'
+          });
+        }
+        Object.assign(this, options);
+        this.event = options.event;
+        this._strategy = strategy;
+        this._handlerDeferred = new Deferred();
+        this._extendLifetimePromises = [];
+        // Copy the plugins list (since it's mutable on the strategy),
+        // so any mutations don't affect this handler instance.
+        this._plugins = [...strategy.plugins];
+        this._pluginStateMap = new Map();
+        for (const plugin of this._plugins) {
+          this._pluginStateMap.set(plugin, {});
+        }
+        this.event.waitUntil(this._handlerDeferred.promise);
+      }
+      /**
+       * Fetches a given request (and invokes any applicable plugin callback
+       * methods) using the `fetchOptions` (for non-navigation requests) and
+       * `plugins` defined on the `Strategy` object.
+       *
+       * The following plugin lifecycle methods are invoked when using this method:
+       * - `requestWillFetch()`
+       * - `fetchDidSucceed()`
+       * - `fetchDidFail()`
+       *
+       * @param {Request|string} input The URL or request to fetch.
+       * @return {Promise<Response>}
+       */
+      async fetch(input) {
+        const {
+          event
+        } = this;
+        let request = toRequest(input);
+        if (request.mode === 'navigate' && event instanceof FetchEvent && event.preloadResponse) {
+          const possiblePreloadResponse = await event.preloadResponse;
+          if (possiblePreloadResponse) {
+            {
+              logger.log(`Using a preloaded navigation response for ` + `'${getFriendlyURL(request.url)}'`);
+            }
+            return possiblePreloadResponse;
+          }
+        }
+        // If there is a fetchDidFail plugin, we need to save a clone of the
+        // original request before it's either modified by a requestWillFetch
+        // plugin or before the original request's body is consumed via fetch().
+        const originalRequest = this.hasCallback('fetchDidFail') ? request.clone() : null;
+        try {
+          for (const cb of this.iterateCallbacks('requestWillFetch')) {
+            request = await cb({
+              request: request.clone(),
+              event
+            });
+          }
+        } catch (err) {
+          if (err instanceof Error) {
+            throw new WorkboxError('plugin-error-request-will-fetch', {
+              thrownErrorMessage: err.message
+            });
+          }
+        }
+        // The request can be altered by plugins with `requestWillFetch` making
+        // the original request (most likely from a `fetch` event) different
+        // from the Request we make. Pass both to `fetchDidFail` to aid debugging.
+        const pluginFilteredRequest = request.clone();
+        try {
+          let fetchResponse;
+          // See https://github.com/GoogleChrome/workbox/issues/1796
+          fetchResponse = await fetch(request, request.mode === 'navigate' ? undefined : this._strategy.fetchOptions);
+          if ("development" !== 'production') {
+            logger.debug(`Network request for ` + `'${getFriendlyURL(request.url)}' returned a response with ` + `status '${fetchResponse.status}'.`);
+          }
+          for (const callback of this.iterateCallbacks('fetchDidSucceed')) {
+            fetchResponse = await callback({
+              event,
+              request: pluginFilteredRequest,
+              response: fetchResponse
+            });
+          }
+          return fetchResponse;
+        } catch (error) {
+          {
+            logger.log(`Network request for ` + `'${getFriendlyURL(request.url)}' threw an error.`, error);
+          }
+          // `originalRequest` will only exist if a `fetchDidFail` callback
+          // is being used (see above).
+          if (originalRequest) {
+            await this.runCallbacks('fetchDidFail', {
+              error: error,
+              event,
+              originalRequest: originalRequest.clone(),
+              request: pluginFilteredRequest.clone()
+            });
+          }
+          throw error;
+        }
+      }
+      /**
+       * Calls `this.fetch()` and (in the background) runs `this.cachePut()` on
+       * the response generated by `this.fetch()`.
+       *
+       * The call to `this.cachePut()` automatically invokes `this.waitUntil()`,
+       * so you do not have to manually call `waitUntil()` on the event.
+       *
+       * @param {Request|string} input The request or URL to fetch and cache.
+       * @return {Promise<Response>}
+       */
+      async fetchAndCachePut(input) {
+        const response = await this.fetch(input);
+        const responseClone = response.clone();
+        void this.waitUntil(this.cachePut(input, responseClone));
+        return response;
+      }
+      /**
+       * Matches a request from the cache (and invokes any applicable plugin
+       * callback methods) using the `cacheName`, `matchOptions`, and `plugins`
+       * defined on the strategy object.
+       *
+       * The following plugin lifecycle methods are invoked when using this method:
+       * - cacheKeyWillBeUsed()
+       * - cachedResponseWillBeUsed()
+       *
+       * @param {Request|string} key The Request or URL to use as the cache key.
+       * @return {Promise<Response|undefined>} A matching response, if found.
+       */
+      async cacheMatch(key) {
+        const request = toRequest(key);
+        let cachedResponse;
+        const {
+          cacheName,
+          matchOptions
+        } = this._strategy;
+        const effectiveRequest = await this.getCacheKey(request, 'read');
+        const multiMatchOptions = Object.assign(Object.assign({}, matchOptions), {
+          cacheName
+        });
+        cachedResponse = await caches.match(effectiveRequest, multiMatchOptions);
+        {
+          if (cachedResponse) {
+            logger.debug(`Found a cached response in '${cacheName}'.`);
+          } else {
+            logger.debug(`No cached response found in '${cacheName}'.`);
+          }
+        }
+        for (const callback of this.iterateCallbacks('cachedResponseWillBeUsed')) {
+          cachedResponse = (await callback({
+            cacheName,
+            matchOptions,
+            cachedResponse,
+            request: effectiveRequest,
+            event: this.event
+          })) || undefined;
+        }
+        return cachedResponse;
+      }
+      /**
+       * Puts a request/response pair in the cache (and invokes any applicable
+       * plugin callback methods) using the `cacheName` and `plugins` defined on
+       * the strategy object.
+       *
+       * The following plugin lifecycle methods are invoked when using this method:
+       * - cacheKeyWillBeUsed()
+       * - cacheWillUpdate()
+       * - cacheDidUpdate()
+       *
+       * @param {Request|string} key The request or URL to use as the cache key.
+       * @param {Response} response The response to cache.
+       * @return {Promise<boolean>} `false` if a cacheWillUpdate caused the response
+       * not be cached, and `true` otherwise.
+       */
+      async cachePut(key, response) {
+        const request = toRequest(key);
+        // Run in the next task to avoid blocking other cache reads.
+        // https://github.com/w3c/ServiceWorker/issues/1397
+        await timeout(0);
+        const effectiveRequest = await this.getCacheKey(request, 'write');
+        {
+          if (effectiveRequest.method && effectiveRequest.method !== 'GET') {
+            throw new WorkboxError('attempt-to-cache-non-get-request', {
+              url: getFriendlyURL(effectiveRequest.url),
+              method: effectiveRequest.method
+            });
+          }
+          // See https://github.com/GoogleChrome/workbox/issues/2818
+          const vary = response.headers.get('Vary');
+          if (vary) {
+            logger.debug(`The response for ${getFriendlyURL(effectiveRequest.url)} ` + `has a 'Vary: ${vary}' header. ` + `Consider setting the {ignoreVary: true} option on your strategy ` + `to ensure cache matching and deletion works as expected.`);
+          }
+        }
+        if (!response) {
+          {
+            logger.error(`Cannot cache non-existent response for ` + `'${getFriendlyURL(effectiveRequest.url)}'.`);
+          }
+          throw new WorkboxError('cache-put-with-no-response', {
+            url: getFriendlyURL(effectiveRequest.url)
+          });
+        }
+        const responseToCache = await this._ensureResponseSafeToCache(response);
+        if (!responseToCache) {
+          {
+            logger.debug(`Response '${getFriendlyURL(effectiveRequest.url)}' ` + `will not be cached.`, responseToCache);
+          }
+          return false;
+        }
+        const {
+          cacheName,
+          matchOptions
+        } = this._strategy;
+        const cache = await self.caches.open(cacheName);
+        const hasCacheUpdateCallback = this.hasCallback('cacheDidUpdate');
+        const oldResponse = hasCacheUpdateCallback ? await cacheMatchIgnoreParams(
+        // TODO(philipwalton): the `__WB_REVISION__` param is a precaching
+        // feature. Consider into ways to only add this behavior if using
+        // precaching.
+        cache, effectiveRequest.clone(), ['__WB_REVISION__'], matchOptions) : null;
+        {
+          logger.debug(`Updating the '${cacheName}' cache with a new Response ` + `for ${getFriendlyURL(effectiveRequest.url)}.`);
+        }
+        try {
+          await cache.put(effectiveRequest, hasCacheUpdateCallback ? responseToCache.clone() : responseToCache);
+        } catch (error) {
+          if (error instanceof Error) {
+            // See https://developer.mozilla.org/en-US/docs/Web/API/DOMException#exception-QuotaExceededError
+            if (error.name === 'QuotaExceededError') {
+              await executeQuotaErrorCallbacks();
+            }
+            throw error;
+          }
+        }
+        for (const callback of this.iterateCallbacks('cacheDidUpdate')) {
+          await callback({
+            cacheName,
+            oldResponse,
+            newResponse: responseToCache.clone(),
+            request: effectiveRequest,
+            event: this.event
+          });
+        }
+        return true;
+      }
+      /**
+       * Checks the list of plugins for the `cacheKeyWillBeUsed` callback, and
+       * executes any of those callbacks found in sequence. The final `Request`
+       * object returned by the last plugin is treated as the cache key for cache
+       * reads and/or writes. If no `cacheKeyWillBeUsed` plugin callbacks have
+       * been registered, the passed request is returned unmodified
+       *
+       * @param {Request} request
+       * @param {string} mode
+       * @return {Promise<Request>}
+       */
+      async getCacheKey(request, mode) {
+        const key = `${request.url} | ${mode}`;
+        if (!this._cacheKeys[key]) {
+          let effectiveRequest = request;
+          for (const callback of this.iterateCallbacks('cacheKeyWillBeUsed')) {
+            effectiveRequest = toRequest(await callback({
+              mode,
+              request: effectiveRequest,
+              event: this.event,
+              // params has a type any can't change right now.
+              params: this.params // eslint-disable-line
+            }));
+          }
+          this._cacheKeys[key] = effectiveRequest;
+        }
+        return this._cacheKeys[key];
+      }
+      /**
+       * Returns true if the strategy has at least one plugin with the given
+       * callback.
+       *
+       * @param {string} name The name of the callback to check for.
+       * @return {boolean}
+       */
+      hasCallback(name) {
+        for (const plugin of this._strategy.plugins) {
+          if (name in plugin) {
+            return true;
+          }
+        }
+        return false;
+      }
+      /**
+       * Runs all plugin callbacks matching the given name, in order, passing the
+       * given param object (merged ith the current plugin state) as the only
+       * argument.
+       *
+       * Note: since this method runs all plugins, it's not suitable for cases
+       * where the return value of a callback needs to be applied prior to calling
+       * the next callback. See
+       * {@link workbox-strategies.StrategyHandler#iterateCallbacks}
+       * below for how to handle that case.
+       *
+       * @param {string} name The name of the callback to run within each plugin.
+       * @param {Object} param The object to pass as the first (and only) param
+       *     when executing each callback. This object will be merged with the
+       *     current plugin state prior to callback execution.
+       */
+      async runCallbacks(name, param) {
+        for (const callback of this.iterateCallbacks(name)) {
+          // TODO(philipwalton): not sure why `any` is needed. It seems like
+          // this should work with `as WorkboxPluginCallbackParam[C]`.
+          await callback(param);
+        }
+      }
+      /**
+       * Accepts a callback and returns an iterable of matching plugin callbacks,
+       * where each callback is wrapped with the current handler state (i.e. when
+       * you call each callback, whatever object parameter you pass it will
+       * be merged with the plugin's current state).
+       *
+       * @param {string} name The name fo the callback to run
+       * @return {Array<Function>}
+       */
+      *iterateCallbacks(name) {
+        for (const plugin of this._strategy.plugins) {
+          if (typeof plugin[name] === 'function') {
+            const state = this._pluginStateMap.get(plugin);
+            const statefulCallback = param => {
+              const statefulParam = Object.assign(Object.assign({}, param), {
+                state
+              });
+              // TODO(philipwalton): not sure why `any` is needed. It seems like
+              // this should work with `as WorkboxPluginCallbackParam[C]`.
+              return plugin[name](statefulParam);
+            };
+            yield statefulCallback;
+          }
+        }
+      }
+      /**
+       * Adds a promise to the
+       * [extend lifetime promises]{@link https://w3c.github.io/ServiceWorker/#extendableevent-extend-lifetime-promises}
+       * of the event associated with the request being handled (usually a
+       * `FetchEvent`).
+       *
+       * Note: you can await
+       * {@link workbox-strategies.StrategyHandler~doneWaiting}
+       * to know when all added promises have settled.
+       *
+       * @param {Promise} promise A promise to add to the extend lifetime promises
+       *     of the event that triggered the request.
+       */
+      waitUntil(promise) {
+        this._extendLifetimePromises.push(promise);
+        return promise;
+      }
+      /**
+       * Returns a promise that resolves once all promises passed to
+       * {@link workbox-strategies.StrategyHandler~waitUntil}
+       * have settled.
+       *
+       * Note: any work done after `doneWaiting()` settles should be manually
+       * passed to an event's `waitUntil()` method (not this handler's
+       * `waitUntil()` method), otherwise the service worker thread may be killed
+       * prior to your work completing.
+       */
+      async doneWaiting() {
+        while (this._extendLifetimePromises.length) {
+          const promises = this._extendLifetimePromises.splice(0);
+          const result = await Promise.allSettled(promises);
+          const firstRejection = result.find(i => i.status === 'rejected');
+          if (firstRejection) {
+            throw firstRejection.reason;
+          }
+        }
+      }
+      /**
+       * Stops running the strategy and immediately resolves any pending
+       * `waitUntil()` promises.
+       */
+      destroy() {
+        this._handlerDeferred.resolve(null);
+      }
+      /**
+       * This method will call cacheWillUpdate on the available plugins (or use
+       * status === 200) to determine if the Response is safe and valid to cache.
+       *
+       * @param {Request} options.request
+       * @param {Response} options.response
+       * @return {Promise<Response|undefined>}
+       *
+       * @private
+       */
+      async _ensureResponseSafeToCache(response) {
+        let responseToCache = response;
+        let pluginsUsed = false;
+        for (const callback of this.iterateCallbacks('cacheWillUpdate')) {
+          responseToCache = (await callback({
+            request: this.request,
+            response: responseToCache,
+            event: this.event
+          })) || undefined;
+          pluginsUsed = true;
+          if (!responseToCache) {
+            break;
+          }
+        }
+        if (!pluginsUsed) {
+          if (responseToCache && responseToCache.status !== 200) {
+            responseToCache = undefined;
+          }
+          {
+            if (responseToCache) {
+              if (responseToCache.status !== 200) {
+                if (responseToCache.status === 0) {
+                  logger.warn(`The response for '${this.request.url}' ` + `is an opaque response. The caching strategy that you're ` + `using will not cache opaque responses by default.`);
+                } else {
+                  logger.debug(`The response for '${this.request.url}' ` + `returned a status code of '${response.status}' and won't ` + `be cached as a result.`);
+                }
+              }
+            }
+          }
+        }
+        return responseToCache;
+      }
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * An abstract base class that all other strategy classes must extend from:
+     *
+     * @memberof workbox-strategies
+     */
+    class Strategy {
+      /**
+       * Creates a new instance of the strategy and sets all documented option
+       * properties as public instance properties.
+       *
+       * Note: if a custom strategy class extends the base Strategy class and does
+       * not need more than these properties, it does not need to define its own
+       * constructor.
+       *
+       * @param {Object} [options]
+       * @param {string} [options.cacheName] Cache name to store and retrieve
+       * requests. Defaults to the cache names provided by
+       * {@link workbox-core.cacheNames}.
+       * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} [options.fetchOptions] Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)
+       * `fetch()` requests made by this strategy.
+       * @param {Object} [options.matchOptions] The
+       * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions}
+       * for any `cache.match()` or `cache.put()` calls made by this strategy.
+       */
+      constructor(options = {}) {
+        /**
+         * Cache name to store and retrieve
+         * requests. Defaults to the cache names provided by
+         * {@link workbox-core.cacheNames}.
+         *
+         * @type {string}
+         */
+        this.cacheName = cacheNames.getRuntimeName(options.cacheName);
+        /**
+         * The list
+         * [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+         * used by this strategy.
+         *
+         * @type {Array<Object>}
+         */
+        this.plugins = options.plugins || [];
+        /**
+         * Values passed along to the
+         * [`init`]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters}
+         * of all fetch() requests made by this strategy.
+         *
+         * @type {Object}
+         */
+        this.fetchOptions = options.fetchOptions;
+        /**
+         * The
+         * [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions}
+         * for any `cache.match()` or `cache.put()` calls made by this strategy.
+         *
+         * @type {Object}
+         */
+        this.matchOptions = options.matchOptions;
+      }
+      /**
+       * Perform a request strategy and returns a `Promise` that will resolve with
+       * a `Response`, invoking all relevant plugin callbacks.
+       *
+       * When a strategy instance is registered with a Workbox
+       * {@link workbox-routing.Route}, this method is automatically
+       * called when the route matches.
+       *
+       * Alternatively, this method can be used in a standalone `FetchEvent`
+       * listener by passing it to `event.respondWith()`.
+       *
+       * @param {FetchEvent|Object} options A `FetchEvent` or an object with the
+       *     properties listed below.
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {ExtendableEvent} options.event The event associated with the
+       *     request.
+       * @param {URL} [options.url]
+       * @param {*} [options.params]
+       */
+      handle(options) {
+        const [responseDone] = this.handleAll(options);
+        return responseDone;
+      }
+      /**
+       * Similar to {@link workbox-strategies.Strategy~handle}, but
+       * instead of just returning a `Promise` that resolves to a `Response` it
+       * it will return an tuple of `[response, done]` promises, where the former
+       * (`response`) is equivalent to what `handle()` returns, and the latter is a
+       * Promise that will resolve once any promises that were added to
+       * `event.waitUntil()` as part of performing the strategy have completed.
+       *
+       * You can await the `done` promise to ensure any extra work performed by
+       * the strategy (usually caching responses) completes successfully.
+       *
+       * @param {FetchEvent|Object} options A `FetchEvent` or an object with the
+       *     properties listed below.
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {ExtendableEvent} options.event The event associated with the
+       *     request.
+       * @param {URL} [options.url]
+       * @param {*} [options.params]
+       * @return {Array<Promise>} A tuple of [response, done]
+       *     promises that can be used to determine when the response resolves as
+       *     well as when the handler has completed all its work.
+       */
+      handleAll(options) {
+        // Allow for flexible options to be passed.
+        if (options instanceof FetchEvent) {
+          options = {
+            event: options,
+            request: options.request
+          };
+        }
+        const event = options.event;
+        const request = typeof options.request === 'string' ? new Request(options.request) : options.request;
+        const params = 'params' in options ? options.params : undefined;
+        const handler = new StrategyHandler(this, {
+          event,
+          request,
+          params
+        });
+        const responseDone = this._getResponse(handler, request, event);
+        const handlerDone = this._awaitComplete(responseDone, handler, request, event);
+        // Return an array of promises, suitable for use with Promise.all().
+        return [responseDone, handlerDone];
+      }
+      async _getResponse(handler, request, event) {
+        await handler.runCallbacks('handlerWillStart', {
+          event,
+          request
+        });
+        let response = undefined;
+        try {
+          response = await this._handle(request, handler);
+          // The "official" Strategy subclasses all throw this error automatically,
+          // but in case a third-party Strategy doesn't, ensure that we have a
+          // consistent failure when there's no response or an error response.
+          if (!response || response.type === 'error') {
+            throw new WorkboxError('no-response', {
+              url: request.url
+            });
+          }
+        } catch (error) {
+          if (error instanceof Error) {
+            for (const callback of handler.iterateCallbacks('handlerDidError')) {
+              response = await callback({
+                error,
+                event,
+                request
+              });
+              if (response) {
+                break;
+              }
+            }
+          }
+          if (!response) {
+            throw error;
+          } else {
+            logger.log(`While responding to '${getFriendlyURL(request.url)}', ` + `an ${error instanceof Error ? error.toString() : ''} error occurred. Using a fallback response provided by ` + `a handlerDidError plugin.`);
+          }
+        }
+        for (const callback of handler.iterateCallbacks('handlerWillRespond')) {
+          response = await callback({
+            event,
+            request,
+            response
+          });
+        }
+        return response;
+      }
+      async _awaitComplete(responseDone, handler, request, event) {
+        let response;
+        let error;
+        try {
+          response = await responseDone;
+        } catch (error) {
+          // Ignore errors, as response errors should be caught via the `response`
+          // promise above. The `done` promise will only throw for errors in
+          // promises passed to `handler.waitUntil()`.
+        }
+        try {
+          await handler.runCallbacks('handlerDidRespond', {
+            event,
+            request,
+            response
+          });
+          await handler.doneWaiting();
+        } catch (waitUntilError) {
+          if (waitUntilError instanceof Error) {
+            error = waitUntilError;
+          }
+        }
+        await handler.runCallbacks('handlerDidComplete', {
+          event,
+          request,
+          response,
+          error: error
+        });
+        handler.destroy();
+        if (error) {
+          throw error;
+        }
+      }
+    }
+    /**
+     * Classes extending the `Strategy` based class should implement this method,
+     * and leverage the {@link workbox-strategies.StrategyHandler}
+     * arg to perform all fetching and cache logic, which will ensure all relevant
+     * cache, cache options, fetch options and plugins are used (per the current
+     * strategy instance).
+     *
+     * @name _handle
+     * @instance
+     * @abstract
+     * @function
+     * @param {Request} request
+     * @param {workbox-strategies.StrategyHandler} handler
+     * @return {Promise<Response>}
+     *
+     * @memberof workbox-strategies.Strategy
+     */
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const messages = {
+      strategyStart: (strategyName, request) => `Using ${strategyName} to respond to '${getFriendlyURL(request.url)}'`,
+      printFinalResponse: response => {
+        if (response) {
+          logger.groupCollapsed(`View the final response here.`);
+          logger.log(response || '[No response returned]');
+          logger.groupEnd();
+        }
+      }
+    };
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * An implementation of a
+     * [network first](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-first-falling-back-to-cache)
+     * request strategy.
+     *
+     * By default, this strategy will cache responses with a 200 status code as
+     * well as [opaque responses](https://developer.chrome.com/docs/workbox/caching-resources-during-runtime/#opaque-responses).
+     * Opaque responses are are cross-origin requests where the response doesn't
+     * support [CORS](https://enable-cors.org/).
+     *
+     * If the network request fails, and there is no cache match, this will throw
+     * a `WorkboxError` exception.
+     *
+     * @extends workbox-strategies.Strategy
+     * @memberof workbox-strategies
+     */
+    class NetworkFirst extends Strategy {
+      /**
+       * @param {Object} [options]
+       * @param {string} [options.cacheName] Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * {@link workbox-core.cacheNames}.
+       * @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} [options.fetchOptions] Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)
+       * `fetch()` requests made by this strategy.
+       * @param {Object} [options.matchOptions] [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
+       * @param {number} [options.networkTimeoutSeconds] If set, any network requests
+       * that fail to respond within the timeout will fallback to the cache.
+       *
+       * This option can be used to combat
+       * "[lie-fi]{@link https://developers.google.com/web/fundamentals/performance/poor-connectivity/#lie-fi}"
+       * scenarios.
+       */
+      constructor(options = {}) {
+        super(options);
+        // If this instance contains no plugins with a 'cacheWillUpdate' callback,
+        // prepend the `cacheOkAndOpaquePlugin` plugin to the plugins list.
+        if (!this.plugins.some(p => 'cacheWillUpdate' in p)) {
+          this.plugins.unshift(cacheOkAndOpaquePlugin);
+        }
+        this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;
+        {
+          if (this._networkTimeoutSeconds) {
+            finalAssertExports.isType(this._networkTimeoutSeconds, 'number', {
+              moduleName: 'workbox-strategies',
+              className: this.constructor.name,
+              funcName: 'constructor',
+              paramName: 'networkTimeoutSeconds'
+            });
+          }
+        }
+      }
+      /**
+       * @private
+       * @param {Request|string} request A request to run this strategy for.
+       * @param {workbox-strategies.StrategyHandler} handler The event that
+       *     triggered the request.
+       * @return {Promise<Response>}
+       */
+      async _handle(request, handler) {
+        const logs = [];
+        {
+          finalAssertExports.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: this.constructor.name,
+            funcName: 'handle',
+            paramName: 'makeRequest'
+          });
+        }
+        const promises = [];
+        let timeoutId;
+        if (this._networkTimeoutSeconds) {
+          const {
+            id,
+            promise
+          } = this._getTimeoutPromise({
+            request,
+            logs,
+            handler
+          });
+          timeoutId = id;
+          promises.push(promise);
+        }
+        const networkPromise = this._getNetworkPromise({
+          timeoutId,
+          request,
+          logs,
+          handler
+        });
+        promises.push(networkPromise);
+        const response = await handler.waitUntil((async () => {
+          // Promise.race() will resolve as soon as the first promise resolves.
+          return (await handler.waitUntil(Promise.race(promises))) || (
+          // If Promise.race() resolved with null, it might be due to a network
+          // timeout + a cache miss. If that were to happen, we'd rather wait until
+          // the networkPromise resolves instead of returning null.
+          // Note that it's fine to await an already-resolved promise, so we don't
+          // have to check to see if it's still "in flight".
+          await networkPromise);
+        })());
+        {
+          logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
+          for (const log of logs) {
+            logger.log(log);
+          }
+          messages.printFinalResponse(response);
+          logger.groupEnd();
+        }
+        if (!response) {
+          throw new WorkboxError('no-response', {
+            url: request.url
+          });
+        }
+        return response;
+      }
+      /**
+       * @param {Object} options
+       * @param {Request} options.request
+       * @param {Array} options.logs A reference to the logs array
+       * @param {Event} options.event
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+      _getTimeoutPromise({
+        request,
+        logs,
+        handler
+      }) {
+        let timeoutId;
+        const timeoutPromise = new Promise(resolve => {
+          const onNetworkTimeout = async () => {
+            {
+              logs.push(`Timing out the network response at ` + `${this._networkTimeoutSeconds} seconds.`);
+            }
+            resolve(await handler.cacheMatch(request));
+          };
+          timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000);
+        });
+        return {
+          promise: timeoutPromise,
+          id: timeoutId
+        };
+      }
+      /**
+       * @param {Object} options
+       * @param {number|undefined} options.timeoutId
+       * @param {Request} options.request
+       * @param {Array} options.logs A reference to the logs Array.
+       * @param {Event} options.event
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+      async _getNetworkPromise({
+        timeoutId,
+        request,
+        logs,
+        handler
+      }) {
+        let error;
+        let response;
+        try {
+          response = await handler.fetchAndCachePut(request);
+        } catch (fetchError) {
+          if (fetchError instanceof Error) {
+            error = fetchError;
+          }
+        }
+        if (timeoutId) {
+          clearTimeout(timeoutId);
+        }
+        {
+          if (response) {
+            logs.push(`Got response from network.`);
+          } else {
+            logs.push(`Unable to get a response from the network. Will respond ` + `with a cached response.`);
+          }
+        }
+        if (error || !response) {
+          response = await handler.cacheMatch(request);
+          {
+            if (response) {
+              logs.push(`Found a cached response in the '${this.cacheName}'` + ` cache.`);
+            } else {
+              logs.push(`No response found in the '${this.cacheName}' cache.`);
+            }
+          }
+        }
+        return response;
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Claim any currently available clients once the service worker
+     * becomes active. This is normally used in conjunction with `skipWaiting()`.
+     *
+     * @memberof workbox-core
+     */
+    function clientsClaim() {
+      self.addEventListener('activate', () => self.clients.claim());
+    }
+
+    /*
+      Copyright 2020 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A utility method that makes it easier to use `event.waitUntil` with
+     * async functions and return the result.
+     *
+     * @param {ExtendableEvent} event
+     * @param {Function} asyncFn
+     * @return {Function}
+     * @private
+     */
+    function waitUntil(event, asyncFn) {
+      const returnPromise = asyncFn();
+      event.waitUntil(returnPromise);
+      return returnPromise;
+    }
+
+    // @ts-ignore
+    try {
+      self['workbox:precaching:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    // Name of the search parameter used to store revision info.
+    const REVISION_SEARCH_PARAM = '__WB_REVISION__';
+    /**
+     * Converts a manifest entry into a versioned URL suitable for precaching.
+     *
+     * @param {Object|string} entry
+     * @return {string} A URL with versioning info.
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    function createCacheKey(entry) {
+      if (!entry) {
+        throw new WorkboxError('add-to-cache-list-unexpected-type', {
+          entry
+        });
+      }
+      // If a precache manifest entry is a string, it's assumed to be a versioned
+      // URL, like '/app.abcd1234.js'. Return as-is.
+      if (typeof entry === 'string') {
+        const urlObject = new URL(entry, location.href);
+        return {
+          cacheKey: urlObject.href,
+          url: urlObject.href
+        };
+      }
+      const {
+        revision,
+        url
+      } = entry;
+      if (!url) {
+        throw new WorkboxError('add-to-cache-list-unexpected-type', {
+          entry
+        });
+      }
+      // If there's just a URL and no revision, then it's also assumed to be a
+      // versioned URL.
+      if (!revision) {
+        const urlObject = new URL(url, location.href);
+        return {
+          cacheKey: urlObject.href,
+          url: urlObject.href
+        };
+      }
+      // Otherwise, construct a properly versioned URL using the custom Workbox
+      // search parameter along with the revision info.
+      const cacheKeyURL = new URL(url, location.href);
+      const originalURL = new URL(url, location.href);
+      cacheKeyURL.searchParams.set(REVISION_SEARCH_PARAM, revision);
+      return {
+        cacheKey: cacheKeyURL.href,
+        url: originalURL.href
+      };
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A plugin, designed to be used with PrecacheController, to determine the
+     * of assets that were updated (or not updated) during the install event.
+     *
+     * @private
+     */
+    class PrecacheInstallReportPlugin {
+      constructor() {
+        this.updatedURLs = [];
+        this.notUpdatedURLs = [];
+        this.handlerWillStart = async ({
+          request,
+          state
+        }) => {
+          // TODO: `state` should never be undefined...
+          if (state) {
+            state.originalRequest = request;
+          }
+        };
+        this.cachedResponseWillBeUsed = async ({
+          event,
+          state,
+          cachedResponse
+        }) => {
+          if (event.type === 'install') {
+            if (state && state.originalRequest && state.originalRequest instanceof Request) {
+              // TODO: `state` should never be undefined...
+              const url = state.originalRequest.url;
+              if (cachedResponse) {
+                this.notUpdatedURLs.push(url);
+              } else {
+                this.updatedURLs.push(url);
+              }
+            }
+          }
+          return cachedResponse;
+        };
+      }
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A plugin, designed to be used with PrecacheController, to translate URLs into
+     * the corresponding cache key, based on the current revision info.
+     *
+     * @private
+     */
+    class PrecacheCacheKeyPlugin {
+      constructor({
+        precacheController
+      }) {
+        this.cacheKeyWillBeUsed = async ({
+          request,
+          params
+        }) => {
+          // Params is type any, can't change right now.
+          /* eslint-disable */
+          const cacheKey = (params === null || params === void 0 ? void 0 : params.cacheKey) || this._precacheController.getCacheKeyForURL(request.url);
+          /* eslint-enable */
+          return cacheKey ? new Request(cacheKey, {
+            headers: request.headers
+          }) : request;
+        };
+        this._precacheController = precacheController;
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * @param {string} groupTitle
+     * @param {Array<string>} deletedURLs
+     *
+     * @private
+     */
+    const logGroup = (groupTitle, deletedURLs) => {
+      logger.groupCollapsed(groupTitle);
+      for (const url of deletedURLs) {
+        logger.log(url);
+      }
+      logger.groupEnd();
+    };
+    /**
+     * @param {Array<string>} deletedURLs
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    function printCleanupDetails(deletedURLs) {
+      const deletionCount = deletedURLs.length;
+      if (deletionCount > 0) {
+        logger.groupCollapsed(`During precaching cleanup, ` + `${deletionCount} cached ` + `request${deletionCount === 1 ? ' was' : 's were'} deleted.`);
+        logGroup('Deleted Cache Requests', deletedURLs);
+        logger.groupEnd();
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * @param {string} groupTitle
+     * @param {Array<string>} urls
+     *
+     * @private
+     */
+    function _nestedGroup(groupTitle, urls) {
+      if (urls.length === 0) {
+        return;
+      }
+      logger.groupCollapsed(groupTitle);
+      for (const url of urls) {
+        logger.log(url);
+      }
+      logger.groupEnd();
+    }
+    /**
+     * @param {Array<string>} urlsToPrecache
+     * @param {Array<string>} urlsAlreadyPrecached
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    function printInstallDetails(urlsToPrecache, urlsAlreadyPrecached) {
+      const precachedCount = urlsToPrecache.length;
+      const alreadyPrecachedCount = urlsAlreadyPrecached.length;
+      if (precachedCount || alreadyPrecachedCount) {
+        let message = `Precaching ${precachedCount} file${precachedCount === 1 ? '' : 's'}.`;
+        if (alreadyPrecachedCount > 0) {
+          message += ` ${alreadyPrecachedCount} ` + `file${alreadyPrecachedCount === 1 ? ' is' : 's are'} already cached.`;
+        }
+        logger.groupCollapsed(message);
+        _nestedGroup(`View newly precached URLs.`, urlsToPrecache);
+        _nestedGroup(`View previously precached URLs.`, urlsAlreadyPrecached);
+        logger.groupEnd();
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    let supportStatus;
+    /**
+     * A utility function that determines whether the current browser supports
+     * constructing a new `Response` from a `response.body` stream.
+     *
+     * @return {boolean} `true`, if the current browser can successfully
+     *     construct a `Response` from a `response.body` stream, `false` otherwise.
+     *
+     * @private
+     */
+    function canConstructResponseFromBodyStream() {
+      if (supportStatus === undefined) {
+        const testResponse = new Response('');
+        if ('body' in testResponse) {
+          try {
+            new Response(testResponse.body);
+            supportStatus = true;
+          } catch (error) {
+            supportStatus = false;
+          }
+        }
+        supportStatus = false;
+      }
+      return supportStatus;
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Allows developers to copy a response and modify its `headers`, `status`,
+     * or `statusText` values (the values settable via a
+     * [`ResponseInit`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Response/Response#Syntax}
+     * object in the constructor).
+     * To modify these values, pass a function as the second argument. That
+     * function will be invoked with a single object with the response properties
+     * `{headers, status, statusText}`. The return value of this function will
+     * be used as the `ResponseInit` for the new `Response`. To change the values
+     * either modify the passed parameter(s) and return it, or return a totally
+     * new object.
+     *
+     * This method is intentionally limited to same-origin responses, regardless of
+     * whether CORS was used or not.
+     *
+     * @param {Response} response
+     * @param {Function} modifier
+     * @memberof workbox-core
+     */
+    async function copyResponse(response, modifier) {
+      let origin = null;
+      // If response.url isn't set, assume it's cross-origin and keep origin null.
+      if (response.url) {
+        const responseURL = new URL(response.url);
+        origin = responseURL.origin;
+      }
+      if (origin !== self.location.origin) {
+        throw new WorkboxError('cross-origin-copy-response', {
+          origin
+        });
+      }
+      const clonedResponse = response.clone();
+      // Create a fresh `ResponseInit` object by cloning the headers.
+      const responseInit = {
+        headers: new Headers(clonedResponse.headers),
+        status: clonedResponse.status,
+        statusText: clonedResponse.statusText
+      };
+      // Apply any user modifications.
+      const modifiedResponseInit = modifier ? modifier(responseInit) : responseInit;
+      // Create the new response from the body stream and `ResponseInit`
+      // modifications. Note: not all browsers support the Response.body stream,
+      // so fall back to reading the entire body into memory as a blob.
+      const body = canConstructResponseFromBodyStream() ? clonedResponse.body : await clonedResponse.blob();
+      return new Response(body, modifiedResponseInit);
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A {@link workbox-strategies.Strategy} implementation
+     * specifically designed to work with
+     * {@link workbox-precaching.PrecacheController}
+     * to both cache and fetch precached assets.
+     *
+     * Note: an instance of this class is created automatically when creating a
+     * `PrecacheController`; it's generally not necessary to create this yourself.
+     *
+     * @extends workbox-strategies.Strategy
+     * @memberof workbox-precaching
+     */
+    class PrecacheStrategy extends Strategy {
+      /**
+       *
+       * @param {Object} [options]
+       * @param {string} [options.cacheName] Cache name to store and retrieve
+       * requests. Defaults to the cache names provided by
+       * {@link workbox-core.cacheNames}.
+       * @param {Array<Object>} [options.plugins] {@link https://developers.google.com/web/tools/workbox/guides/using-plugins|Plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} [options.fetchOptions] Values passed along to the
+       * {@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters|init}
+       * of all fetch() requests made by this strategy.
+       * @param {Object} [options.matchOptions] The
+       * {@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions|CacheQueryOptions}
+       * for any `cache.match()` or `cache.put()` calls made by this strategy.
+       * @param {boolean} [options.fallbackToNetwork=true] Whether to attempt to
+       * get the response from the network if there's a precache miss.
+       */
+      constructor(options = {}) {
+        options.cacheName = cacheNames.getPrecacheName(options.cacheName);
+        super(options);
+        this._fallbackToNetwork = options.fallbackToNetwork === false ? false : true;
+        // Redirected responses cannot be used to satisfy a navigation request, so
+        // any redirected response must be "copied" rather than cloned, so the new
+        // response doesn't contain the `redirected` flag. See:
+        // https://bugs.chromium.org/p/chromium/issues/detail?id=669363&desc=2#c1
+        this.plugins.push(PrecacheStrategy.copyRedirectedCacheableResponsesPlugin);
+      }
+      /**
+       * @private
+       * @param {Request|string} request A request to run this strategy for.
+       * @param {workbox-strategies.StrategyHandler} handler The event that
+       *     triggered the request.
+       * @return {Promise<Response>}
+       */
+      async _handle(request, handler) {
+        const response = await handler.cacheMatch(request);
+        if (response) {
+          return response;
+        }
+        // If this is an `install` event for an entry that isn't already cached,
+        // then populate the cache.
+        if (handler.event && handler.event.type === 'install') {
+          return await this._handleInstall(request, handler);
+        }
+        // Getting here means something went wrong. An entry that should have been
+        // precached wasn't found in the cache.
+        return await this._handleFetch(request, handler);
+      }
+      async _handleFetch(request, handler) {
+        let response;
+        const params = handler.params || {};
+        // Fall back to the network if we're configured to do so.
+        if (this._fallbackToNetwork) {
+          {
+            logger.warn(`The precached response for ` + `${getFriendlyURL(request.url)} in ${this.cacheName} was not ` + `found. Falling back to the network.`);
+          }
+          const integrityInManifest = params.integrity;
+          const integrityInRequest = request.integrity;
+          const noIntegrityConflict = !integrityInRequest || integrityInRequest === integrityInManifest;
+          // Do not add integrity if the original request is no-cors
+          // See https://github.com/GoogleChrome/workbox/issues/3096
+          response = await handler.fetch(new Request(request, {
+            integrity: request.mode !== 'no-cors' ? integrityInRequest || integrityInManifest : undefined
+          }));
+          // It's only "safe" to repair the cache if we're using SRI to guarantee
+          // that the response matches the precache manifest's expectations,
+          // and there's either a) no integrity property in the incoming request
+          // or b) there is an integrity, and it matches the precache manifest.
+          // See https://github.com/GoogleChrome/workbox/issues/2858
+          // Also if the original request users no-cors we don't use integrity.
+          // See https://github.com/GoogleChrome/workbox/issues/3096
+          if (integrityInManifest && noIntegrityConflict && request.mode !== 'no-cors') {
+            this._useDefaultCacheabilityPluginIfNeeded();
+            const wasCached = await handler.cachePut(request, response.clone());
+            {
+              if (wasCached) {
+                logger.log(`A response for ${getFriendlyURL(request.url)} ` + `was used to "repair" the precache.`);
+              }
+            }
+          }
+        } else {
+          // This shouldn't normally happen, but there are edge cases:
+          // https://github.com/GoogleChrome/workbox/issues/1441
+          throw new WorkboxError('missing-precache-entry', {
+            cacheName: this.cacheName,
+            url: request.url
+          });
+        }
+        {
+          const cacheKey = params.cacheKey || (await handler.getCacheKey(request, 'read'));
+          // Workbox is going to handle the route.
+          // print the routing details to the console.
+          logger.groupCollapsed(`Precaching is responding to: ` + getFriendlyURL(request.url));
+          logger.log(`Serving the precached url: ${getFriendlyURL(cacheKey instanceof Request ? cacheKey.url : cacheKey)}`);
+          logger.groupCollapsed(`View request details here.`);
+          logger.log(request);
+          logger.groupEnd();
+          logger.groupCollapsed(`View response details here.`);
+          logger.log(response);
+          logger.groupEnd();
+          logger.groupEnd();
+        }
+        return response;
+      }
+      async _handleInstall(request, handler) {
+        this._useDefaultCacheabilityPluginIfNeeded();
+        const response = await handler.fetch(request);
+        // Make sure we defer cachePut() until after we know the response
+        // should be cached; see https://github.com/GoogleChrome/workbox/issues/2737
+        const wasCached = await handler.cachePut(request, response.clone());
+        if (!wasCached) {
+          // Throwing here will lead to the `install` handler failing, which
+          // we want to do if *any* of the responses aren't safe to cache.
+          throw new WorkboxError('bad-precaching-response', {
+            url: request.url,
+            status: response.status
+          });
+        }
+        return response;
+      }
+      /**
+       * This method is complex, as there a number of things to account for:
+       *
+       * The `plugins` array can be set at construction, and/or it might be added to
+       * to at any time before the strategy is used.
+       *
+       * At the time the strategy is used (i.e. during an `install` event), there
+       * needs to be at least one plugin that implements `cacheWillUpdate` in the
+       * array, other than `copyRedirectedCacheableResponsesPlugin`.
+       *
+       * - If this method is called and there are no suitable `cacheWillUpdate`
+       * plugins, we need to add `defaultPrecacheCacheabilityPlugin`.
+       *
+       * - If this method is called and there is exactly one `cacheWillUpdate`, then
+       * we don't have to do anything (this might be a previously added
+       * `defaultPrecacheCacheabilityPlugin`, or it might be a custom plugin).
+       *
+       * - If this method is called and there is more than one `cacheWillUpdate`,
+       * then we need to check if one is `defaultPrecacheCacheabilityPlugin`. If so,
+       * we need to remove it. (This situation is unlikely, but it could happen if
+       * the strategy is used multiple times, the first without a `cacheWillUpdate`,
+       * and then later on after manually adding a custom `cacheWillUpdate`.)
+       *
+       * See https://github.com/GoogleChrome/workbox/issues/2737 for more context.
+       *
+       * @private
+       */
+      _useDefaultCacheabilityPluginIfNeeded() {
+        let defaultPluginIndex = null;
+        let cacheWillUpdatePluginCount = 0;
+        for (const [index, plugin] of this.plugins.entries()) {
+          // Ignore the copy redirected plugin when determining what to do.
+          if (plugin === PrecacheStrategy.copyRedirectedCacheableResponsesPlugin) {
+            continue;
+          }
+          // Save the default plugin's index, in case it needs to be removed.
+          if (plugin === PrecacheStrategy.defaultPrecacheCacheabilityPlugin) {
+            defaultPluginIndex = index;
+          }
+          if (plugin.cacheWillUpdate) {
+            cacheWillUpdatePluginCount++;
+          }
+        }
+        if (cacheWillUpdatePluginCount === 0) {
+          this.plugins.push(PrecacheStrategy.defaultPrecacheCacheabilityPlugin);
+        } else if (cacheWillUpdatePluginCount > 1 && defaultPluginIndex !== null) {
+          // Only remove the default plugin; multiple custom plugins are allowed.
+          this.plugins.splice(defaultPluginIndex, 1);
+        }
+        // Nothing needs to be done if cacheWillUpdatePluginCount is 1
+      }
+    }
+    PrecacheStrategy.defaultPrecacheCacheabilityPlugin = {
+      async cacheWillUpdate({
+        response
+      }) {
+        if (!response || response.status >= 400) {
+          return null;
+        }
+        return response;
+      }
+    };
+    PrecacheStrategy.copyRedirectedCacheableResponsesPlugin = {
+      async cacheWillUpdate({
+        response
+      }) {
+        return response.redirected ? await copyResponse(response) : response;
+      }
+    };
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Performs efficient precaching of assets.
+     *
+     * @memberof workbox-precaching
+     */
+    class PrecacheController {
+      /**
+       * Create a new PrecacheController.
+       *
+       * @param {Object} [options]
+       * @param {string} [options.cacheName] The cache to use for precaching.
+       * @param {string} [options.plugins] Plugins to use when precaching as well
+       * as responding to fetch events for precached assets.
+       * @param {boolean} [options.fallbackToNetwork=true] Whether to attempt to
+       * get the response from the network if there's a precache miss.
+       */
+      constructor({
+        cacheName,
+        plugins = [],
+        fallbackToNetwork = true
+      } = {}) {
+        this._urlsToCacheKeys = new Map();
+        this._urlsToCacheModes = new Map();
+        this._cacheKeysToIntegrities = new Map();
+        this._strategy = new PrecacheStrategy({
+          cacheName: cacheNames.getPrecacheName(cacheName),
+          plugins: [...plugins, new PrecacheCacheKeyPlugin({
+            precacheController: this
+          })],
+          fallbackToNetwork
+        });
+        // Bind the install and activate methods to the instance.
+        this.install = this.install.bind(this);
+        this.activate = this.activate.bind(this);
+      }
+      /**
+       * @type {workbox-precaching.PrecacheStrategy} The strategy created by this controller and
+       * used to cache assets and respond to fetch events.
+       */
+      get strategy() {
+        return this._strategy;
+      }
+      /**
+       * Adds items to the precache list, removing any duplicates and
+       * stores the files in the
+       * {@link workbox-core.cacheNames|"precache cache"} when the service
+       * worker installs.
+       *
+       * This method can be called multiple times.
+       *
+       * @param {Array<Object|string>} [entries=[]] Array of entries to precache.
+       */
+      precache(entries) {
+        this.addToCacheList(entries);
+        if (!this._installAndActiveListenersAdded) {
+          self.addEventListener('install', this.install);
+          self.addEventListener('activate', this.activate);
+          this._installAndActiveListenersAdded = true;
+        }
+      }
+      /**
+       * This method will add items to the precache list, removing duplicates
+       * and ensuring the information is valid.
+       *
+       * @param {Array<workbox-precaching.PrecacheController.PrecacheEntry|string>} entries
+       *     Array of entries to precache.
+       */
+      addToCacheList(entries) {
+        {
+          finalAssertExports.isArray(entries, {
+            moduleName: 'workbox-precaching',
+            className: 'PrecacheController',
+            funcName: 'addToCacheList',
+            paramName: 'entries'
+          });
+        }
+        const urlsToWarnAbout = [];
+        for (const entry of entries) {
+          // See https://github.com/GoogleChrome/workbox/issues/2259
+          if (typeof entry === 'string') {
+            urlsToWarnAbout.push(entry);
+          } else if (entry && entry.revision === undefined) {
+            urlsToWarnAbout.push(entry.url);
+          }
+          const {
+            cacheKey,
+            url
+          } = createCacheKey(entry);
+          const cacheMode = typeof entry !== 'string' && entry.revision ? 'reload' : 'default';
+          if (this._urlsToCacheKeys.has(url) && this._urlsToCacheKeys.get(url) !== cacheKey) {
+            throw new WorkboxError('add-to-cache-list-conflicting-entries', {
+              firstEntry: this._urlsToCacheKeys.get(url),
+              secondEntry: cacheKey
+            });
+          }
+          if (typeof entry !== 'string' && entry.integrity) {
+            if (this._cacheKeysToIntegrities.has(cacheKey) && this._cacheKeysToIntegrities.get(cacheKey) !== entry.integrity) {
+              throw new WorkboxError('add-to-cache-list-conflicting-integrities', {
+                url
+              });
+            }
+            this._cacheKeysToIntegrities.set(cacheKey, entry.integrity);
+          }
+          this._urlsToCacheKeys.set(url, cacheKey);
+          this._urlsToCacheModes.set(url, cacheMode);
+          if (urlsToWarnAbout.length > 0) {
+            const warningMessage = `Workbox is precaching URLs without revision ` + `info: ${urlsToWarnAbout.join(', ')}\nThis is generally NOT safe. ` + `Learn more at https://bit.ly/wb-precache`;
+            {
+              logger.warn(warningMessage);
+            }
+          }
+        }
+      }
+      /**
+       * Precaches new and updated assets. Call this method from the service worker
+       * install event.
+       *
+       * Note: this method calls `event.waitUntil()` for you, so you do not need
+       * to call it yourself in your event handlers.
+       *
+       * @param {ExtendableEvent} event
+       * @return {Promise<workbox-precaching.InstallResult>}
+       */
+      install(event) {
+        // waitUntil returns Promise<any>
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+        return waitUntil(event, async () => {
+          const installReportPlugin = new PrecacheInstallReportPlugin();
+          this.strategy.plugins.push(installReportPlugin);
+          // Cache entries one at a time.
+          // See https://github.com/GoogleChrome/workbox/issues/2528
+          for (const [url, cacheKey] of this._urlsToCacheKeys) {
+            const integrity = this._cacheKeysToIntegrities.get(cacheKey);
+            const cacheMode = this._urlsToCacheModes.get(url);
+            const request = new Request(url, {
+              integrity,
+              cache: cacheMode,
+              credentials: 'same-origin'
+            });
+            await Promise.all(this.strategy.handleAll({
+              params: {
+                cacheKey
+              },
+              request,
+              event
+            }));
+          }
+          const {
+            updatedURLs,
+            notUpdatedURLs
+          } = installReportPlugin;
+          {
+            printInstallDetails(updatedURLs, notUpdatedURLs);
+          }
+          return {
+            updatedURLs,
+            notUpdatedURLs
+          };
+        });
+      }
+      /**
+       * Deletes assets that are no longer present in the current precache manifest.
+       * Call this method from the service worker activate event.
+       *
+       * Note: this method calls `event.waitUntil()` for you, so you do not need
+       * to call it yourself in your event handlers.
+       *
+       * @param {ExtendableEvent} event
+       * @return {Promise<workbox-precaching.CleanupResult>}
+       */
+      activate(event) {
+        // waitUntil returns Promise<any>
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+        return waitUntil(event, async () => {
+          const cache = await self.caches.open(this.strategy.cacheName);
+          const currentlyCachedRequests = await cache.keys();
+          const expectedCacheKeys = new Set(this._urlsToCacheKeys.values());
+          const deletedURLs = [];
+          for (const request of currentlyCachedRequests) {
+            if (!expectedCacheKeys.has(request.url)) {
+              await cache.delete(request);
+              deletedURLs.push(request.url);
+            }
+          }
+          {
+            printCleanupDetails(deletedURLs);
+          }
+          return {
+            deletedURLs
+          };
+        });
+      }
+      /**
+       * Returns a mapping of a precached URL to the corresponding cache key, taking
+       * into account the revision information for the URL.
+       *
+       * @return {Map<string, string>} A URL to cache key mapping.
+       */
+      getURLsToCacheKeys() {
+        return this._urlsToCacheKeys;
+      }
+      /**
+       * Returns a list of all the URLs that have been precached by the current
+       * service worker.
+       *
+       * @return {Array<string>} The precached URLs.
+       */
+      getCachedURLs() {
+        return [...this._urlsToCacheKeys.keys()];
+      }
+      /**
+       * Returns the cache key used for storing a given URL. If that URL is
+       * unversioned, like `/index.html', then the cache key will be the original
+       * URL with a search parameter appended to it.
+       *
+       * @param {string} url A URL whose cache key you want to look up.
+       * @return {string} The versioned URL that corresponds to a cache key
+       * for the original URL, or undefined if that URL isn't precached.
+       */
+      getCacheKeyForURL(url) {
+        const urlObject = new URL(url, location.href);
+        return this._urlsToCacheKeys.get(urlObject.href);
+      }
+      /**
+       * @param {string} url A cache key whose SRI you want to look up.
+       * @return {string} The subresource integrity associated with the cache key,
+       * or undefined if it's not set.
+       */
+      getIntegrityForCacheKey(cacheKey) {
+        return this._cacheKeysToIntegrities.get(cacheKey);
+      }
+      /**
+       * This acts as a drop-in replacement for
+       * [`cache.match()`](https://developer.mozilla.org/en-US/docs/Web/API/Cache/match)
+       * with the following differences:
+       *
+       * - It knows what the name of the precache is, and only checks in that cache.
+       * - It allows you to pass in an "original" URL without versioning parameters,
+       * and it will automatically look up the correct cache key for the currently
+       * active revision of that URL.
+       *
+       * E.g., `matchPrecache('index.html')` will find the correct precached
+       * response for the currently active service worker, even if the actual cache
+       * key is `'/index.html?__WB_REVISION__=1234abcd'`.
+       *
+       * @param {string|Request} request The key (without revisioning parameters)
+       * to look up in the precache.
+       * @return {Promise<Response|undefined>}
+       */
+      async matchPrecache(request) {
+        const url = request instanceof Request ? request.url : request;
+        const cacheKey = this.getCacheKeyForURL(url);
+        if (cacheKey) {
+          const cache = await self.caches.open(this.strategy.cacheName);
+          return cache.match(cacheKey);
+        }
+        return undefined;
+      }
+      /**
+       * Returns a function that looks up `url` in the precache (taking into
+       * account revision information), and returns the corresponding `Response`.
+       *
+       * @param {string} url The precached URL which will be used to lookup the
+       * `Response`.
+       * @return {workbox-routing~handlerCallback}
+       */
+      createHandlerBoundToURL(url) {
+        const cacheKey = this.getCacheKeyForURL(url);
+        if (!cacheKey) {
+          throw new WorkboxError('non-precached-url', {
+            url
+          });
+        }
+        return options => {
+          options.request = new Request(url);
+          options.params = Object.assign({
+            cacheKey
+          }, options.params);
+          return this.strategy.handle(options);
+        };
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    let precacheController;
+    /**
+     * @return {PrecacheController}
+     * @private
+     */
+    const getOrCreatePrecacheController = () => {
+      if (!precacheController) {
+        precacheController = new PrecacheController();
+      }
+      return precacheController;
+    };
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Removes any URL search parameters that should be ignored.
+     *
+     * @param {URL} urlObject The original URL.
+     * @param {Array<RegExp>} ignoreURLParametersMatching RegExps to test against
+     * each search parameter name. Matches mean that the search parameter should be
+     * ignored.
+     * @return {URL} The URL with any ignored search parameters removed.
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    function removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching = []) {
+      // Convert the iterable into an array at the start of the loop to make sure
+      // deletion doesn't mess up iteration.
+      for (const paramName of [...urlObject.searchParams.keys()]) {
+        if (ignoreURLParametersMatching.some(regExp => regExp.test(paramName))) {
+          urlObject.searchParams.delete(paramName);
+        }
+      }
+      return urlObject;
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Generator function that yields possible variations on the original URL to
+     * check, one at a time.
+     *
+     * @param {string} url
+     * @param {Object} options
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    function* generateURLVariations(url, {
+      ignoreURLParametersMatching = [/^utm_/, /^fbclid$/],
+      directoryIndex = 'index.html',
+      cleanURLs = true,
+      urlManipulation
+    } = {}) {
+      const urlObject = new URL(url, location.href);
+      urlObject.hash = '';
+      yield urlObject.href;
+      const urlWithoutIgnoredParams = removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching);
+      yield urlWithoutIgnoredParams.href;
+      if (directoryIndex && urlWithoutIgnoredParams.pathname.endsWith('/')) {
+        const directoryURL = new URL(urlWithoutIgnoredParams.href);
+        directoryURL.pathname += directoryIndex;
+        yield directoryURL.href;
+      }
+      if (cleanURLs) {
+        const cleanURL = new URL(urlWithoutIgnoredParams.href);
+        cleanURL.pathname += '.html';
+        yield cleanURL.href;
+      }
+      if (urlManipulation) {
+        const additionalURLs = urlManipulation({
+          url: urlObject
+        });
+        for (const urlToAttempt of additionalURLs) {
+          yield urlToAttempt.href;
+        }
+      }
+    }
+
+    /*
+      Copyright 2020 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * A subclass of {@link workbox-routing.Route} that takes a
+     * {@link workbox-precaching.PrecacheController}
+     * instance and uses it to match incoming requests and handle fetching
+     * responses from the precache.
+     *
+     * @memberof workbox-precaching
+     * @extends workbox-routing.Route
+     */
+    class PrecacheRoute extends Route {
+      /**
+       * @param {PrecacheController} precacheController A `PrecacheController`
+       * instance used to both match requests and respond to fetch events.
+       * @param {Object} [options] Options to control how requests are matched
+       * against the list of precached URLs.
+       * @param {string} [options.directoryIndex=index.html] The `directoryIndex` will
+       * check cache entries for a URLs ending with '/' to see if there is a hit when
+       * appending the `directoryIndex` value.
+       * @param {Array<RegExp>} [options.ignoreURLParametersMatching=[/^utm_/, /^fbclid$/]] An
+       * array of regex's to remove search params when looking for a cache match.
+       * @param {boolean} [options.cleanURLs=true] The `cleanURLs` option will
+       * check the cache for the URL with a `.html` added to the end of the end.
+       * @param {workbox-precaching~urlManipulation} [options.urlManipulation]
+       * This is a function that should take a URL and return an array of
+       * alternative URLs that should be checked for precache matches.
+       */
+      constructor(precacheController, options) {
+        const match = ({
+          request
+        }) => {
+          const urlsToCacheKeys = precacheController.getURLsToCacheKeys();
+          for (const possibleURL of generateURLVariations(request.url, options)) {
+            const cacheKey = urlsToCacheKeys.get(possibleURL);
+            if (cacheKey) {
+              const integrity = precacheController.getIntegrityForCacheKey(cacheKey);
+              return {
+                cacheKey,
+                integrity
+              };
+            }
+          }
+          {
+            logger.debug(`Precaching did not find a match for ` + getFriendlyURL(request.url));
+          }
+          return;
+        };
+        super(match, precacheController.strategy);
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Add a `fetch` listener to the service worker that will
+     * respond to
+     * [network requests]{@link https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers#Custom_responses_to_requests}
+     * with precached assets.
+     *
+     * Requests for assets that aren't precached, the `FetchEvent` will not be
+     * responded to, allowing the event to fall through to other `fetch` event
+     * listeners.
+     *
+     * @param {Object} [options] See the {@link workbox-precaching.PrecacheRoute}
+     * options.
+     *
+     * @memberof workbox-precaching
+     */
+    function addRoute(options) {
+      const precacheController = getOrCreatePrecacheController();
+      const precacheRoute = new PrecacheRoute(precacheController, options);
+      registerRoute(precacheRoute);
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Adds items to the precache list, removing any duplicates and
+     * stores the files in the
+     * {@link workbox-core.cacheNames|"precache cache"} when the service
+     * worker installs.
+     *
+     * This method can be called multiple times.
+     *
+     * Please note: This method **will not** serve any of the cached files for you.
+     * It only precaches files. To respond to a network request you call
+     * {@link workbox-precaching.addRoute}.
+     *
+     * If you have a single array of files to precache, you can just call
+     * {@link workbox-precaching.precacheAndRoute}.
+     *
+     * @param {Array<Object|string>} [entries=[]] Array of entries to precache.
+     *
+     * @memberof workbox-precaching
+     */
+    function precache(entries) {
+      const precacheController = getOrCreatePrecacheController();
+      precacheController.precache(entries);
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * This method will add entries to the precache list and add a route to
+     * respond to fetch events.
+     *
+     * This is a convenience method that will call
+     * {@link workbox-precaching.precache} and
+     * {@link workbox-precaching.addRoute} in a single call.
+     *
+     * @param {Array<Object|string>} entries Array of entries to precache.
+     * @param {Object} [options] See the
+     * {@link workbox-precaching.PrecacheRoute} options.
+     *
+     * @memberof workbox-precaching
+     */
+    function precacheAndRoute(entries, options) {
+      precache(entries);
+      addRoute(options);
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    const SUBSTRING_TO_FIND = '-precache-';
+    /**
+     * Cleans up incompatible precaches that were created by older versions of
+     * Workbox, by a service worker registered under the current scope.
+     *
+     * This is meant to be called as part of the `activate` event.
+     *
+     * This should be safe to use as long as you don't include `substringToFind`
+     * (defaulting to `-precache-`) in your non-precache cache names.
+     *
+     * @param {string} currentPrecacheName The cache name currently in use for
+     * precaching. This cache won't be deleted.
+     * @param {string} [substringToFind='-precache-'] Cache names which include this
+     * substring will be deleted (excluding `currentPrecacheName`).
+     * @return {Array<string>} A list of all the cache names that were deleted.
+     *
+     * @private
+     * @memberof workbox-precaching
+     */
+    const deleteOutdatedCaches = async (currentPrecacheName, substringToFind = SUBSTRING_TO_FIND) => {
+      const cacheNames = await self.caches.keys();
+      const cacheNamesToDelete = cacheNames.filter(cacheName => {
+        return cacheName.includes(substringToFind) && cacheName.includes(self.registration.scope) && cacheName !== currentPrecacheName;
+      });
+      await Promise.all(cacheNamesToDelete.map(cacheName => self.caches.delete(cacheName)));
+      return cacheNamesToDelete;
+    };
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Adds an `activate` event listener which will clean up incompatible
+     * precaches that were created by older versions of Workbox.
+     *
+     * @memberof workbox-precaching
+     */
+    function cleanupOutdatedCaches() {
+      // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+      self.addEventListener('activate', event => {
+        const cacheName = cacheNames.getPrecacheName();
+        event.waitUntil(deleteOutdatedCaches(cacheName).then(cachesDeleted => {
+          {
+            if (cachesDeleted.length > 0) {
+              logger.log(`The following out-of-date precaches were cleaned up ` + `automatically:`, cachesDeleted);
+            }
+          }
+        }));
+      });
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * NavigationRoute makes it easy to create a
+     * {@link workbox-routing.Route} that matches for browser
+     * [navigation requests]{@link https://developers.google.com/web/fundamentals/primers/service-workers/high-performance-loading#first_what_are_navigation_requests}.
+     *
+     * It will only match incoming Requests whose
+     * {@link https://fetch.spec.whatwg.org/#concept-request-mode|mode}
+     * is set to `navigate`.
+     *
+     * You can optionally only apply this route to a subset of navigation requests
+     * by using one or both of the `denylist` and `allowlist` parameters.
+     *
+     * @memberof workbox-routing
+     * @extends workbox-routing.Route
+     */
+    class NavigationRoute extends Route {
+      /**
+       * If both `denylist` and `allowlist` are provided, the `denylist` will
+       * take precedence and the request will not match this route.
+       *
+       * The regular expressions in `allowlist` and `denylist`
+       * are matched against the concatenated
+       * [`pathname`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/pathname}
+       * and [`search`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search}
+       * portions of the requested URL.
+       *
+       * *Note*: These RegExps may be evaluated against every destination URL during
+       * a navigation. Avoid using
+       * [complex RegExps](https://github.com/GoogleChrome/workbox/issues/3077),
+       * or else your users may see delays when navigating your site.
+       *
+       * @param {workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       * @param {Object} options
+       * @param {Array<RegExp>} [options.denylist] If any of these patterns match,
+       * the route will not handle the request (even if a allowlist RegExp matches).
+       * @param {Array<RegExp>} [options.allowlist=[/./]] If any of these patterns
+       * match the URL's pathname and search parameter, the route will handle the
+       * request (assuming the denylist doesn't match).
+       */
+      constructor(handler, {
+        allowlist = [/./],
+        denylist = []
+      } = {}) {
+        {
+          finalAssertExports.isArrayOfClass(allowlist, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'NavigationRoute',
+            funcName: 'constructor',
+            paramName: 'options.allowlist'
+          });
+          finalAssertExports.isArrayOfClass(denylist, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'NavigationRoute',
+            funcName: 'constructor',
+            paramName: 'options.denylist'
+          });
+        }
+        super(options => this._match(options), handler);
+        this._allowlist = allowlist;
+        this._denylist = denylist;
+      }
+      /**
+       * Routes match handler.
+       *
+       * @param {Object} options
+       * @param {URL} options.url
+       * @param {Request} options.request
+       * @return {boolean}
+       *
+       * @private
+       */
+      _match({
+        url,
+        request
+      }) {
+        if (request && request.mode !== 'navigate') {
+          return false;
+        }
+        const pathnameAndSearch = url.pathname + url.search;
+        for (const regExp of this._denylist) {
+          if (regExp.test(pathnameAndSearch)) {
+            {
+              logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL matches this denylist pattern: ` + `${regExp.toString()}`);
+            }
+            return false;
+          }
+        }
+        if (this._allowlist.some(regExp => regExp.test(pathnameAndSearch))) {
+          {
+            logger.debug(`The navigation route ${pathnameAndSearch} ` + `is being used.`);
+          }
+          return true;
+        }
+        {
+          logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL being navigated to doesn't ` + `match the allowlist.`);
+        }
+        return false;
+      }
+    }
+
+    /*
+      Copyright 2019 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * Helper function that calls
+     * {@link PrecacheController#createHandlerBoundToURL} on the default
+     * {@link PrecacheController} instance.
+     *
+     * If you are creating your own {@link PrecacheController}, then call the
+     * {@link PrecacheController#createHandlerBoundToURL} on that instance,
+     * instead of using this function.
+     *
+     * @param {string} url The precached URL which will be used to lookup the
+     * `Response`.
+     * @param {boolean} [fallbackToNetwork=true] Whether to attempt to get the
+     * response from the network if there's a precache miss.
+     * @return {workbox-routing~handlerCallback}
+     *
+     * @memberof workbox-precaching
+     */
+    function createHandlerBoundToURL(url) {
+      const precacheController = getOrCreatePrecacheController();
+      return precacheController.createHandlerBoundToURL(url);
+    }
+
+    exports.CacheableResponsePlugin = CacheableResponsePlugin;
+    exports.ExpirationPlugin = ExpirationPlugin;
+    exports.NavigationRoute = NavigationRoute;
+    exports.NetworkFirst = NetworkFirst;
+    exports.cleanupOutdatedCaches = cleanupOutdatedCaches;
+    exports.clientsClaim = clientsClaim;
+    exports.createHandlerBoundToURL = createHandlerBoundToURL;
+    exports.precacheAndRoute = precacheAndRoute;
+    exports.registerRoute = registerRoute;
+
+}));
diff --git a/mengyamonitor-frontend/index.html b/mengyamonitor-frontend/index.html
index 3f0b36e..0cc17c1 100644
--- a/mengyamonitor-frontend/index.html
+++ b/mengyamonitor-frontend/index.html
@@ -2,11 +2,12 @@
 <html lang="zh-CN">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/logo.svg" />
-    <link rel="apple-touch-icon" href="/logo.svg" />
+    <link rel="icon" href="/favicon.ico" sizes="any" />
+    <link rel="apple-touch-icon" href="/logo2.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="theme-color" content="#1a1a2e" />
     <meta name="description" content="服务器监控面板 - 萌芽监控" />
+    <meta name="mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
     <meta name="apple-mobile-web-app-title" content="萌芽监控" />
diff --git a/mengyamonitor-frontend/package-lock.json b/mengyamonitor-frontend/package-lock.json
index 7088438..c7c6b22 100644
--- a/mengyamonitor-frontend/package-lock.json
+++ b/mengyamonitor-frontend/package-lock.json
@@ -8,9 +8,6 @@
       "name": "mengyamonitor-frontend",
       "version": "0.0.0",
       "dependencies": {
-        "@dnd-kit/core": "^6.3.1",
-        "@dnd-kit/sortable": "^10.0.0",
-        "@dnd-kit/utilities": "^3.2.2",
         "react": "^19.2.0",
         "react-dom": "^19.2.0"
       },
@@ -1586,59 +1583,6 @@
         "node": ">=6.9.0"
       }
     },
-    "node_modules/@dnd-kit/accessibility": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/@dnd-kit/accessibility/-/accessibility-3.1.1.tgz",
-      "integrity": "sha512-2P+YgaXF+gRsIihwwY1gCsQSYnu9Zyj2py8kY5fFvUM1qm2WA2u639R6YNVfU4GWr+ZM5mqEsfHZZLoRONbemw==",
-      "license": "MIT",
-      "dependencies": {
-        "tslib": "^2.0.0"
-      },
-      "peerDependencies": {
-        "react": ">=16.8.0"
-      }
-    },
-    "node_modules/@dnd-kit/core": {
-      "version": "6.3.1",
-      "resolved": "https://registry.npmjs.org/@dnd-kit/core/-/core-6.3.1.tgz",
-      "integrity": "sha512-xkGBRQQab4RLwgXxoqETICr6S5JlogafbhNsidmrkVv2YRs5MLwpjoF2qpiGjQt8S9AoxtIV603s0GIUpY5eYQ==",
-      "license": "MIT",
-      "dependencies": {
-        "@dnd-kit/accessibility": "^3.1.1",
-        "@dnd-kit/utilities": "^3.2.2",
-        "tslib": "^2.0.0"
-      },
-      "peerDependencies": {
-        "react": ">=16.8.0",
-        "react-dom": ">=16.8.0"
-      }
-    },
-    "node_modules/@dnd-kit/sortable": {
-      "version": "10.0.0",
-      "resolved": "https://registry.npmjs.org/@dnd-kit/sortable/-/sortable-10.0.0.tgz",
-      "integrity": "sha512-+xqhmIIzvAYMGfBYYnbKuNicfSsk4RksY2XdmJhT+HAC01nix6fHCztU68jooFiMUB01Ky3F0FyOvhG/BZrWkg==",
-      "license": "MIT",
-      "dependencies": {
-        "@dnd-kit/utilities": "^3.2.2",
-        "tslib": "^2.0.0"
-      },
-      "peerDependencies": {
-        "@dnd-kit/core": "^6.3.0",
-        "react": ">=16.8.0"
-      }
-    },
-    "node_modules/@dnd-kit/utilities": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/@dnd-kit/utilities/-/utilities-3.2.2.tgz",
-      "integrity": "sha512-+MKAJEOfaBe5SmV6t34p80MMKhjvUz0vRrvVJbPT0WElzaOJ/1xs+D+KDv+tD/NE5ujfrChEcshd4fLn0wpiqg==",
-      "license": "MIT",
-      "dependencies": {
-        "tslib": "^2.0.0"
-      },
-      "peerDependencies": {
-        "react": ">=16.8.0"
-      }
-    },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.25.12",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.12.tgz",
@@ -6606,12 +6550,6 @@
         "typescript": ">=4.8.4"
       }
     },
-    "node_modules/tslib": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
-      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "license": "0BSD"
-    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
diff --git a/mengyamonitor-frontend/package.json b/mengyamonitor-frontend/package.json
index 8903a70..66bb334 100644
--- a/mengyamonitor-frontend/package.json
+++ b/mengyamonitor-frontend/package.json
@@ -10,9 +10,6 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@dnd-kit/core": "^6.3.1",
-    "@dnd-kit/sortable": "^10.0.0",
-    "@dnd-kit/utilities": "^3.2.2",
     "react": "^19.2.0",
     "react-dom": "^19.2.0"
   },
diff --git a/mengyamonitor-frontend/public/favicon.ico b/mengyamonitor-frontend/public/favicon.ico
new file mode 100644
index 0000000..67c32ba
Binary files /dev/null and b/mengyamonitor-frontend/public/favicon.ico differ
diff --git a/mengyamonitor-frontend/public/logo.png b/mengyamonitor-frontend/public/logo.png
index eec06de..62856ba 100644
Binary files a/mengyamonitor-frontend/public/logo.png and b/mengyamonitor-frontend/public/logo.png differ
diff --git a/mengyamonitor-frontend/public/logo.svg b/mengyamonitor-frontend/public/logo.svg
deleted file mode 100644
index 70974ae..0000000
--- a/mengyamonitor-frontend/public/logo.svg
+++ /dev/null
@@ -1,16 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="none">
-  <defs>
-    <linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" style="stop-color:#1a1a2e"/>
-      <stop offset="100%" style="stop-color:#16213e"/>
-    </linearGradient>
-    <linearGradient id="leaf" x1="0%" y1="100%" x2="100%" y2="0%">
-      <stop offset="0%" style="stop-color:#4ecca3"/>
-      <stop offset="100%" style="stop-color:#2d8f7a"/>
-    </linearGradient>
-  </defs>
-  <rect width="512" height="512" rx="96" fill="url(#bg)"/>
-  <path fill="url(#leaf)" d="M256 96c-20 80-80 160-80 240 0 53 35.8 96 80 96s80-43 80-96c0-80-60-160-80-240z"/>
-  <path fill="url(#leaf)" opacity=".9" d="M256 96c20 80 60 160 60 240 0 53-35.8 96-80 96s-80-43-80-96c0-80 40-160 60-240z"/>
-  <ellipse cx="256" cy="336" rx="48" ry="24" fill="url(#leaf)" opacity=".7"/>
-</svg>
diff --git a/mengyamonitor-frontend/src/App.css b/mengyamonitor-frontend/src/App.css
index 7522e95..f29a172 100644
--- a/mengyamonitor-frontend/src/App.css
+++ b/mengyamonitor-frontend/src/App.css
@@ -1,8 +1,9 @@
 .app {
+  position: relative;
   width: 100%;
   max-width: 100%;
   margin: 0 auto;
-  padding: 1rem;
+  padding: 0.65rem 0.75rem 0.85rem;
   min-height: 100vh;
 }
 
@@ -10,12 +11,14 @@
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 1rem;
-  padding: 0.5rem 1rem;
+  margin-bottom: 0.65rem;
+  padding: 0.4rem 0.85rem;
   background: var(--surface-color);
-  border-radius: var(--radius-md);
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border-radius: var(--radius-glass);
   box-shadow: var(--shadow-sm);
-  border: 1px solid var(--border-color);
+  border: 1px solid var(--glass-border);
   transition: all 0.3s ease;
 }
 
@@ -27,27 +30,29 @@
 
 .app-header h1 {
   margin: 0;
-  font-size: 1.5rem;
+  font-size: 1.2rem;
   color: var(--text-main);
   display: flex;
   align-items: center;
-  gap: 0.75rem;
-  font-weight: 600;
-  transform: translateY(-3px);
+  gap: 0.55rem;
+  font-weight: 700;
+  transform: translateY(-1px);
+  letter-spacing: -0.02em;
 }
 
 .app-logo {
-  width: 36px;
-  height: 36px;
-  border-radius: 6px;
+  width: 32px;
+  height: 32px;
+  border-radius: var(--radius-md);
   display: inline-block;
+  object-fit: contain;
 }
 
 .btn-icon {
-  background: var(--surface-color);
+  background: rgba(255, 255, 255, 0.35);
   color: var(--text-main);
-  border: 1px solid var(--border-color);
-  padding: 0.5rem;
+  border: 1px solid var(--glass-border);
+  padding: 0.45rem;
   width: 32px;
   height: 32px;
   border-radius: var(--radius-md);
@@ -183,18 +188,20 @@
 
 .server-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
-  gap: 1.5rem;
+  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
+  gap: 0.75rem;
 }
 
 .empty-state {
   grid-column: 1 / -1;
   text-align: center;
-  padding: 4rem 2rem;
+  padding: 2rem 1.25rem;
   background: var(--surface-color);
-  border-radius: var(--radius-lg);
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border-radius: var(--radius-glass);
   box-shadow: var(--shadow-sm);
-  border: 1px dashed var(--border-color);
+  border: 1px dashed var(--glass-border);
 }
 
 .empty-state p {
@@ -208,6 +215,95 @@
   font-size: 0.875rem;
 }
 
+.logo-hit {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+  margin: 0;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  border-radius: var(--radius-md);
+}
+
+.logo-hit:focus-visible {
+  outline: 2px solid var(--primary-color);
+  outline-offset: 2px;
+}
+
+.token-gate-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1100;
+  background: rgba(10, 12, 22, 0.75);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 1rem;
+}
+
+.token-gate-dialog {
+  width: min(400px, 100%);
+  background: var(--surface-color);
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-glass);
+  padding: 1.1rem 1.25rem;
+  box-shadow: var(--shadow-md);
+}
+
+.token-gate-dialog h3 {
+  margin: 0 0 0.5rem;
+  font-size: 1.125rem;
+  color: var(--text-main);
+}
+
+.token-gate-hint {
+  margin: 0 0 1rem;
+  font-size: 0.8125rem;
+  color: var(--text-secondary);
+  line-height: 1.45;
+}
+
+.token-gate-input {
+  width: 100%;
+  box-sizing: border-box;
+  padding: 0.65rem 0.75rem;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-color);
+  background: var(--bg-color);
+  color: var(--text-main);
+  margin-bottom: 0.5rem;
+}
+
+.token-gate-error {
+  color: #f87171;
+  font-size: 0.8125rem;
+  margin: 0 0 0.75rem;
+}
+
+.token-gate-actions {
+  display: flex;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+.btn-cancel {
+  background: var(--surface-color);
+  color: var(--text-main);
+  border: 1px solid var(--border-color);
+  padding: 0.65rem 1.25rem;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  cursor: pointer;
+}
+
+.btn-cancel:hover {
+  border-color: var(--primary-color);
+}
+
 @media (max-width: 768px) {
   .app {
     padding: 1rem;
diff --git a/mengyamonitor-frontend/src/App.tsx b/mengyamonitor-frontend/src/App.tsx
index 151abe4..cb8a2c0 100644
--- a/mengyamonitor-frontend/src/App.tsx
+++ b/mengyamonitor-frontend/src/App.tsx
@@ -1,247 +1,210 @@
-import { useState, useEffect } from 'react';
-import type { ServerConfig } from './types';
-import { loadServers, saveServers, removeServer, exportServersToClipboard, importServersFromClipboard } from './utils/storage';
+import { useState, useEffect, useRef, useCallback } from 'react';
 import { useServerMonitor } from './hooks/useServerMonitor';
+import { usePublicServers } from './hooks/usePublicServers';
 import { ServerCard } from './components/ServerCard/ServerCard';
 import { ServerDetail } from './components/ServerDetail/ServerDetail';
+import { AdminPanel } from './components/AdminPanel/AdminPanel';
+import { RandomBackdrop } from './components/RandomBackdrop/RandomBackdrop';
 import {
-  DndContext,
-  closestCenter,
-  KeyboardSensor,
-  PointerSensor,
-  useSensor,
-  useSensors,
-} from '@dnd-kit/core';
-import type { DragEndEvent } from '@dnd-kit/core';
-import {
-  arrayMove,
-  SortableContext,
-  sortableKeyboardCoordinates,
-  rectSortingStrategy,
-} from '@dnd-kit/sortable';
+  verifyAdminToken,
+  ADMIN_TOKEN_STORAGE,
+} from './api/central';
 import './App.css';
 
-const formatServerUrl = (url: string) => {
-  let formatted = url.trim();
-  
-  // Fix common typo .op -> .top based on user requirement
-  if (formatted.endsWith('.op')) {
-    formatted = formatted.slice(0, -3) + '.top';
-  }
-
-  if (formatted && !/^https?:\/\//i.test(formatted)) {
-    return `http://${formatted}`;
-  }
-  return formatted;
-};
-
 function App() {
-  const [servers, setServers] = useState<ServerConfig[]>([]);
-  const [showAddForm, setShowAddForm] = useState(false);
+  const { servers, loading, error, reload } = usePublicServers(30000);
   const [selectedServerId, setSelectedServerId] = useState<string | null>(null);
-  const [newServerForm, setNewServerForm] = useState({ name: '', url: '' });
   const [showHeader, setShowHeader] = useState(true);
 
-  const statuses = useServerMonitor(servers, 2000);
+  const [showTokenGate, setShowTokenGate] = useState(false);
+  const [tokenInput, setTokenInput] = useState('');
+  const [tokenError, setTokenError] = useState<string | null>(null);
+  const [adminOpen, setAdminOpen] = useState(false);
 
-  const sensors = useSensors(
-    useSensor(PointerSensor),
-    useSensor(KeyboardSensor, {
-      coordinateGetter: sortableKeyboardCoordinates,
-    })
-  );
+  const logoClickCount = useRef(0);
+  const logoClickReset = useRef<ReturnType<typeof setTimeout> | null>(null);
 
-  useEffect(() => {
-    const loaded = loadServers();
-    setServers(loaded);
+  const statuses = useServerMonitor();
+
+  const handleLogoClick = useCallback(() => {
+    if (logoClickReset.current) {
+      clearTimeout(logoClickReset.current);
+    }
+    logoClickCount.current += 1;
+    if (logoClickCount.current >= 5) {
+      logoClickCount.current = 0;
+      const saved = sessionStorage.getItem(ADMIN_TOKEN_STORAGE);
+      if (saved) {
+        setAdminOpen(true);
+      } else {
+        setShowTokenGate(true);
+        setTokenInput('');
+        setTokenError(null);
+      }
+      return;
+    }
+    logoClickReset.current = setTimeout(() => {
+      logoClickCount.current = 0;
+    }, 2000);
   }, []);
 
-  const handleUrlBlur = () => {
-    const formatted = formatServerUrl(newServerForm.url);
-    if (formatted !== newServerForm.url) {
-      setNewServerForm(prev => ({ ...prev, url: formatted }));
-    }
-  };
-
-  const handleAddServer = () => {
-    if (!newServerForm.name || !newServerForm.url) {
-      alert('请填写服务器名称和地址');
+  const submitToken = async () => {
+    const ok = await verifyAdminToken(tokenInput.trim());
+    if (!ok) {
+      setTokenError('口令错误');
       return;
     }
+    sessionStorage.setItem(ADMIN_TOKEN_STORAGE, tokenInput.trim());
+    setShowTokenGate(false);
+    setTokenError(null);
+    setAdminOpen(true);
+  };
 
-    const formattedUrl = formatServerUrl(newServerForm.url);
+  const closeAdmin = () => {
+    setAdminOpen(false);
+  };
 
-    const newServer: ServerConfig = {
-      id: Date.now().toString(),
-      name: newServerForm.name,
-      url: formattedUrl,
-      enabled: true,
+  const invalidateAdminSession = () => {
+    sessionStorage.removeItem(ADMIN_TOKEN_STORAGE);
+    setAdminOpen(false);
+    alert('管理凭证已失效，请重新验证');
+  };
+
+  useEffect(() => {
+    return () => {
+      if (logoClickReset.current) clearTimeout(logoClickReset.current);
     };
-
-    const updated = [...servers, newServer];
-    setServers(updated);
-    saveServers(updated);
-    setNewServerForm({ name: '', url: '' });
-    setShowAddForm(false);
-  };
-
-  const handleRemoveServer = (serverId: string) => {
-    if (confirm('确定要移除这个服务器吗？')) {
-      const updated = servers.filter(s => s.id !== serverId);
-      setServers(updated);
-      removeServer(serverId);
-    }
-  };
-
-  const handleShowDetail = (serverId: string) => {
-    setSelectedServerId(serverId);
-  };
-
-  const handleExportServers = async () => {
-    try {
-      await exportServersToClipboard();
-      alert('服务器配置已复制到剪贴板！');
-    } catch (error) {
-      alert(error instanceof Error ? error.message : '导出失败');
-    }
-  };
-
-  const handleImportServers = async () => {
-    if (!confirm('导入服务器配置将添加到现有服务器列表中，是否继续？')) {
-      return;
-    }
-
-    try {
-      const importedServers = await importServersFromClipboard();
-      const updated = [...servers, ...importedServers];
-      setServers(updated);
-      saveServers(updated);
-      alert(`成功导入 ${importedServers.length} 个服务器配置！`);
-    } catch (error) {
-      alert(error instanceof Error ? error.message : '导入失败');
-    }
-  };
-
-  const handleDragEnd = (event: DragEndEvent) => {
-    const { active, over } = event;
-
-    if (over && active.id !== over.id) {
-      setServers((items) => {
-        const oldIndex = items.findIndex((item) => item.id === active.id);
-        const newIndex = items.findIndex((item) => item.id === over.id);
-        const newOrder = arrayMove(items, oldIndex, newIndex);
-        saveServers(newOrder);
-        return newOrder;
-      });
-    }
-  };
+  }, []);
 
   const selectedStatus = selectedServerId ? statuses[selectedServerId] : null;
-  const selectedServer = servers.find(s => s.id === selectedServerId);
+  const selectedServer = servers.find((s) => s.id === selectedServerId);
+
+  const adminToken = sessionStorage.getItem(ADMIN_TOKEN_STORAGE) || '';
 
   return (
     <div className="app">
+      <RandomBackdrop />
+      {showTokenGate && (
+        <div className="token-gate-overlay" role="dialog" aria-modal="true">
+          <div className="token-gate-dialog">
+            <h3>管理验证</h3>
+            <p className="token-gate-hint">请输入管理口令（内网默认与中心服务 ADMIN_TOKEN 一致）。</p>
+            <input
+              type="password"
+              className="token-gate-input"
+              placeholder="Token"
+              value={tokenInput}
+              onChange={(e) => {
+                setTokenInput(e.target.value);
+                setTokenError(null);
+              }}
+              autoFocus
+              onKeyDown={(e) => {
+                if (e.key === 'Enter') void submitToken();
+              }}
+            />
+            {tokenError && <p className="token-gate-error">{tokenError}</p>}
+            <div className="token-gate-actions">
+              <button type="button" className="btn-submit" onClick={() => void submitToken()}>
+                进入后台
+              </button>
+              <button
+                type="button"
+                className="btn-cancel"
+                onClick={() => {
+                  setShowTokenGate(false);
+                  setTokenError(null);
+                }}
+              >
+                取消
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {adminOpen && adminToken && (
+        <AdminPanel
+          token={adminToken}
+          onClose={closeAdmin}
+          onSessionInvalid={invalidateAdminSession}
+          onSaved={() => void reload()}
+        />
+      )}
+
       {!showHeader && (
         <button
           className="btn-show-header"
           onClick={() => setShowHeader(true)}
           title="显示导航栏"
+          type="button"
         >
           👁️
         </button>
       )}
-      
+
       {showHeader && (
         <header className="app-header">
           <h1>
-            <img className="app-logo" src="/logo.svg" alt="萌芽监控面板" />
+            <button
+              type="button"
+              className="logo-hit"
+              onClick={handleLogoClick}
+              title="萌芽监控"
+              aria-label="萌芽监控"
+            >
+              <img className="app-logo" src="/logo.png" alt="" />
+            </button>
             萌芽监控面板
           </h1>
           <div className="header-actions">
-            <button 
-              className="btn-icon" 
+            <button
+              type="button"
+              className="btn-icon"
               onClick={() => setShowHeader(false)}
               title="隐藏导航栏"
             >
               👁️
             </button>
-            <button 
-              className="btn-icon" 
-              onClick={handleExportServers} 
-              title="导出服务器配置到剪贴板"
-            >
-              📤
-            </button>
-          <button 
-            className="btn-icon" 
-            onClick={handleImportServers} 
-            title="从剪贴板导入服务器配置"
-          >
-            📥
-          </button>
-          <button className="btn-add" onClick={() => setShowAddForm(!showAddForm)} title={showAddForm ? '取消' : '添加服务器'}>
-            {showAddForm ? '×' : '+'}
-          </button>
-        </div>
-      </header>
-      )}
-
-      {showAddForm && (
-        <div className="add-form">
-          <input
-            type="text"
-            placeholder="服务器名称"
-            value={newServerForm.name}
-            onChange={(e) => setNewServerForm({ ...newServerForm, name: e.target.value })}
-          />
-          <input
-            type="text"
-            placeholder="服务器地址 (例如: http://192.168.1.100:9292)"
-            value={newServerForm.url}
-            onChange={(e) => setNewServerForm({ ...newServerForm, url: e.target.value })}
-            onBlur={handleUrlBlur}
-          />
-          <button className="btn-submit" onClick={handleAddServer}>
-            添加
-          </button>
-        </div>
+          </div>
+        </header>
       )}
 
       <main className="server-grid">
-        {servers.length === 0 ? (
+        {loading ? (
           <div className="empty-state">
-            <p>还没有添加任何服务器</p>
-            <p className="hint">点击右上角的"添加服务器"按钮开始使用</p>
+            <p>正在从中心服务加载节点列表…</p>
+          </div>
+        ) : error ? (
+          <div className="empty-state">
+            <p>无法加载监控列表</p>
+            <p className="hint">{error}</p>
+            <p className="hint">请确认 mengyamonitor-backend-server 已启动，且 VITE_CENTRAL_API_URL 或开发代理配置正确。</p>
+          </div>
+        ) : servers.length === 0 ? (
+          <div className="empty-state">
+            <p>暂无已启用的监控节点</p>
+            <p className="hint">请联系管理员在后台添加采集端地址。</p>
           </div>
         ) : (
-          <DndContext
-            sensors={sensors}
-            collisionDetection={closestCenter}
-            onDragEnd={handleDragEnd}
-          >
-            <SortableContext items={servers.map((s) => s.id)} strategy={rectSortingStrategy}>
-              {servers.map((server) => {
-                const status = statuses[server.id];
-                // Calculate storage usage (max of all mounts)
-                const storageUsage = status?.metrics?.storage?.reduce((max, s) => Math.max(max, s.usedPercent), 0) || 0;
-                
-                return (
-                  <ServerCard
-                    key={server.id}
-                    server={server}
-                    online={status?.online || false}
-                    metrics={status?.metrics}
-                    cpuUsage={status?.metrics?.cpu.usagePercent || 0}
-                    memoryUsage={status?.metrics?.memory.usedPercent || 0}
-                    storageUsage={storageUsage} // Pass max storage usage
-                    uptime={status?.metrics?.uptimeSeconds}
-                    onDetail={handleShowDetail}
-                    onRemove={handleRemoveServer}
-                  />
-                );
-              })}
-            </SortableContext>
-          </DndContext>
+          servers.map((server) => {
+            const status = statuses[server.id];
+            const storageUsage =
+              status?.metrics?.storage?.reduce((max, s) => Math.max(max, s.usedPercent), 0) || 0;
+            return (
+              <ServerCard
+                key={server.id}
+                server={server}
+                online={status?.online || false}
+                metrics={status?.metrics}
+                cpuUsage={status?.metrics?.cpu.usagePercent || 0}
+                memoryUsage={status?.metrics?.memory.usedPercent || 0}
+                storageUsage={storageUsage}
+                uptime={status?.metrics?.uptimeSeconds}
+                onDetail={() => setSelectedServerId(server.id)}
+              />
+            );
+          })
         )}
       </main>
 
diff --git a/mengyamonitor-frontend/src/api/central.ts b/mengyamonitor-frontend/src/api/central.ts
new file mode 100644
index 0000000..d90a11f
--- /dev/null
+++ b/mengyamonitor-frontend/src/api/central.ts
@@ -0,0 +1,109 @@
+/** Central dashboard API base (no trailing slash). Dev default uses Vite proxy. */
+export const centralApiBase = (): string => {
+  const v = import.meta.env.VITE_CENTRAL_API_URL as string | undefined;
+  return (v && v.trim()) || '/central-api';
+};
+
+export async function fetchPublicServers(): Promise<
+  { id: string; name: string; url: string; enabled: boolean }[]
+> {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/servers`);
+  if (!res.ok) {
+    throw new Error(`无法加载服务器列表 (${res.status})`);
+  }
+  const body = await res.json();
+  const data = body.data;
+  if (!Array.isArray(data)) {
+    throw new Error('无效的服务器列表响应');
+  }
+  return data;
+}
+
+export async function verifyAdminToken(token: string): Promise<boolean> {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/auth`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ token }),
+  });
+  return res.ok;
+}
+
+const adminHeaders = (token: string, json = false): HeadersInit => {
+  const h: Record<string, string> = { 'X-Admin-Token': token };
+  if (json) h['Content-Type'] = 'application/json';
+  return h;
+};
+
+export async function adminListServers(token: string) {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/servers`, { headers: adminHeaders(token) });
+  if (res.status === 401) throw new Error('UNAUTHORIZED');
+  if (!res.ok) throw new Error(`加载失败 (${res.status})`);
+  const body = await res.json();
+  return body.data as {
+    id: string;
+    name: string;
+    url: string;
+    enabled: boolean;
+    sortOrder: number;
+    agentKey?: string;
+  }[];
+}
+
+export async function adminCreateServer(
+  token: string,
+  payload: { name: string; url?: string; enabled: boolean }
+) {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/servers`, {
+    method: 'POST',
+    headers: adminHeaders(token, true),
+    body: JSON.stringify(payload),
+  });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error((err as { error?: string }).error || `创建失败 (${res.status})`);
+  }
+  return (await res.json()).data;
+}
+
+export async function adminUpdateServer(
+  token: string,
+  id: string,
+  payload: { name: string; url?: string; enabled: boolean; agentKey?: string }
+) {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/servers/${encodeURIComponent(id)}`, {
+    method: 'PUT',
+    headers: adminHeaders(token, true),
+    body: JSON.stringify(payload),
+  });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error((err as { error?: string }).error || `更新失败 (${res.status})`);
+  }
+  return (await res.json()).data;
+}
+
+export async function adminDeleteServer(token: string, id: string) {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/servers/${encodeURIComponent(id)}`, {
+    method: 'DELETE',
+    headers: adminHeaders(token, false),
+  });
+  if (!res.ok) throw new Error(`删除失败 (${res.status})`);
+}
+
+export async function adminReorderServers(token: string, ids: string[]) {
+  const base = centralApiBase();
+  const res = await fetch(`${base}/api/admin/servers/reorder`, {
+    method: 'PUT',
+    headers: adminHeaders(token, true),
+    body: JSON.stringify({ ids }),
+  });
+  if (!res.ok) throw new Error(`排序失败 (${res.status})`);
+}
+
+export const ADMIN_TOKEN_STORAGE = 'mengya_monitor_admin_token';
diff --git a/mengyamonitor-frontend/src/api/monitor.ts b/mengyamonitor-frontend/src/api/monitor.ts
deleted file mode 100644
index a5b22e4..0000000
--- a/mengyamonitor-frontend/src/api/monitor.ts
+++ /dev/null
@@ -1,101 +0,0 @@
-import type { ServerMetrics } from '../types';
-
-export const fetchServerMetrics = async (serverUrl: string): Promise<ServerMetrics> => {
-  // 测量客户端到服务器的延迟（使用健康检查端点）
-  const clientToServerLatency = await measureLatency(`${serverUrl}/api/health`);
-  
-  // 并行请求各个端点
-  const endpoints = [
-    '/api/metrics/cpu',
-    '/api/metrics/memory',
-    '/api/metrics/storage',
-    '/api/metrics/gpu',
-    '/api/metrics/network',
-    '/api/metrics/system',
-    '/api/metrics/docker',
-    '/api/metrics/latency',
-  ];
-
-  const results = await Promise.all(
-    endpoints.map(endpoint =>
-      fetch(`${serverUrl}${endpoint}`, {
-        method: 'GET',
-        headers: {
-          'Content-Type': 'application/json',
-        },
-      })
-        .then(res => {
-          if (!res.ok) throw new Error(`Failed to fetch ${endpoint}`);
-          return res.json();
-        })
-        .catch(err => {
-          console.error(`Error fetching ${endpoint}:`, err);
-          return null;
-        })
-    )
-  );
-
-  // 合并所有结果
-  const [cpuRes, memRes, storageRes, gpuRes, networkRes, systemRes, dockerRes, latencyRes] = results;
-
-  const system = systemRes?.data || {};
-  const docker = dockerRes?.data || {};
-  const latency = latencyRes?.data || {};
-  
-  // 将 docker 数据合并到 system.dockerStats
-  return {
-    hostname: system.hostname || 'Unknown',
-    timestamp: new Date().toISOString(),
-    cpu: cpuRes?.data || {},
-    memory: memRes?.data || {},
-    storage: storageRes?.data || [],
-    gpu: gpuRes?.data || [],
-    network: networkRes?.data || [],
-    system: {
-      ...system,
-      dockerStats: docker
-    },
-    os: system.os || { kernel: '', distro: '', architecture: '' },
-    uptimeSeconds: system.uptimeSeconds || 0,
-    latency: {
-      clientToServer: clientToServerLatency,
-      external: latency.external || {},
-    },
-  };
-};
-
-// 测量延迟
-async function measureLatency(url: string): Promise<number> {
-  try {
-    const startTime = performance.now();
-    const response = await fetch(url, {
-      method: 'GET',
-      headers: {
-        'Content-Type': 'application/json',
-      },
-    });
-    const endTime = performance.now();
-    
-    if (response.ok) {
-      return Math.round(endTime - startTime);
-    }
-    return -1; // 表示失败
-  } catch {
-    return -1; // 表示超时或失败
-  }
-}
-
-export const checkServerHealth = async (serverUrl: string): Promise<boolean> => {
-  try {
-    const url = `${serverUrl}/api/health`;
-    const response = await fetch(url, {
-      method: 'GET',
-      headers: {
-        'Content-Type': 'application/json',
-      },
-    });
-    return response.ok;
-  } catch {
-    return false;
-  }
-};
diff --git a/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.css b/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.css
new file mode 100644
index 0000000..06bee05
--- /dev/null
+++ b/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.css
@@ -0,0 +1,202 @@
+.admin-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(10, 12, 22, 0.72);
+  z-index: 1000;
+  display: flex;
+  align-items: flex-start;
+  justify-content: center;
+  padding: 2rem 1rem;
+  overflow: auto;
+}
+
+.admin-panel {
+  width: min(1100px, 100%);
+  background: var(--surface-color);
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-glass);
+  box-shadow: var(--shadow-lg);
+  padding: 1rem 1.15rem 1.25rem;
+}
+
+.admin-panel-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 0.75rem;
+}
+
+.admin-panel-header h2 {
+  margin: 0;
+  font-size: 1.25rem;
+  color: var(--text-main);
+}
+
+.admin-close {
+  background: transparent;
+  border: none;
+  color: var(--text-secondary);
+  font-size: 1.75rem;
+  line-height: 1;
+  cursor: pointer;
+  padding: 0.25rem 0.5rem;
+  border-radius: var(--radius-md);
+}
+
+.admin-close:hover {
+  background: var(--bg-color);
+  color: var(--text-main);
+}
+
+.admin-hint {
+  margin: 0 0 1rem;
+  font-size: 0.875rem;
+  color: var(--text-secondary);
+  line-height: 1.5;
+}
+
+.admin-loading {
+  color: var(--text-secondary);
+}
+
+.admin-error {
+  color: #f87171;
+  margin-bottom: 0.75rem;
+}
+
+.admin-table-wrap {
+  overflow-x: auto;
+}
+
+.admin-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.875rem;
+}
+
+.admin-table th,
+.admin-table td {
+  text-align: left;
+  padding: 0.5rem 0.6rem;
+  border-bottom: 1px solid var(--border-color);
+  vertical-align: middle;
+}
+
+.admin-table th {
+  color: var(--text-secondary);
+  font-weight: 600;
+}
+
+.admin-table code {
+  font-size: 0.8rem;
+  word-break: break-all;
+}
+
+.admin-table input[type='text'] {
+  width: 100%;
+  max-width: 280px;
+  padding: 0.35rem 0.5rem;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-color);
+  background: var(--bg-color);
+  color: var(--text-main);
+}
+
+.admin-url-input {
+  max-width: 360px !important;
+}
+
+.admin-order-btns {
+  display: flex;
+  gap: 0.25rem;
+}
+
+.admin-order-btns button {
+  padding: 0.2rem 0.45rem;
+  font-size: 0.75rem;
+  cursor: pointer;
+  border-radius: var(--radius-sm);
+  border: 1px solid var(--border-color);
+  background: var(--bg-color);
+  color: var(--text-main);
+}
+
+.admin-order-btns button:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+}
+
+.admin-actions {
+  white-space: nowrap;
+}
+
+.admin-actions .admin-btn + .admin-btn {
+  margin-left: 0.35rem;
+}
+
+.admin-btn {
+  padding: 0.35rem 0.65rem;
+  font-size: 0.8rem;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-color);
+  background: var(--surface-color);
+  color: var(--text-main);
+  cursor: pointer;
+}
+
+.admin-btn:hover {
+  border-color: var(--primary-color);
+}
+
+.admin-btn.danger {
+  border-color: #b91c1c;
+  color: #fecaca;
+}
+
+.admin-btn.danger:hover {
+  background: rgba(185, 28, 28, 0.2);
+}
+
+.admin-server-id-cell,
+.admin-agent-key-cell {
+  vertical-align: top;
+  max-width: 22rem;
+}
+
+.admin-agent-key-cell .admin-key {
+  display: block;
+  margin-bottom: 0.35rem;
+}
+
+.admin-server-id {
+  display: block;
+  font-size: 0.68rem;
+  line-height: 1.35;
+  word-break: break-all;
+  margin-bottom: 0.35rem;
+  color: var(--text-main);
+}
+
+.admin-btn-ghost {
+  padding: 0.2rem 0.45rem;
+  font-size: 0.72rem;
+}
+
+.admin-key {
+  font-size: 0.75rem;
+  word-break: break-all;
+  cursor: help;
+}
+
+.admin-muted {
+  color: var(--text-secondary);
+  font-size: 0.8rem;
+}
+
+.admin-empty {
+  text-align: center;
+  color: var(--text-secondary);
+  padding: 1.5rem !important;
+}
diff --git a/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.tsx b/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.tsx
new file mode 100644
index 0000000..4766c5b
--- /dev/null
+++ b/mengyamonitor-frontend/src/components/AdminPanel/AdminPanel.tsx
@@ -0,0 +1,279 @@
+import { useState, useEffect, useCallback } from 'react';
+import {
+  adminListServers,
+  adminUpdateServer,
+  adminDeleteServer,
+  adminReorderServers,
+} from '../../api/central';
+import './AdminPanel.css';
+
+type Row = { id: string; name: string; url: string; enabled: boolean; sortOrder: number; agentKey?: string };
+
+const formatServerUrl = (url: string) => {
+  let formatted = url.trim();
+  if (formatted.endsWith('.op')) {
+    formatted = formatted.slice(0, -3) + '.top';
+  }
+  if (formatted && !/^https?:\/\//i.test(formatted)) {
+    return `http://${formatted}`;
+  }
+  return formatted;
+};
+
+export const AdminPanel = ({
+  token,
+  onClose,
+  onSessionInvalid,
+  onSaved,
+}: {
+  token: string;
+  onClose: () => void;
+  onSessionInvalid: () => void;
+  onSaved?: () => void;
+}) => {
+  const [rows, setRows] = useState<Row[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [err, setErr] = useState<string | null>(null);
+  const [editId, setEditId] = useState<string | null>(null);
+  const [editForm, setEditForm] = useState({ name: '', url: '', enabled: true });
+
+  const load = useCallback(async () => {
+    setErr(null);
+    try {
+      const list = await adminListServers(token);
+      setRows(list);
+    } catch (e) {
+      if (e instanceof Error && e.message === 'UNAUTHORIZED') {
+        onSessionInvalid();
+        return;
+      }
+      setErr(e instanceof Error ? e.message : '加载失败');
+    } finally {
+      setLoading(false);
+    }
+  }, [token, onSessionInvalid]);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  const startEdit = (r: Row) => {
+    setEditId(r.id);
+    setEditForm({ name: r.name, url: r.url, enabled: r.enabled });
+  };
+
+  const saveEdit = async () => {
+    if (!editId) return;
+    try {
+      const u = editForm.url.trim();
+      await adminUpdateServer(token, editId, {
+        name: editForm.name.trim(),
+        ...(u ? { url: formatServerUrl(u) } : { url: '' }),
+        enabled: editForm.enabled,
+      });
+      setEditId(null);
+      await load();
+      onSaved?.();
+    } catch (e) {
+      alert(e instanceof Error ? e.message : '保存失败');
+    }
+  };
+
+  const remove = async (id: string) => {
+    if (!confirm('确定删除该监控节点？')) return;
+    try {
+      await adminDeleteServer(token, id);
+      await load();
+      onSaved?.();
+    } catch (e) {
+      alert(e instanceof Error ? e.message : '删除失败');
+    }
+  };
+
+  const copyServerId = useCallback((id: string) => {
+    void navigator.clipboard.writeText(id).catch(() => {
+      window.prompt('请手动复制（环境变量 SERVER_ID）', id);
+    });
+  }, []);
+
+  const copyAgentKey = useCallback((key: string) => {
+    void navigator.clipboard.writeText(key).catch(() => {
+      window.prompt('请手动复制（环境变量 AGENT_KEY）', key);
+    });
+  }, []);
+
+  const move = async (index: number, dir: -1 | 1) => {
+    const j = index + dir;
+    if (j < 0 || j >= rows.length) return;
+    const next = [...rows];
+    [next[index], next[j]] = [next[j], next[index]];
+    const ids = next.map((r) => r.id);
+    setRows(next);
+    try {
+      await adminReorderServers(token, ids);
+      await load();
+      onSaved?.();
+    } catch (e) {
+      alert(e instanceof Error ? e.message : '排序失败');
+      void load();
+    }
+  };
+
+  return (
+    <div className="admin-overlay" role="dialog" aria-modal="true">
+      <div className="admin-panel">
+        <div className="admin-panel-header">
+          <h2>监控管理后台</h2>
+          <button type="button" className="admin-close" onClick={onClose} title="关闭">
+            ×
+          </button>
+        </div>
+        <p className="admin-hint">
+          节点由采集端 gRPC 上报后出现在列表中。环境变量 CENTRAL_GRPC、<strong>SERVER_ID 须为下表「节点 ID」列的完整 UUID</strong>
+          （勿把「名称」当成 SERVER_ID）、AGENT_KEY 与「节点密钥」一致。看板经 WebSocket
+          拉取中心内存快照；「备注链接」可选，可在行内编辑。
+        </p>
+
+        {loading ? (
+          <p className="admin-loading">加载中…</p>
+        ) : (
+          <>
+            {err && <p className="admin-error">{err}</p>}
+
+            <div className="admin-table-wrap">
+              <table className="admin-table">
+                <thead>
+                  <tr>
+                    <th>顺序</th>
+                    <th>名称</th>
+                    <th>节点 ID（SERVER_ID）</th>
+                    <th>备注链接</th>
+                    <th>节点密钥 (gRPC)</th>
+                    <th>启用</th>
+                    <th />
+                  </tr>
+                </thead>
+                <tbody>
+                  {rows.length === 0 ? (
+                    <tr>
+                      <td colSpan={7} className="admin-empty">
+                        暂无节点；请确认采集端已配置并连接中心，成功上报后将显示在此。
+                      </td>
+                    </tr>
+                  ) : (
+                    rows.map((r, i) => (
+                      <tr key={r.id}>
+                        <td>
+                          <div className="admin-order-btns">
+                            <button type="button" title="上移" onClick={() => void move(i, -1)} disabled={i === 0}>
+                              ↑
+                            </button>
+                            <button
+                              type="button"
+                              title="下移"
+                              onClick={() => void move(i, 1)}
+                              disabled={i === rows.length - 1}
+                            >
+                              ↓
+                            </button>
+                          </div>
+                        </td>
+                        <td>
+                          {editId === r.id ? (
+                            <input
+                              value={editForm.name}
+                              onChange={(e) => setEditForm({ ...editForm, name: e.target.value })}
+                            />
+                          ) : (
+                            r.name
+                          )}
+                        </td>
+                        <td className="admin-server-id-cell">
+                          <code className="admin-server-id" title={r.id}>
+                            {r.id}
+                          </code>
+                          <button
+                            type="button"
+                            className="admin-btn admin-btn-ghost"
+                            title="复制为采集端 SERVER_ID"
+                            onClick={() => copyServerId(r.id)}
+                          >
+                            复制
+                          </button>
+                        </td>
+                        <td>
+                          {editId === r.id ? (
+                            <input
+                              className="admin-url-input"
+                              value={editForm.url}
+                              onChange={(e) => setEditForm({ ...editForm, url: e.target.value })}
+                            />
+                          ) : r.url ? (
+                            <code>{r.url}</code>
+                          ) : (
+                            <span className="admin-muted">—</span>
+                          )}
+                        </td>
+                        <td className="admin-agent-key-cell">
+                          {r.agentKey ? (
+                            <>
+                              <code className="admin-key" title={r.agentKey}>
+                                {r.agentKey.slice(0, 8)}…
+                              </code>
+                              <button
+                                type="button"
+                                className="admin-btn admin-btn-ghost"
+                                title="复制完整 AGENT_KEY（写入采集端配置）"
+                                onClick={() => copyAgentKey(r.agentKey!)}
+                              >
+                                复制
+                              </button>
+                            </>
+                          ) : (
+                            <span className="admin-muted">—</span>
+                          )}
+                        </td>
+                        <td>
+                          {editId === r.id ? (
+                            <input
+                              type="checkbox"
+                              checked={editForm.enabled}
+                              onChange={(e) => setEditForm({ ...editForm, enabled: e.target.checked })}
+                            />
+                          ) : (
+                            <span>{r.enabled ? '是' : '否'}</span>
+                          )}
+                        </td>
+                        <td className="admin-actions">
+                          {editId === r.id ? (
+                            <>
+                              <button type="button" className="admin-btn" onClick={() => void saveEdit()}>
+                                保存
+                              </button>
+                              <button type="button" className="admin-btn" onClick={() => setEditId(null)}>
+                                取消
+                              </button>
+                            </>
+                          ) : (
+                            <>
+                              <button type="button" className="admin-btn" onClick={() => startEdit(r)}>
+                                编辑
+                              </button>
+                              <button type="button" className="admin-btn danger" onClick={() => void remove(r.id)}>
+                                删除
+                              </button>
+                            </>
+                          )}
+                        </td>
+                      </tr>
+                    ))
+                  )}
+                </tbody>
+              </table>
+            </div>
+          </>
+        )}
+      </div>
+    </div>
+  );
+};
diff --git a/mengyamonitor-frontend/src/components/Common/CircularProgress.css b/mengyamonitor-frontend/src/components/Common/CircularProgress.css
deleted file mode 100644
index 95634c9..0000000
--- a/mengyamonitor-frontend/src/components/Common/CircularProgress.css
+++ /dev/null
@@ -1,41 +0,0 @@
-.circular-progress {
-  position: relative;
-  display: inline-block;
-}
-
-.circular-progress svg {
-  transform: rotate(-90deg);
-}
-
-.progress-ring-bg {
-  fill: none;
-  stroke: #e2e8f0;
-  transition: stroke 0.3s ease;
-}
-
-.progress-ring-circle {
-  fill: none;
-  stroke-linecap: round;
-  transition: stroke-dashoffset 0.5s ease;
-}
-
-.progress-value {
-  font-weight: 700;
-  fill: var(--text-main);
-  transform: rotate(90deg);
-  transform-origin: center;
-}
-
-.progress-label {
-  fill: var(--text-secondary);
-  font-weight: 500;
-  transform: rotate(90deg);
-  transform-origin: center;
-}
-
-.progress-sublabel {
-  fill: var(--text-light);
-  font-weight: 400;
-  transform: rotate(90deg);
-  transform-origin: center;
-}
diff --git a/mengyamonitor-frontend/src/components/Common/CircularProgress.tsx b/mengyamonitor-frontend/src/components/Common/CircularProgress.tsx
deleted file mode 100644
index d20a3ec..0000000
--- a/mengyamonitor-frontend/src/components/Common/CircularProgress.tsx
+++ /dev/null
@@ -1,83 +0,0 @@
-import './CircularProgress.css';
-
-interface CircularProgressProps {
-  value: number;
-  label: string;
-  color?: string;
-  size?: number;
-  subLabel?: string;
-}
-
-export const CircularProgress = ({ 
-  value, 
-  label, 
-  color = 'var(--primary-color)',
-  size = 150,
-  subLabel
-}: CircularProgressProps) => {
-  const radius = size * 0.36; // 36% of size
-  const circumference = 2 * Math.PI * radius;
-  const offset = circumference - (value / 100) * circumference;
-  const center = size / 2;
-  
-  // 根据尺寸动态计算字体大小
-  const valueFontSize = size * 0.12; // 12% of size
-  const subLabelFontSize = size * 0.08; // 8% of size
-  const labelFontSize = size * 0.09; // 9% of size
-  
-  return (
-    <div className="circular-progress" style={{ width: size, height: size }}>
-      <svg width={size} height={size} viewBox={`0 0 ${size} ${size}`}>
-        <circle
-          className="progress-ring-bg"
-          cx={center}
-          cy={center}
-          r={radius}
-          strokeWidth={size * 0.08}
-        />
-        <circle
-          className="progress-ring-circle"
-          stroke={color}
-          strokeDasharray={`${circumference} ${circumference}`}
-          strokeDashoffset={offset}
-          cx={center}
-          cy={center}
-          r={radius}
-          strokeWidth={size * 0.08}
-        />
-        {subLabel ? (
-          <text 
-            x={center} 
-            y={center} 
-            className="progress-value" 
-            textAnchor="middle" 
-            dy="0.3em"
-            fontSize={subLabelFontSize}
-          >
-            {subLabel}
-          </text>
-        ) : (
-          <text 
-            x={center} 
-            y={center} 
-            className="progress-value" 
-            textAnchor="middle" 
-            dy="0.3em"
-            fontSize={valueFontSize}
-          >
-            {Math.round(value)}%
-          </text>
-        )}
-        <text 
-          x={center} 
-          y={center + size * 0.22} 
-          className="progress-label" 
-          textAnchor="middle"
-          fontSize={labelFontSize}
-        >
-          {label}
-        </text>
-      </svg>
-    </div>
-  );
-};
diff --git a/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.css b/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.css
new file mode 100644
index 0000000..646762b
--- /dev/null
+++ b/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.css
@@ -0,0 +1,29 @@
+.random-backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: 0; /* 低于 #root (z-index: 1)，保证监控卡片与顶栏在上层 */
+  pointer-events: none;
+  overflow: hidden;
+}
+
+/* 略放大并外扩，减轻模糊后边缘露底 */
+.random-backdrop__image {
+  position: absolute;
+  inset: -16px;
+  background-size: cover;
+  background-position: center;
+  background-repeat: no-repeat;
+  transform: scale(1.04);
+  /* 需求「10%」按常用约定映射为 10px 半径（CSS blur 无百分比） */
+  filter: blur(10px);
+  -webkit-filter: blur(10px);
+}
+
+.random-backdrop__fallback {
+  position: absolute;
+  inset: 0;
+  background:
+    radial-gradient(120% 80% at 20% 20%, rgba(252, 231, 243, 0.95) 0%, transparent 55%),
+    radial-gradient(100% 90% at 80% 30%, rgba(224, 231, 255, 0.9) 0%, transparent 50%),
+    linear-gradient(160deg, #fdf4ff 0%, #e0f2fe 45%, #fce7f3 100%);
+}
diff --git a/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.tsx b/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.tsx
new file mode 100644
index 0000000..08ab9a2
--- /dev/null
+++ b/mengyamonitor-frontend/src/components/RandomBackdrop/RandomBackdrop.tsx
@@ -0,0 +1,49 @@
+import { useState, useEffect } from 'react';
+import { createPortal } from 'react-dom';
+import './RandomBackdrop.css';
+
+const RANDBG_JSON =
+  'https://randbg.api.smyhub.com/api/random?format=json&mode=auto';
+
+type RandomBgResponse = {
+  url?: string;
+};
+
+/** 挂到 body，避免与 .app 内 filter/层叠上下文叠在一起盖住卡片 */
+export const RandomBackdrop = () => {
+  const [imageUrl, setImageUrl] = useState<string | null>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    void fetch(RANDBG_JSON)
+      .then((r) => {
+        if (!r.ok) throw new Error(String(r.status));
+        return r.json() as Promise<RandomBgResponse>;
+      })
+      .then((data) => {
+        const u = data?.url;
+        if (!cancelled && typeof u === 'string' && u.length > 0) {
+          setImageUrl(u);
+        }
+      })
+      .catch(() => {
+        /* 保持 fallback 底色 */
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  return createPortal(
+    <div className="random-backdrop" aria-hidden>
+      {!imageUrl && <div className="random-backdrop__fallback" />}
+      {imageUrl && (
+        <div
+          className="random-backdrop__image"
+          style={{ backgroundImage: `url(${imageUrl})` }}
+        />
+      )}
+    </div>,
+    document.body
+  );
+};
diff --git a/mengyamonitor-frontend/src/components/ServerCard/ServerCard.css b/mengyamonitor-frontend/src/components/ServerCard/ServerCard.css
index e69f0b2..6e0e634 100644
--- a/mengyamonitor-frontend/src/components/ServerCard/ServerCard.css
+++ b/mengyamonitor-frontend/src/components/ServerCard/ServerCard.css
@@ -1,23 +1,27 @@
 .server-card {
   background: var(--surface-color);
-  border-radius: var(--radius-lg);
-  padding: 1.5rem;
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border-radius: var(--radius-glass);
+  padding: 0.85rem 1rem;
   box-shadow: var(--shadow-sm);
   transition: all 0.3s ease;
-  border: 1px solid var(--border-color);
+  border: 1px solid var(--glass-border);
   display: flex;
   flex-direction: column;
-  height: 100%;
+  min-height: 248px;
+  height: auto;
 }
 
 .server-card:hover {
-  box-shadow: var(--shadow-lg);
-  transform: translateY(-4px);
-  border-color: var(--primary-color);
+  box-shadow: var(--shadow-md);
+  border-color: rgba(255, 255, 255, 0.75);
+  background: var(--surface-hover);
 }
 
 .server-card.online {
-  border-top: 4px solid var(--success-color);
+  border-top: 3px solid var(--primary-color);
+  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.6);
 }
 
 .server-card.offline {
@@ -29,13 +33,7 @@
   display: flex;
   justify-content: space-between;
   align-items: flex-start;
-  margin-bottom: 0.5rem;
-  cursor: grab;
-  user-select: none;
-}
-
-.card-header:active {
-  cursor: grabbing;
+  margin-bottom: 0.35rem;
 }
 
 .server-info {
@@ -53,25 +51,6 @@
 
 .status-online {
   background: var(--success-color);
-  box-shadow: 0 0 0 4px rgba(134, 239, 172, 0.2);
-}
-
-.status-online::after {
-  content: '';
-  position: absolute;
-  top: -4px;
-  left: -4px;
-  right: -4px;
-  bottom: -4px;
-  border-radius: 50%;
-  animation: pulse 2s infinite;
-  border: 1px solid var(--success-color);
-}
-
-@keyframes pulse {
-  0% { transform: scale(1); opacity: 0.5; }
-  70% { transform: scale(1.5); opacity: 0; }
-  100% { transform: scale(1); opacity: 0; }
 }
 
 .status-offline {
@@ -86,9 +65,10 @@
 
 .server-name {
   margin: 0;
-  font-size: 1.125rem;
-  font-weight: 600;
+  font-size: 1rem;
+  font-weight: 700;
   color: var(--text-main);
+  letter-spacing: -0.02em;
 }
 
 .server-hostname {
@@ -124,62 +104,68 @@
   flex: 1;
   display: flex;
   flex-direction: column;
-  gap: 1rem;
+  gap: 0.5rem;
 }
 
-.metrics-grid-main {
+.card-stats-compact {
   display: flex;
-  justify-content: space-around;
-  align-items: center;
-  padding: 0.5rem 0;
+  flex-direction: column;
+  gap: 0.28rem;
+  padding: 0.45rem 0.55rem;
+  background: rgba(255, 255, 255, 0.35);
+  border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.5);
+  font-size: 0.78rem;
 }
 
-.circular-progress-small {
+.stat-line {
   display: flex;
-  align-items: center;
-  justify-content: center;
+  justify-content: space-between;
+  align-items: baseline;
+  gap: 0.75rem;
 }
 
-.circular-progress-small .progress-ring-bg {
-  fill: none;
-  stroke: #e2e8f0;
-  stroke-width: 6;
+.stat-k {
+  color: var(--text-secondary);
+  font-weight: 500;
+  flex-shrink: 0;
 }
 
-.circular-progress-small .progress-ring-circle {
-  fill: none;
-  stroke-width: 6;
-  stroke-linecap: round;
-  transition: stroke-dashoffset 0.5s ease;
-  transform: rotate(-90deg);
-  transform-origin: center;
-}
-
-.circular-progress-small .progress-value-small {
-  font-size: 14px;
+.stat-v {
+  color: var(--text-main);
   font-weight: 600;
-  fill: var(--text-main);
+  font-variant-numeric: tabular-nums;
+  text-align: right;
+  word-break: break-word;
 }
 
-.circular-progress-small .progress-label-small {
-  font-size: 10px;
-  fill: var(--text-secondary);
+.lat-good {
+  color: var(--success-color);
+}
+
+.lat-mid {
+  color: #fde047;
+}
+
+.lat-bad {
+  color: #f87171;
 }
 
 /* Info Grid */
 .card-info-grid {
   display: grid;
   grid-template-columns: 1fr 1fr;
-  gap: 0.75rem;
-  padding: 0.75rem;
-  background: var(--bg-color);
+  gap: 0.45rem;
+  padding: 0.45rem 0.5rem;
+  background: rgba(255, 255, 255, 0.35);
   border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.45);
 }
 
 .info-section {
   display: flex;
   flex-direction: column;
-  gap: 0.5rem;
+  gap: 0.3rem;
 }
 
 .info-row {
@@ -215,10 +201,11 @@
 .card-performance-grid {
   display: grid;
   grid-template-columns: 1fr 1fr;
-  gap: 0.75rem;
-  padding: 0.75rem;
-  background: var(--bg-color);
+  gap: 0.45rem;
+  padding: 0.45rem 0.5rem;
+  background: rgba(255, 255, 255, 0.35);
   border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.45);
 }
 
 .performance-section {
@@ -256,9 +243,9 @@
 }
 
 .performance-item-value {
-  color: var(--primary-color);
+  color: #0284c7;
   font-weight: 600;
-  font-family: monospace;
+  font-family: ui-monospace, monospace;
   text-align: right;
 }
 
@@ -267,10 +254,11 @@
   display: flex;
   justify-content: space-between;
   align-items: center;
-  padding: 0.75rem;
-  background: var(--bg-color);
+  padding: 0.45rem 0.55rem;
+  background: rgba(255, 255, 255, 0.35);
   border-radius: var(--radius-md);
-  margin-top: 0.5rem;
+  border: 1px solid rgba(255, 255, 255, 0.45);
+  margin-top: 0.15rem;
 }
 
 .footer-row {
@@ -325,13 +313,13 @@
   width: 100%;
   height: 8px;
   background: var(--bg-color);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   overflow: hidden;
 }
 
 .progress-bar-fill {
   height: 100%;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   transition: width 0.5s ease;
 }
 
@@ -357,31 +345,40 @@
   display: flex;
   align-items: center;
   justify-content: center;
-  background: var(--bg-color);
+  background: rgba(255, 255, 255, 0.3);
   border-radius: var(--radius-md);
-  margin-bottom: 1.5rem;
+  margin-bottom: 0.65rem;
+  padding: 0.65rem;
   color: var(--text-light);
+  border: 1px dashed rgba(255, 255, 255, 0.55);
+}
+
+.offline-state.sync-pending {
+  border: 1px dashed var(--primary-color);
+  color: var(--text-secondary);
 }
 
 .card-footer {
-  margin-top: auto;
+  margin-top: 0.45rem;
 }
 
 .btn-detail {
   width: 100%;
-  background: var(--surface-hover);
-  border: 1px solid var(--border-color);
-  padding: 0.75rem;
+  background: rgba(255, 255, 255, 0.45);
+  border: 1px solid var(--glass-border);
+  padding: 0.5rem 0.65rem;
   border-radius: var(--radius-md);
-  font-size: 0.875rem;
+  font-size: 0.8rem;
   font-weight: 600;
   color: var(--text-secondary);
   cursor: pointer;
   transition: all 0.2s;
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
 }
 
 .btn-detail:hover {
-  background: var(--primary-color);
-  color: white;
-  border-color: var(--primary-color);
+  background: linear-gradient(135deg, rgba(125, 211, 252, 0.85), rgba(196, 181, 253, 0.75));
+  color: #0f172a;
+  border-color: rgba(255, 255, 255, 0.65);
 }
diff --git a/mengyamonitor-frontend/src/components/ServerCard/ServerCard.tsx b/mengyamonitor-frontend/src/components/ServerCard/ServerCard.tsx
index 9d3c27b..c422c57 100644
--- a/mengyamonitor-frontend/src/components/ServerCard/ServerCard.tsx
+++ b/mengyamonitor-frontend/src/components/ServerCard/ServerCard.tsx
@@ -1,79 +1,7 @@
 import type { ServerConfig, ServerMetrics } from '../../types';
-import { formatUptime, formatBytes } from '../../utils/format';
-import { useSortable } from '@dnd-kit/sortable';
-import { CSS } from '@dnd-kit/utilities';
+import { formatUptime, formatBytes, formatPercent, formatLatencyMs } from '../../utils/format';
 import './ServerCard.css';
 
-const CircularProgress = ({ value, label, color, size = 60 }: { value: number; label: string; color: string; size?: number }) => {
-  const radius = size * 0.36;
-  const circumference = 2 * Math.PI * radius;
-  const offset = circumference - (value / 100) * circumference;
-  
-  return (
-    <div className="circular-progress-small">
-      <svg width={size} height={size} viewBox={`0 0 ${size} ${size}`}>
-        <circle
-          className="progress-ring-bg"
-          cx={size / 2}
-          cy={size / 2}
-          r={radius}
-        />
-        <circle
-          className="progress-ring-circle"
-          stroke={color}
-          strokeDasharray={`${circumference} ${circumference}`}
-          strokeDashoffset={offset}
-          cx={size / 2}
-          cy={size / 2}
-          r={radius}
-        />
-        <text x={size / 2} y={size / 2 - 8} className="progress-value-small" textAnchor="middle" dy="7px">
-          {Math.round(value)}%
-        </text>
-        <text x={size / 2} y={size / 2 + 12} className="progress-label-small" textAnchor="middle">
-          {label}
-        </text>
-      </svg>
-    </div>
-  );
-};
-
-const LoadProgress = ({ value, maxValue = 1.0, size = 80 }: { value: number; maxValue?: number; size?: number }) => {
-  const percentage = Math.min((value / maxValue) * 100, 100);
-  const radius = size * 0.36;
-  const circumference = 2 * Math.PI * radius;
-  const offset = circumference - (percentage / 100) * circumference;
-  const color = percentage > 80 ? '#f87171' : percentage > 50 ? '#fde047' : '#86efac';
-  
-  return (
-    <div className="circular-progress-small">
-      <svg width={size} height={size} viewBox={`0 0 ${size} ${size}`}>
-        <circle
-          className="progress-ring-bg"
-          cx={size / 2}
-          cy={size / 2}
-          r={radius}
-        />
-        <circle
-          className="progress-ring-circle"
-          stroke={color}
-          strokeDasharray={`${circumference} ${circumference}`}
-          strokeDashoffset={offset}
-          cx={size / 2}
-          cy={size / 2}
-          r={radius}
-        />
-        <text x={size / 2} y={size / 2 - 8} className="progress-value-small" textAnchor="middle" dy="7px">
-          {value.toFixed(2)}
-        </text>
-        <text x={size / 2} y={size / 2 + 12} className="progress-label-small" textAnchor="middle">
-          负载
-        </text>
-      </svg>
-    </div>
-  );
-};
-
 export interface ServerCardProps {
   server: ServerConfig;
   online: boolean;
@@ -83,7 +11,6 @@ export interface ServerCardProps {
   storageUsage?: number;
   uptime?: number;
   onDetail: (serverId: string) => void;
-  onRemove: (serverId: string) => void;
 }
 
 export const ServerCard = ({
@@ -95,24 +22,7 @@ export const ServerCard = ({
   storageUsage = 0,
   uptime,
   onDetail,
-  onRemove,
 }: ServerCardProps) => {
-  const {
-    attributes,
-    listeners,
-    setNodeRef,
-    transform,
-    transition,
-    isDragging,
-  } = useSortable({ id: server.id });
-
-  const style = {
-    transform: CSS.Transform.toString(transform),
-    transition,
-    opacity: isDragging ? 0.5 : 1,
-  };
-
-  // 从 URL 提取 IP 地址
   const extractIP = (url: string): string => {
     try {
       const urlObj = new URL(url);
@@ -122,11 +32,10 @@ export const ServerCard = ({
     }
   };
 
-  // 获取主 IP 地址（从网络接口）
   const getMainIP = (): string => {
     if (metrics?.network && metrics.network.length > 0) {
-      const mainInterface = metrics.network.find(iface => 
-        iface.ipAddress && iface.ipAddress !== 'N/A' && !iface.ipAddress.startsWith('127.')
+      const mainInterface = metrics.network.find(
+        (iface) => iface.ipAddress && iface.ipAddress !== 'N/A' && !iface.ipAddress.startsWith('127.')
       );
       return mainInterface?.ipAddress || extractIP(server.url);
     }
@@ -144,74 +53,84 @@ export const ServerCard = ({
   const diskWriteSpeed = metrics?.system?.diskWriteSpeed || 0;
   const networkRxSpeed = metrics?.system?.networkRxSpeed || 0;
   const networkTxSpeed = metrics?.system?.networkTxSpeed || 0;
-  const latency = metrics?.latency?.clientToServer || -1;
+  const latency = metrics?.latency?.clientToServer ?? -1;
   const processCount = metrics?.system?.processCount || 0;
   const packageCount = metrics?.system?.packageCount || 0;
+  const loggedInUsers = metrics?.system?.loggedInUsers;
+  const tcpConnections = metrics?.system?.tcpConnections;
+  const swapTotalBytes = metrics?.memory?.swapTotalBytes;
+  const swapType = metrics?.memory?.swapType;
 
-  // 延迟颜色判断
-  const getLatencyColor = (latency: number): string => {
-    if (latency < 0) return '#ef4444'; // 超时/失败 - 红色
-    if (latency < 50) return '#86efac'; // 低延迟 - 绿色
-    if (latency < 200) return '#fde047'; // 中延迟 - 黄色
-    return '#f87171'; // 高延迟 - 红色
-  };
+  const loadRatio = cpuCores > 0 ? (loadAverage / cpuCores) * 100 : 0;
 
-  const latencyColor = getLatencyColor(latency);
+  const latencyClass =
+    !Number.isFinite(latency) || latency < 0
+      ? 'lat-bad'
+      : latency < 50
+        ? 'lat-good'
+        : latency < 200
+          ? 'lat-mid'
+          : 'lat-bad';
 
   return (
-    <div 
-      ref={setNodeRef}
-      style={style}
-      className={`server-card ${online ? 'online' : 'offline'}`}
-    >
-      <div className="card-header" {...attributes} {...listeners}>
+    <div className={`server-card ${online ? 'online' : 'offline'}`}>
+      <div className="card-header">
         <div className="server-info">
           <div className={`status-indicator ${online ? 'status-online' : 'status-offline'}`} />
           <div className="server-name-group">
             <h3 className="server-name">{server.name}</h3>
-            {online && hostname !== 'Unknown' && (
-              <span className="server-hostname">{hostname}</span>
-            )}
+            {online && hostname !== 'Unknown' && <span className="server-hostname">{hostname}</span>}
           </div>
         </div>
-        <button 
-          className="btn-remove" 
-          onPointerDown={(e) => e.stopPropagation()}
-          onClick={(e) => {
-            e.stopPropagation();
-            onRemove(server.id);
-          }} 
-          title="移除服务器"
-        >
-          ×
-        </button>
       </div>
 
-      {online && metrics ? (
+      {!online ? (
+        <div className="offline-state">
+          <p>服务器连接断开</p>
+        </div>
+      ) : !metrics ? (
+        <div className="offline-state sync-pending">
+          <p>正在从中心同步指标…</p>
+        </div>
+      ) : (
         <>
           <div className="card-main-metrics">
-            <div className="metrics-grid-main">
+            <div className="card-stats-compact">
               {loadAverage > 0 && (
-                <LoadProgress value={loadAverage} maxValue={cpuCores} size={80} />
+                <div className="stat-line">
+                  <span className="stat-k">负载</span>
+                  <span className="stat-v">
+                    {loadAverage.toFixed(2)} / {cpuCores} 核（≈ {formatPercent(loadRatio)}）
+                  </span>
+                </div>
+              )}
+              <div className="stat-line">
+                <span className="stat-k">CPU</span>
+                <span className="stat-v">{formatPercent(cpuUsage)}</span>
+              </div>
+              <div className="stat-line">
+                <span className="stat-k">内存</span>
+                <span className="stat-v">{formatPercent(memoryUsage)}</span>
+              </div>
+              <div className="stat-line">
+                <span className="stat-k">存储峰值</span>
+                <span className="stat-v">{formatPercent(storageUsage)}</span>
+              </div>
+              {swapTotalBytes !== undefined && (
+                <div className="stat-line">
+                  <span className="stat-k">Swap</span>
+                  <span className="stat-v">
+                    {formatBytes(swapTotalBytes)}
+                    {swapType ? ` · ${swapType}` : ''}
+                  </span>
+                </div>
+              )}
+              {tcpConnections !== undefined && (
+                <div className="stat-line">
+                  <span className="stat-k">TCP</span>
+                  <span className="stat-v">{tcpConnections}</span>
+                </div>
               )}
-              <CircularProgress 
-                value={cpuUsage} 
-                label="CPU" 
-                color={cpuUsage > 80 ? '#f87171' : '#86efac'} 
-                size={80}
-              />
-              <CircularProgress 
-                value={memoryUsage} 
-                label="内存" 
-                color={memoryUsage > 80 ? '#fde047' : '#6ee7b7'} 
-                size={80}
-              />
-              <CircularProgress 
-                value={storageUsage} 
-                label="存储" 
-                color={storageUsage > 90 ? '#f87171' : '#a7f3d0'} 
-                size={80}
-              />
             </div>
 
             <div className="card-info-grid">
@@ -239,6 +158,12 @@ export const ServerCard = ({
                   <span className="info-label">进程</span>
                   <span className="info-value">{processCount}</span>
                 </div>
+                {loggedInUsers !== undefined && (
+                  <div className="info-row">
+                    <span className="info-label">会话</span>
+                    <span className="info-value">{loggedInUsers}</span>
+                  </div>
+                )}
                 <div className="info-row">
                   <span className="info-label">软件包</span>
                   <span className="info-value">{packageCount}</span>
@@ -254,11 +179,15 @@ export const ServerCard = ({
                 <div className="performance-row">
                   <span className="performance-item">
                     <span className="performance-item-label">读取</span>
-                    <span className="performance-item-value">{diskReadSpeed > 0 ? formatBytes(diskReadSpeed * 1024 * 1024) + '/s' : '0 B/s'}</span>
+                    <span className="performance-item-value">
+                      {diskReadSpeed > 0 ? formatBytes(diskReadSpeed * 1024 * 1024) + '/s' : '0 B/s'}
+                    </span>
                   </span>
                   <span className="performance-item">
                     <span className="performance-item-label">写入</span>
-                    <span className="performance-item-value">{diskWriteSpeed > 0 ? formatBytes(diskWriteSpeed * 1024 * 1024) + '/s' : '0 B/s'}</span>
+                    <span className="performance-item-value">
+                      {diskWriteSpeed > 0 ? formatBytes(diskWriteSpeed * 1024 * 1024) + '/s' : '0 B/s'}
+                    </span>
                   </span>
                 </div>
               </div>
@@ -270,11 +199,15 @@ export const ServerCard = ({
                 <div className="performance-row">
                   <span className="performance-item">
                     <span className="performance-item-label">下载</span>
-                    <span className="performance-item-value">{networkRxSpeed > 0 ? formatBytes(networkRxSpeed * 1024 * 1024) + '/s' : '0 B/s'}</span>
+                    <span className="performance-item-value">
+                      {networkRxSpeed > 0 ? formatBytes(networkRxSpeed * 1024 * 1024) + '/s' : '0 B/s'}
+                    </span>
                   </span>
                   <span className="performance-item">
                     <span className="performance-item-label">上传</span>
-                    <span className="performance-item-value">{networkTxSpeed > 0 ? formatBytes(networkTxSpeed * 1024 * 1024) + '/s' : '0 B/s'}</span>
+                    <span className="performance-item-value">
+                      {networkTxSpeed > 0 ? formatBytes(networkTxSpeed * 1024 * 1024) + '/s' : '0 B/s'}
+                    </span>
                   </span>
                 </div>
               </div>
@@ -285,23 +218,17 @@ export const ServerCard = ({
                 <span className="footer-label">运行时间</span>
                 <span className="footer-value">{uptime !== undefined ? formatUptime(uptime) : 'N/A'}</span>
               </div>
-              <div className="footer-row">
-                <span className="footer-label">延迟</span>
-                <span className="footer-value" style={{ color: latencyColor }}>
-                  {latency > 0 ? `${latency} ms` : latency === -1 ? '超时' : 'N/A'}
-                </span>
+              <div className="footer-row" title="采集器到监控中心的 TCP 建连耗时（由采集端上报）">
+                <span className="footer-label">采集器→中心</span>
+                <span className={`footer-value ${latencyClass}`}>{formatLatencyMs(latency)}</span>
               </div>
             </div>
           </div>
         </>
-      ) : (
-        <div className="offline-state">
-          <p>服务器连接断开</p>
-        </div>
       )}
-      
+
       <div className="card-footer">
-        <button className="btn-detail" onClick={() => onDetail(server.id)}>
+        <button type="button" className="btn-detail" onClick={() => onDetail(server.id)}>
           查看详情
         </button>
       </div>
diff --git a/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.css b/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.css
index a26e541..e6b6b1b 100644
--- a/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.css
+++ b/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.css
@@ -4,14 +4,14 @@
   left: 0;
   right: 0;
   bottom: 0;
-  background: rgba(0, 0, 0, 0.75);
-  backdrop-filter: blur(8px);
+  background: rgba(30, 27, 46, 0.38);
+  backdrop-filter: blur(4px);
+  -webkit-backdrop-filter: blur(4px);
   display: flex;
   align-items: center;
   justify-content: center;
   z-index: 1000;
-  padding: 20px;
-  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  padding: 12px;
 }
 
 @keyframes fadeIn {
@@ -25,14 +25,15 @@
 
 .modal-content {
   background: var(--surface-color);
-  border-radius: 24px;
+  backdrop-filter: var(--backdrop-blur);
+  -webkit-backdrop-filter: var(--backdrop-blur);
+  border-radius: var(--radius-glass);
   width: 100%;
-  max-width: 1200px;
-  max-height: 90vh;
+  max-width: 1100px;
+  max-height: 92vh;
   overflow: hidden;
   box-shadow: var(--shadow-lg);
-  border: 1px solid var(--border-color);
-  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
+  border: 1px solid var(--glass-border);
   display: flex;
   flex-direction: column;
 }
@@ -46,32 +47,34 @@
   display: flex;
   justify-content: space-between;
   align-items: center;
-  padding: 24px 32px;
-  border-bottom: 1px solid var(--border-color);
+  padding: 12px 16px;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
   position: sticky;
   top: 0;
-  background: var(--surface-color);
+  background: rgba(255, 255, 255, 0.35);
+  backdrop-filter: blur(10px);
+  -webkit-backdrop-filter: blur(10px);
   z-index: 10;
 }
 
 .modal-header h2 {
   margin: 0;
-  font-size: 20px;
+  font-size: 1.05rem;
   font-weight: 700;
   color: var(--text-main);
-  letter-spacing: -0.2px;
+  letter-spacing: -0.03em;
 }
 
 .btn-close {
-  background: var(--surface-hover);
-  border: 1px solid var(--border-color);
-  font-size: 20px;
+  background: rgba(255, 255, 255, 0.45);
+  border: 1px solid var(--glass-border);
+  font-size: 18px;
   color: var(--text-secondary);
   cursor: pointer;
   padding: 0;
-  width: 36px;
-  height: 36px;
-  border-radius: 10px;
+  width: 32px;
+  height: 32px;
+  border-radius: var(--radius-md);
   display: flex;
   align-items: center;
   justify-content: center;
@@ -85,7 +88,7 @@
 }
 
 .modal-body {
-  padding: 24px;
+  padding: 10px 12px 12px;
   overflow-y: auto;
   flex: 1;
 }
@@ -100,7 +103,7 @@
 
 .modal-body::-webkit-scrollbar-thumb {
   background: rgba(255, 255, 255, 0.15);
-  border-radius: 10px;
+  border-radius: var(--radius-sm);
 }
 
 .modal-body::-webkit-scrollbar-thumb:hover {
@@ -108,169 +111,329 @@
 }
 
 .detail-section {
-  margin-bottom: 14px;
-  background: var(--surface-color);
-  border-radius: 12px;
-  padding: 14px;
-  border: 1px solid var(--border-color);
-  transition: all 0.3s ease;
-}
-
-.detail-section:hover {
-  background: var(--surface-hover);
-  border-color: var(--border-color);
+  margin-bottom: 8px;
+  background: rgba(255, 255, 255, 0.28);
+  border-radius: var(--radius-lg);
+  padding: 10px 11px;
+  border: 1px solid rgba(255, 255, 255, 0.52);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
 }
 
 .detail-section:last-child {
   margin-bottom: 0;
 }
 
-.detail-section h3 {
-  margin: 0 0 12px 0;
-  font-size: 15px;
-  font-weight: 600;
-  color: var(--text-main);
+.detail-category-heading {
+  margin: 0 0 8px 0;
+  font-size: 0.8125rem;
+  font-weight: 700;
+  color: #334155;
+  letter-spacing: -0.02em;
   display: flex;
   align-items: center;
   gap: 8px;
 }
 
-.detail-section h3::before {
+.detail-category-heading::before {
   content: '';
   width: 4px;
-  height: 20px;
-  background: linear-gradient(135deg, #86efac 0%, #a7f3d0 100%);
-  border-radius: 2px;
+  height: 14px;
+  border-radius: var(--radius-sm);
+  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
+  flex-shrink: 0;
+}
+
+.detail-subsection {
+  margin-top: 6px;
+}
+
+.detail-subsection:first-of-type {
+  margin-top: 0;
+}
+
+.detail-subsection + .detail-subsection {
+  margin-top: 10px;
+  padding-top: 8px;
+  border-top: 1px dashed rgba(100, 116, 139, 0.28);
+}
+
+.detail-subheading {
+  margin: 0 0 6px 0;
+  font-size: 0.72rem;
+  font-weight: 700;
+  color: var(--text-secondary);
+  text-transform: none;
+  letter-spacing: 0.04em;
+  padding: 3px 10px;
+  width: fit-content;
+  max-width: 100%;
+  border-radius: var(--radius-lg);
+  background: rgba(255, 255, 255, 0.55);
+  border: 1px solid rgba(196, 181, 253, 0.35);
+}
+
+.detail-subheading--inline {
+  margin-bottom: 4px;
+}
+
+.detail-subheading--minor {
+  font-size: 0.68rem;
+  margin-top: 8px;
+  margin-bottom: 6px;
+  background: rgba(255, 255, 255, 0.4);
+  border-color: rgba(125, 211, 252, 0.35);
 }
 
 .detail-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
-  gap: 12px;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: 6px;
 }
 
-.cpu-section-content .detail-grid,
-.memory-section-content .detail-grid {
-  grid-template-columns: repeat(2, 1fr);
-  width: 100%;
+.detail-grid--cpu {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+
+@media (min-width: 640px) {
+  .detail-grid--cpu {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+}
+
+.detail-item--span-full {
+  grid-column: 1 / -1;
 }
 
 .detail-item {
   display: flex;
-  flex-direction: column;
-  gap: 6px;
-  padding: 12px 14px;
-  background: var(--surface-hover);
-  border-radius: 10px;
-  border: 1px solid var(--border-color);
-  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  flex-direction: row;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 6px 8px;
+  background: rgba(255, 255, 255, 0.42);
+  border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.55);
+  transition: border-color 0.2s ease;
 }
 
 .detail-item:hover {
-  background: var(--bg-color);
-  border-color: var(--border-color);
+  border-color: rgba(125, 211, 252, 0.45);
 }
 
 .item-label {
-  font-size: 12px;
+  font-size: 11px;
   color: var(--text-secondary);
   font-weight: 600;
-  letter-spacing: 0.5px;
+  letter-spacing: 0.02em;
+  flex-shrink: 0;
 }
 
 .item-value {
-  font-size: 15px;
+  font-size: 13px;
   color: var(--text-main);
   font-weight: 700;
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
-  letter-spacing: -0.2px;
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  letter-spacing: -0.02em;
+  text-align: right;
+  word-break: break-word;
 }
 
+.item-value.emphasize,
 .item-value.highlight {
-  background: linear-gradient(135deg, #86efac 0%, #a7f3d0 100%);
-  -webkit-background-clip: text;
-  background-clip: text;
-  -webkit-text-fill-color: transparent;
-  font-size: 20px;
+  color: #0284c7;
+  font-size: 14px;
+  font-weight: 700;
+  -webkit-text-fill-color: unset;
+  background: none;
+}
+
+.item-sub {
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--text-secondary);
+}
+
+.detail-plain {
+  margin: 0;
+}
+
+.per-core-plain {
+  margin-top: 8px;
+  padding-top: 8px;
+  border-top: 1px dashed rgba(100, 116, 139, 0.22);
+}
+
+.per-core-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
+  gap: 6px;
+  margin-top: 6px;
+}
+
+.per-core-chip {
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 4px;
+  padding: 8px 10px;
+  background: rgba(255, 255, 255, 0.42);
+  border: 1px solid rgba(255, 255, 255, 0.55);
+  border-radius: var(--radius-md);
+  transition: border-color 0.2s ease, background 0.2s ease;
+}
+
+.per-core-chip:hover {
+  border-color: rgba(125, 211, 252, 0.45);
+  background: rgba(255, 255, 255, 0.55);
+}
+
+.per-core-name {
+  font-size: 10px;
+  font-weight: 700;
+  color: var(--text-secondary);
+  letter-spacing: 0.04em;
+}
+
+.per-core-pct {
+  font-size: 13px;
+  font-weight: 700;
+  font-variant-numeric: tabular-nums;
+  color: var(--text-main);
+}
+
+.storage-plain-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.storage-plain-row {
+  padding: 6px 8px;
+  background: rgba(255, 255, 255, 0.4);
+  border: 1px solid rgba(255, 255, 255, 0.55);
+  border-radius: var(--radius-md);
+  font-size: 12px;
+}
+
+.storage-plain-head {
+  display: flex;
+  justify-content: space-between;
+  align-items: baseline;
+  margin-bottom: 4px;
+}
+
+.storage-mount {
+  font-weight: 600;
+  color: var(--text-main);
+}
+
+.storage-pct {
+  font-weight: 700;
+  font-variant-numeric: tabular-nums;
+  color: var(--text-main);
+}
+
+.storage-meta {
+  color: var(--text-secondary);
+  font-size: 12px;
+  line-height: 1.4;
 }
 
 /* System Info Styles */
 .system-info-container {
   display: flex;
   flex-direction: column;
-  gap: 14px;
+  gap: 8px;
 }
 
 .system-info-group {
   display: flex;
   flex-direction: column;
-  gap: 8px;
+  gap: 5px;
+}
+
+.latency-section-hint {
+  margin: 0 0 8px 0;
+  font-size: 0.68rem;
+  line-height: 1.45;
+  color: var(--text-secondary);
+  max-width: 72ch;
 }
 
 .info-group-title {
   margin: 0;
-  font-size: 12px;
+  font-size: 0.72rem;
   font-weight: 700;
   color: var(--text-secondary);
-  text-transform: uppercase;
-  letter-spacing: 1px;
-  padding-bottom: 6px;
-  border-bottom: 1px solid var(--border-color);
+  text-transform: none;
+  letter-spacing: 0.04em;
+  padding: 3px 10px;
+  width: fit-content;
+  border-radius: var(--radius-lg);
+  background: rgba(255, 255, 255, 0.55);
+  border: 1px solid rgba(249, 168, 212, 0.35);
 }
 
 .system-info-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-  gap: 8px;
+  gap: 6px;
+}
+
+.system-info-grid--cols-3 {
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+}
+
+.system-info-grid--cols-4 {
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+}
+
+.system-info-grid--cols-4 .system-info-item {
+  min-height: 54px;
+  align-items: center;
+}
+
+.system-info-grid--cols-4 .system-info-content:not(.system-info-content--stack) {
+  align-items: center;
+}
+
+.system-info-grid--cols-4 .system-info-content--stack {
+  align-items: flex-start;
 }
 
 .system-info-item {
   display: flex;
   align-items: flex-start;
-  padding: 10px 12px;
-  background: #ffffff;
-  border-radius: 8px;
-  border: 1px solid var(--border-color);
+  min-height: 0;
+  padding: 6px 8px;
+  background: rgba(255, 255, 255, 0.42);
+  border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.55);
   transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
   position: relative;
   overflow: hidden;
 }
 
-.system-info-item::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 3px;
-  height: 100%;
-  background: linear-gradient(180deg, #86efac 0%, #a7f3d0 100%);
-  opacity: 0;
-  transition: opacity 0.3s ease;
-}
-
 .system-info-item:hover {
-  transform: translateY(-2px);
-  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
-  border-color: rgba(134, 239, 172, 0.3);
+  border-color: var(--border-color);
   background: #ffffff;
 }
 
-.system-info-item:hover::before {
-  opacity: 1;
-}
-
 .system-info-item-full {
   grid-column: 1 / -1;
 }
 
 .system-info-item-highlight {
-  background: #ffffff;
-  border-color: rgba(134, 239, 172, 0.2);
+  border-color: rgba(125, 211, 252, 0.45);
+  background: rgba(255, 255, 255, 0.52);
 }
 
 .system-info-item-highlight:hover {
-  background: #ffffff;
-  border-color: rgba(134, 239, 172, 0.4);
+  border-color: rgba(125, 211, 252, 0.6);
 }
 
 .system-info-item-temperature {
@@ -286,34 +449,57 @@
 .system-info-content {
   flex: 1;
   display: flex;
-  flex-direction: column;
-  gap: 4px;
+  flex-direction: row;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 8px;
   min-width: 0;
   width: 100%;
 }
 
-.system-info-label {
+.system-info-content--stack {
+  flex-direction: column;
+  align-items: stretch;
+  gap: 2px;
+}
+
+.system-info-content--stack .system-info-value {
+  margin-top: 2px;
+  text-align: left;
+}
+
+.system-info-sublabel {
   font-size: 10px;
+  font-weight: 500;
+  color: var(--text-secondary);
+  opacity: 0.92;
+  line-height: 1.25;
+}
+
+.system-info-label {
+  font-size: 11px;
   color: var(--text-secondary);
   font-weight: 600;
-  text-transform: uppercase;
-  letter-spacing: 0.5px;
+  text-transform: none;
+  letter-spacing: 0.02em;
+  flex-shrink: 0;
 }
 
 .system-info-value {
-  font-size: 13px;
+  font-size: 12px;
   color: var(--text-main);
   font-weight: 700;
   word-break: break-word;
   line-height: 1.3;
+  text-align: right;
 }
 
 .system-info-value.highlight {
-  background: linear-gradient(135deg, #86efac 0%, #a7f3d0 100%);
-  -webkit-background-clip: text;
-  background-clip: text;
-  -webkit-text-fill-color: transparent;
-  font-size: 16px;
+  color: #0284c7;
+  font-size: 13px;
+  font-weight: 700;
+  -webkit-text-fill-color: unset;
+  background: none;
 }
 
 .system-info-value-long {
@@ -337,22 +523,27 @@
 }
 
 @media (max-width: 768px) {
-  .system-info-grid {
+  .system-info-grid--cols-3,
+  .system-info-grid--cols-4 {
     grid-template-columns: 1fr;
   }
-  
+
   .system-info-item-full {
     grid-column: 1;
   }
+
+  .detail-grid--cpu {
+    grid-template-columns: 1fr;
+  }
 }
 
 /* GPU Items */
 .gpu-item {
-  margin-bottom: 1.5rem;
-  padding: 1.5rem;
-  background: var(--surface-hover);
-  border-radius: var(--radius-lg);
-  border: 1px solid var(--border-color);
+  margin-bottom: 8px;
+  padding: 8px 10px;
+  background: rgba(255, 255, 255, 0.38);
+  border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.55);
 }
 
 .gpu-item:last-child {
@@ -363,25 +554,25 @@
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 1rem;
+  margin-bottom: 6px;
 }
 
 .gpu-header strong {
   color: var(--text-main);
-  font-size: 1rem;
+  font-size: 0.9rem;
 }
 
 .gpu-status {
   padding: 4px 12px;
-  border-radius: 12px;
+  border-radius: var(--radius-md);
   font-size: 0.75rem;
   font-weight: 600;
   text-transform: uppercase;
 }
 
 .gpu-status.ok {
-  background: rgba(134, 239, 172, 0.1);
-  color: var(--success-color);
+  background: rgba(125, 211, 252, 0.2);
+  color: #0369a1;
 }
 
 .gpu-status.error {
@@ -407,14 +598,14 @@
   flex: 1;
   height: 8px;
   background: var(--bg-color);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   overflow: hidden;
 }
 
 .gpu-bar {
   height: 100%;
   background: linear-gradient(90deg, #a7f3d0, #d1fae5);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   transition: width 0.5s ease;
 }
 
@@ -515,26 +706,6 @@
     grid-template-columns: 1fr;
   }
   
-  .cpu-section-content,
-  .memory-section-content {
-    flex-direction: column;
-    text-align: center;
-  }
-  
-  .cpu-circular-group {
-    flex-direction: column;
-    align-items: center;
-  }
-  
-  .gpu-bar-container {
-    flex-wrap: wrap;
-    gap: 0.5rem;
-  }
-  
-  .gpu-bar-bg {
-    min-width: 100%;
-    order: 3;
-  }
 }
 
 /* Docker Containers Section */
@@ -542,7 +713,7 @@
   margin-top: 1rem;
   padding: 1rem;
   background: #f8f9fa;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
 }
 
 .containers-section h4 {
@@ -563,7 +734,7 @@
   margin-top: 1rem;
   padding: 1rem;
   background: #f8f9fa;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
 }
 
 .docker-images-section h4 {
@@ -575,18 +746,15 @@
 
 /* Docker Containers and Images Names */
 .docker-containers-section {
-  margin-top: 16px;
-  padding: 16px;
-  background: var(--surface-hover);
-  border-radius: 12px;
-  border: 1px solid var(--border-color);
+  margin-top: 6px;
+  padding: 8px 10px;
+  background: rgba(255, 255, 255, 0.35);
+  border-radius: var(--radius-md);
+  border: 1px solid rgba(255, 255, 255, 0.5);
 }
 
 .docker-containers-section h4 {
-  margin: 0 0 12px 0;
-  font-size: 14px;
-  color: var(--text-main);
-  font-weight: 600;
+  margin: 0 0 6px 0;
 }
 
 .docker-names-list {
@@ -598,7 +766,7 @@
 .docker-name-tag {
   display: inline-block;
   padding: 6px 12px;
-  border-radius: 8px;
+  border-radius: var(--radius-md);
   font-size: 12px;
   font-weight: 500;
   font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
@@ -630,16 +798,16 @@
 
 /* System Logs Section */
 .logs-container {
-  background: #0a0c10;
-  color: rgba(255, 255, 255, 0.8);
-  border-radius: 12px;
-  padding: 20px;
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
-  font-size: 13px;
-  max-height: 400px;
+  background: rgba(15, 23, 42, 0.78);
+  color: rgba(248, 250, 252, 0.88);
+  border-radius: var(--radius-md);
+  padding: 10px 12px;
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  max-height: 280px;
   overflow-y: auto;
-  border: 1px solid rgba(255, 255, 255, 0.1);
-  line-height: 1.7;
+  border: 1px solid rgba(255, 255, 255, 0.12);
+  line-height: 1.55;
 }
 
 .logs-container::-webkit-scrollbar {
@@ -648,7 +816,7 @@
 
 .logs-container::-webkit-scrollbar-thumb {
   background: rgba(255, 255, 255, 0.2);
-  border-radius: 10px;
+  border-radius: var(--radius-sm);
 }
 
 .log-line {
@@ -668,114 +836,120 @@
   border-bottom: none;
 }
 
-/* Process List Styles */
-.process-list {
-  display: flex;
-  flex-direction: column;
-  gap: 8px;
-}
-
-.process-item {
-  display: flex;
-  gap: 12px;
-  padding: 12px 14px;
-  background: #ffffff;
-  border-radius: 12px;
-  border: 1px solid var(--border-color);
-  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-  position: relative;
-  overflow: hidden;
-}
-
-.process-item::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 3px;
-  background: linear-gradient(90deg, #86efac 0%, #a7f3d0 50%, #d1fae5 100%);
-  opacity: 0;
-  transition: opacity 0.3s ease;
-}
-
-.process-item:hover {
-  transform: translateY(-2px);
-  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
-  border-color: rgba(134, 239, 172, 0.3);
-  background: #ffffff;
-}
-
-.process-item:hover::before {
-  opacity: 1;
-}
-
-.process-rank {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-width: 32px;
-  height: 32px;
-  background: linear-gradient(135deg, #86efac 0%, #a7f3d0 100%);
-  color: white;
-  font-weight: 700;
-  font-size: 14px;
-  border-radius: 8px;
-  box-shadow: 0 2px 8px rgba(134, 239, 172, 0.3);
-  flex-shrink: 0;
-}
-
-.process-item:nth-child(1) .process-rank {
-  background: linear-gradient(135deg, #fde047 0%, #facc15 100%);
-  box-shadow: 0 4px 12px rgba(253, 224, 71, 0.3);
-}
-
-.process-item:nth-child(2) .process-rank {
-  background: linear-gradient(135deg, #a7f3d0 0%, #86efac 100%);
-  box-shadow: 0 4px 12px rgba(167, 243, 208, 0.3);
-}
-
-.process-item:nth-child(3) .process-rank {
-  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
-  box-shadow: 0 4px 12px rgba(209, 250, 229, 0.3);
-}
-
-.process-content {
-  flex: 1;
-  display: flex;
-  flex-direction: column;
-  gap: 10px;
-}
-
-.process-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-}
-
-.process-name-group {
+/* Process — 每进程一行 */
+.process-compact {
   display: flex;
   flex-direction: column;
   gap: 3px;
+  font-size: 12px;
+  min-width: 0;
 }
 
-.process-name {
-  font-size: 14px;
+.process-compact__head,
+.process-compact__row {
+  display: grid;
+  grid-template-columns:
+    1.75rem
+    minmax(0, 1fr)
+    minmax(3.25rem, 4.25rem)
+    minmax(2.75rem, 3.5rem)
+    minmax(5.5rem, 7.5rem);
+  gap: 6px 10px;
+  align-items: center;
+  padding: 4px 8px;
+  border-radius: var(--radius-sm);
+}
+
+.process-compact__head {
+  font-size: 10px;
   font-weight: 700;
-  color: var(--text-main);
-  letter-spacing: -0.3px;
+  color: var(--text-secondary);
+  letter-spacing: 0.05em;
+  padding-bottom: 6px;
+  margin-bottom: 1px;
+  border-bottom: 1px dashed rgba(100, 116, 139, 0.28);
 }
 
-.process-pid {
+.process-compact__head span:nth-child(1),
+.process-compact__rank {
+  text-align: center;
+}
+
+.process-compact__head span:nth-child(4),
+.process-compact__head span:nth-child(5),
+.process-compact__num {
+  text-align: right;
+}
+
+.process-compact__row {
+  background: rgba(255, 255, 255, 0.38);
+  border: 1px solid rgba(255, 255, 255, 0.5);
+  transition: background 0.15s ease, border-color 0.15s ease;
+}
+
+.process-compact__row:hover {
+  background: rgba(255, 255, 255, 0.52);
+  border-color: rgba(125, 211, 252, 0.42);
+}
+
+.process-compact__rank {
+  font-size: 10px;
+  font-weight: 800;
+  font-variant-numeric: tabular-nums;
+  line-height: 1.25;
+  padding: 3px 0;
+  border-radius: var(--radius-sm);
+  background: linear-gradient(135deg, rgba(125, 211, 252, 0.55), rgba(196, 181, 253, 0.5));
+  color: #0f172a;
+}
+
+.process-compact__row:nth-child(2) .process-compact__rank {
+  background: linear-gradient(135deg, rgba(253, 224, 71, 0.65), rgba(251, 207, 232, 0.55));
+}
+
+.process-compact__row:nth-child(3) .process-compact__rank {
+  background: linear-gradient(135deg, rgba(165, 243, 252, 0.55), rgba(125, 211, 252, 0.5));
+}
+
+.process-compact__row:nth-child(4) .process-compact__rank {
+  background: linear-gradient(135deg, rgba(233, 213, 255, 0.55), rgba(196, 181, 253, 0.5));
+}
+
+.process-compact__name {
   font-size: 11px;
+  font-weight: 600;
+  color: var(--text-main);
+  letter-spacing: -0.02em;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  min-width: 0;
+}
+
+.process-compact__pid {
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  font-weight: 600;
+  font-variant-numeric: tabular-nums;
   color: var(--text-secondary);
+}
+
+.process-compact__num {
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  font-weight: 600;
+  font-variant-numeric: tabular-nums;
+  color: var(--text-main);
+}
+
+.process-compact__mem {
+  white-space: nowrap;
+}
+
+.process-compact__mem-abs {
   font-weight: 500;
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
-  background: var(--surface-hover);
-  padding: 3px 8px;
-  border-radius: 5px;
-  display: inline-block;
-  width: fit-content;
+  font-size: 10px;
+  color: var(--text-secondary);
 }
 
 .process-metrics {
@@ -815,14 +989,14 @@
   width: 100%;
   height: 6px;
   background: var(--surface-hover);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   overflow: hidden;
   position: relative;
 }
 
 .metric-bar {
   height: 100%;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
   position: relative;
   overflow: hidden;
@@ -863,7 +1037,7 @@
   gap: 6px;
   padding: 6px 10px;
   background: var(--surface-hover);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   border: 1px solid var(--border-color);
   font-size: 11px;
   color: var(--text-secondary);
@@ -886,203 +1060,131 @@
   color: var(--text-main);
 }
 
-/* Network Interface Styles */
-.network-list {
+/* Network — 每接口一行 */
+.network-compact {
   display: flex;
   flex-direction: column;
-  gap: 10px;
-}
-
-.network-item {
-  padding: 12px 14px;
-  background: #ffffff;
-  border-radius: 10px;
-  border: 1px solid var(--border-color);
-  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-  position: relative;
-  overflow: hidden;
-}
-
-.network-item::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 3px;
-  background: linear-gradient(90deg, #86efac 0%, #a7f3d0 50%, #d1fae5 100%);
-  opacity: 0;
-  transition: opacity 0.3s ease;
-}
-
-.network-item:hover {
-  transform: translateY(-2px);
-  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
-  border-color: rgba(134, 239, 172, 0.3);
-  background: #ffffff;
-}
-
-.network-item:hover::before {
-  opacity: 1;
-}
-
-.network-header {
-  margin-bottom: 10px;
-  padding-bottom: 10px;
-  border-bottom: 1px solid var(--border-color);
-}
-
-.network-name-group {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-}
-
-.network-icon {
-  font-size: 20px;
-  width: 36px;
-  height: 36px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  background: linear-gradient(135deg, #86efac 0%, #a7f3d0 100%);
-  border-radius: 8px;
-  flex-shrink: 0;
-}
-
-.network-name-info {
-  display: flex;
-  flex-direction: column;
-  gap: 4px;
-  flex: 1;
-}
-
-.network-name {
-  font-size: 15px;
-  font-weight: 700;
-  color: var(--text-main);
-  letter-spacing: -0.3px;
-}
-
-.network-ip {
+  gap: 3px;
   font-size: 12px;
-  font-weight: 500;
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
-  padding: 4px 10px;
-  border-radius: 6px;
-  display: inline-block;
-  width: fit-content;
-  transition: all 0.3s ease;
+  min-width: 0;
 }
 
-.network-ip.has-ip {
-  background: linear-gradient(135deg, rgba(134, 239, 172, 0.1) 0%, rgba(167, 243, 208, 0.1) 100%);
-  color: #86efac;
-  border: 1px solid rgba(134, 239, 172, 0.2);
-}
-
-.network-ip.no-ip {
-  background: var(--surface-hover);
-  color: var(--text-secondary);
-  border: 1px solid var(--border-color);
-}
-
-.network-details {
-  display: flex;
-  flex-direction: column;
-  gap: 10px;
-}
-
-.network-detail-row {
+.network-compact__head,
+.network-compact__row {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-  gap: 10px;
-}
-
-.network-detail-item {
-  display: flex;
-  flex-direction: column;
-  gap: 4px;
-  padding: 10px 12px;
-  background: var(--surface-hover);
-  border-radius: 8px;
-  border: 1px solid var(--border-color);
-}
-
-.network-detail-label {
-  font-size: 11px;
-  color: var(--text-secondary);
-  font-weight: 600;
-  text-transform: uppercase;
-  letter-spacing: 0.5px;
-}
-
-.network-detail-value {
-  font-size: 13px;
-  font-weight: 700;
-  color: var(--text-main);
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
-}
-
-.network-traffic {
-  display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-  gap: 10px;
-}
-
-.traffic-item {
-  padding: 10px 12px;
-  background: var(--surface-hover);
-  border-radius: 8px;
-  border: 1px solid var(--border-color);
-  transition: all 0.3s ease;
-}
-
-.traffic-item:hover {
-  background: var(--bg-color);
-  border-color: var(--border-color);
-}
-
-.traffic-header {
-  display: flex;
+  grid-template-columns:
+    minmax(3.75rem, 6rem)
+    minmax(6.5rem, 1fr)
+    minmax(7rem, 1.2fr)
+    minmax(4.25rem, auto)
+    minmax(4.25rem, auto);
+  gap: 6px 12px;
   align-items: center;
-  justify-content: space-between;
-  gap: 8px;
+  padding: 5px 8px;
+  border-radius: var(--radius-sm);
 }
 
-.traffic-label {
-  font-size: 11px;
+.network-compact__head {
+  font-size: 10px;
+  font-weight: 700;
   color: var(--text-secondary);
-  font-weight: 600;
+  letter-spacing: 0.05em;
+  padding-bottom: 6px;
+  margin-bottom: 1px;
+  border-bottom: 1px dashed rgba(100, 116, 139, 0.28);
 }
 
-.traffic-value {
-  font-size: 13px;
+.network-compact__head span:nth-child(4),
+.network-compact__head span:nth-child(5),
+.network-compact__num {
+  text-align: right;
+}
+
+.network-compact__row {
+  background: rgba(255, 255, 255, 0.38);
+  border: 1px solid rgba(255, 255, 255, 0.5);
+  transition: background 0.15s ease, border-color 0.15s ease;
+}
+
+.network-compact__row:hover {
+  background: rgba(255, 255, 255, 0.52);
+  border-color: rgba(125, 211, 252, 0.42);
+}
+
+.network-compact__iface {
+  font-size: 12px;
   font-weight: 700;
   color: var(--text-main);
-  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
+  letter-spacing: -0.02em;
+  margin: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.network-compact__ip {
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.network-compact__ip--ok {
+  display: inline-block;
+  max-width: 100%;
+  padding: 1px 6px;
+  border-radius: var(--radius-sm);
+  background: rgba(125, 211, 252, 0.2);
+  color: #0369a1;
+  border: 1px solid rgba(125, 211, 252, 0.35);
+}
+
+.network-compact__placeholder {
+  color: var(--text-light);
+  font-size: 11px;
+}
+
+.network-compact__mac {
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  color: var(--text-main);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.network-compact__num {
+  font-family: ui-monospace, 'SF Mono', Consolas, monospace;
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-main);
+  white-space: nowrap;
 }
 
 @media (max-width: 768px) {
   .containers-grid {
     grid-template-columns: 1fr;
   }
-  
-  .process-item {
-    flex-direction: column;
-    gap: 10px;
+
+  .process-compact {
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
   }
-  
-  .process-rank {
-    align-self: flex-start;
+
+  .process-compact__head,
+  .process-compact__row {
+    min-width: 28rem;
   }
-  
-  .process-metrics {
-    gap: 8px;
+
+  .network-compact {
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
   }
-  
-  .network-detail-row,
-  .network-traffic {
-    grid-template-columns: 1fr;
+
+  .network-compact__head,
+  .network-compact__row {
+    min-width: 36rem;
   }
 }
diff --git a/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.tsx b/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.tsx
index e64b971..3496d6b 100644
--- a/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.tsx
+++ b/mengyamonitor-frontend/src/components/ServerDetail/ServerDetail.tsx
@@ -1,6 +1,5 @@
 import type { ServerMetrics } from '../../types';
-import { formatBytes, formatUptime, formatPercent } from '../../utils/format';
-import { CircularProgress } from '../Common/CircularProgress';
+import { formatBytes, formatUptime, formatPercent, formatLatencyMs } from '../../utils/format';
 import './ServerDetail.css';
 
 interface ServerDetailProps {
@@ -20,12 +19,12 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
         
         <div className="modal-body">
           <section className="detail-section">
-            <h3>系统信息</h3>
+            <h3 className="detail-category-heading">系统与环境</h3>
             <div className="system-info-container">
               {/* 系统基本信息 */}
               <div className="system-info-group">
                 <h4 className="info-group-title">基本信息</h4>
-                <div className="system-info-grid">
+                <div className="system-info-grid system-info-grid--cols-3">
                   <div className="system-info-item">
                     <div className="system-info-content">
                       <span className="system-info-label">主机名</span>
@@ -59,7 +58,7 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
               {/* 运行时信息 */}
               <div className="system-info-group">
                 <h4 className="info-group-title">运行时信息</h4>
-                <div className="system-info-grid">
+                <div className="system-info-grid system-info-grid--cols-3">
                   <div className="system-info-item system-info-item-highlight">
                     <div className="system-info-content">
                       <span className="system-info-label">运行时间</span>
@@ -72,6 +71,22 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
                       <span className="system-info-value">{metrics.system.processCount}</span>
                     </div>
                   </div>
+                  {metrics.system.loggedInUsers !== undefined && (
+                    <div className="system-info-item">
+                      <div className="system-info-content">
+                        <span className="system-info-label">登录会话</span>
+                        <span className="system-info-value">{metrics.system.loggedInUsers}</span>
+                      </div>
+                    </div>
+                  )}
+                  {metrics.system.tcpConnections !== undefined && (
+                    <div className="system-info-item">
+                      <div className="system-info-content">
+                        <span className="system-info-label">TCP 连接数</span>
+                        <span className="system-info-value">{metrics.system.tcpConnections}</span>
+                      </div>
+                    </div>
+                  )}
                   {metrics.system.packageCount > 0 && (
                     <div className="system-info-item">
                       <div className="system-info-content">
@@ -86,7 +101,7 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
               {/* 性能指标 */}
               <div className="system-info-group">
                 <h4 className="info-group-title">性能指标</h4>
-                <div className="system-info-grid">
+                <div className="system-info-grid system-info-grid--cols-3">
                   <div className="system-info-item">
                     <div className="system-info-content">
                       <span className="system-info-label">磁盘读取</span>
@@ -129,34 +144,48 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
               {/* 延迟信息 */}
               {metrics.latency && (
                 <div className="system-info-group">
-                  <h4 className="info-group-title">延迟检测</h4>
-                  <div className="system-info-grid">
+                  <h4 className="info-group-title">网络延迟（采集端测量）</h4>
+                  <p className="latency-section-hint">
+                    下列指标均在采集器所在机器上探测：第一项为到监控中心 gRPC 地址的 TCP
+                    建连时间；外网三项为采集端对公网站点的 TCP（:80 / :443）建连耗时，非 ICMP ping。
+                  </p>
+                  <div className="system-info-grid system-info-grid--cols-4">
                     <div className="system-info-item system-info-item-highlight">
-                      <div className="system-info-content">
-                        <span className="system-info-label">客户端到服务器</span>
+                      <div className="system-info-content system-info-content--stack">
+                        <span className="system-info-label">采集器到监控中心</span>
+                        <span className="system-info-sublabel">与 CENTRAL_GRPC 的 TCP 连通</span>
                         <span className="system-info-value highlight">
-                          {metrics.latency.clientToServer >= 0 ? `${metrics.latency.clientToServer} ms` : '超时'}
+                          {formatLatencyMs(metrics.latency.clientToServer)}
                         </span>
                       </div>
                     </div>
                     {metrics.latency.external && (
                       <>
                         <div className="system-info-item">
-                          <div className="system-info-content">
+                          <div className="system-info-content system-info-content--stack">
                             <span className="system-info-label">百度 (baidu.com)</span>
-                            <span className="system-info-value">{metrics.latency.external['baidu.com'] || '超时'}</span>
+                            <span className="system-info-sublabel">采集端 TCP 探测</span>
+                            <span className="system-info-value">
+                              {metrics.latency.external['baidu.com'] || '超时'}
+                            </span>
                           </div>
                         </div>
                         <div className="system-info-item">
-                          <div className="system-info-content">
+                          <div className="system-info-content system-info-content--stack">
                             <span className="system-info-label">谷歌 (google.com)</span>
-                            <span className="system-info-value">{metrics.latency.external['google.com'] || '超时'}</span>
+                            <span className="system-info-sublabel">采集端 TCP 探测</span>
+                            <span className="system-info-value">
+                              {metrics.latency.external['google.com'] || '超时'}
+                            </span>
                           </div>
                         </div>
                         <div className="system-info-item">
-                          <div className="system-info-content">
+                          <div className="system-info-content system-info-content--stack">
                             <span className="system-info-label">GitHub (github.com)</span>
-                            <span className="system-info-value">{metrics.latency.external['github.com'] || '超时'}</span>
+                            <span className="system-info-sublabel">采集端 TCP 探测</span>
+                            <span className="system-info-value">
+                              {metrics.latency.external['github.com'] || '超时'}
+                            </span>
                           </div>
                         </div>
                       </>
@@ -168,152 +197,152 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
           </section>
 
           <section className="detail-section">
-            <h3>CPU</h3>
-            <div className="cpu-section-content">
-              <div className="cpu-circular-group">
-                <div className="cpu-circular">
-                  <CircularProgress
-                    value={metrics.cpu.usagePercent}
-                    label=""
-                    size={140}
-                    color={metrics.cpu.usagePercent > 80 ? '#f87171' : '#86efac'}
-                    subLabel={formatPercent(metrics.cpu.usagePercent)}
-                  />
-                </div>
-                {metrics.cpu.loadAverages && metrics.cpu.loadAverages.length > 0 && metrics.cpu.cores > 0 && (
-                  <div className="cpu-load-circular">
-                    <CircularProgress
-                      value={Math.min((metrics.cpu.loadAverages[0] / metrics.cpu.cores) * 100, 100)}
-                      label="负载"
-                      size={140}
-                      color={metrics.cpu.loadAverages[0] / metrics.cpu.cores > 0.8 ? '#fde047' : '#a7f3d0'}
-                      subLabel={metrics.cpu.loadAverages[0].toFixed(2)}
-                    />
+            <h3 className="detail-category-heading">处理器与内存</h3>
+            <div className="detail-subsection">
+              <h4 className="detail-subheading">处理器</h4>
+              <div className="detail-plain">
+                <div className="detail-grid detail-grid--cpu">
+                  <div className="detail-item detail-item--span-full">
+                    <span className="item-label">型号</span>
+                    <span className="item-value">{metrics.cpu.model}</span>
                   </div>
-                )}
-              </div>
-              <div className="detail-grid">
-                <div className="detail-item">
-                  <span className="item-label">型号</span>
-                  <span className="item-value">{metrics.cpu.model}</span>
-                </div>
-                <div className="detail-item">
-                  <span className="item-label">核心数</span>
-                  <span className="item-value">{metrics.cpu.cores}</span>
-                </div>
-                <div className="detail-item">
-                  <span className="item-label">使用率</span>
-                  <span className="item-value highlight">{formatPercent(metrics.cpu.usagePercent)}</span>
-                </div>
-                {metrics.cpu.temperature && metrics.cpu.temperature > 0 && (
                   <div className="detail-item">
-                    <span className="item-label">温度</span>
-                    <span className="item-value">{metrics.cpu.temperature.toFixed(1)}°C</span>
+                    <span className="item-label">核心数</span>
+                    <span className="item-value">{metrics.cpu.cores}</span>
                   </div>
-                )}
-                {metrics.cpu.loadAverages && metrics.cpu.loadAverages.length > 0 && (
                   <div className="detail-item">
-                    <span className="item-label">负载平均值</span>
-                    <span className="item-value">{metrics.cpu.loadAverages.join(' / ')}</span>
+                    <span className="item-label">使用率</span>
+                    <span className="item-value emphasize">{formatPercent(metrics.cpu.usagePercent)}</span>
                   </div>
-                )}
-              </div>
-            </div>
-            
-            {metrics.cpu.perCoreUsage && metrics.cpu.perCoreUsage.length > 0 && (
-              <div className="per-core-section">
-                <h4>各核心使用率</h4>
-                <div className="core-grid-circular">
-                  {metrics.cpu.perCoreUsage.map((core) => (
-                    <div key={core.core} className="core-item-circular">
-                      <CircularProgress
-                        value={core.percent}
-                        label={`Core ${core.core}`}
-                        size={140}
-                        color={core.percent > 80 ? '#f87171' : '#86efac'}
-                        subLabel={formatPercent(core.percent)}
-                      />
+                  {metrics.cpu.temperature && metrics.cpu.temperature > 0 && (
+                    <div className="detail-item">
+                      <span className="item-label">温度</span>
+                      <span className="item-value">{metrics.cpu.temperature.toFixed(1)}°C</span>
                     </div>
-                  ))}
+                  )}
+                  {metrics.cpu.loadAverages && metrics.cpu.loadAverages.length > 0 && (
+                    <>
+                      <div className="detail-item">
+                        <span className="item-label">负载 (1 / 5 / 15 min)</span>
+                        <span className="item-value">{metrics.cpu.loadAverages.map((l) => l.toFixed(2)).join(' / ')}</span>
+                      </div>
+                      {metrics.cpu.cores > 0 && (
+                        <div className="detail-item">
+                          <span className="item-label">相对核心（1 min 负载）</span>
+                          <span className="item-value">
+                            {formatPercent(Math.min((metrics.cpu.loadAverages[0] / metrics.cpu.cores) * 100, 100))}{' '}
+                            <span className="item-sub">
+                              （{metrics.cpu.loadAverages[0].toFixed(2)} / {metrics.cpu.cores} 核）
+                            </span>
+                          </span>
+                        </div>
+                      )}
+                    </>
+                  )}
                 </div>
               </div>
-            )}
-          </section>
+              {metrics.cpu.perCoreUsage && metrics.cpu.perCoreUsage.length > 0 && (
+                <div className="per-core-plain">
+                  <h4 className="detail-subheading detail-subheading--inline">各核心使用率</h4>
+                  <div className="per-core-grid">
+                    {metrics.cpu.perCoreUsage.map((core) => (
+                      <div key={core.core} className="per-core-chip">
+                        <span className="per-core-name">核心 {core.core}</span>
+                        <span className="per-core-pct">{formatPercent(core.percent)}</span>
+                      </div>
+                    ))}
+                  </div>
+                </div>
+              )}
+            </div>
 
-          <section className="detail-section">
-            <h3>内存</h3>
-            <div className="memory-section-content">
-              <div className="memory-circular">
-                <CircularProgress
-                  value={metrics.memory.usedPercent}
-                  label=""
-                  size={140}
-                  color={metrics.memory.usedPercent > 80 ? '#fde047' : '#6ee7b7'}
-                  subLabel={formatPercent(metrics.memory.usedPercent)}
-                />
-              </div>
-              <div className="detail-grid">
-                <div className="detail-item">
-                  <span className="item-label">总容量</span>
-                  <span className="item-value">{formatBytes(metrics.memory.totalBytes)}</span>
-                </div>
-                <div className="detail-item">
-                  <span className="item-label">已使用</span>
-                  <span className="item-value">{formatBytes(metrics.memory.usedBytes)}</span>
-                </div>
-                <div className="detail-item">
-                  <span className="item-label">可用</span>
-                  <span className="item-value">{formatBytes(metrics.memory.freeBytes)}</span>
-                </div>
-                <div className="detail-item">
-                  <span className="item-label">使用率</span>
-                  <span className="item-value highlight">{formatPercent(metrics.memory.usedPercent)}</span>
+            <div className="detail-subsection">
+              <h4 className="detail-subheading">内存</h4>
+              <div className="detail-plain">
+                <div className="detail-grid">
+                  <div className="detail-item">
+                    <span className="item-label">使用率</span>
+                    <span className="item-value emphasize">{formatPercent(metrics.memory.usedPercent)}</span>
+                  </div>
+                  <div className="detail-item">
+                    <span className="item-label">总容量</span>
+                    <span className="item-value">{formatBytes(metrics.memory.totalBytes)}</span>
+                  </div>
+                  <div className="detail-item">
+                    <span className="item-label">已使用</span>
+                    <span className="item-value">{formatBytes(metrics.memory.usedBytes)}</span>
+                  </div>
+                  <div className="detail-item">
+                    <span className="item-label">可用</span>
+                    <span className="item-value">{formatBytes(metrics.memory.freeBytes)}</span>
+                  </div>
+                  {(metrics.memory.swapTotalBytes !== undefined ||
+                    metrics.memory.swapType !== undefined) && (
+                    <>
+                      <div className="detail-item">
+                        <span className="item-label">Swap 总量</span>
+                        <span className="item-value">
+                          {formatBytes(metrics.memory.swapTotalBytes ?? 0)}
+                        </span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">Swap 已用</span>
+                        <span className="item-value">
+                          {formatBytes(metrics.memory.swapUsedBytes ?? 0)}
+                          {metrics.memory.swapUsedPercent !== undefined && (
+                            <span className="item-sub"> ({formatPercent(metrics.memory.swapUsedPercent)})</span>
+                          )}
+                        </span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">Swap 可用</span>
+                        <span className="item-value">
+                          {formatBytes(metrics.memory.swapFreeBytes ?? 0)}
+                        </span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">Swap 类型</span>
+                        <span className="item-value">{metrics.memory.swapType ?? '—'}</span>
+                      </div>
+                    </>
+                  )}
                 </div>
               </div>
             </div>
           </section>
 
           <section className="detail-section">
-            <h3>存储</h3>
-            <div className="storage-grid-circular">
+            <h3 className="detail-category-heading">存储与磁盘</h3>
+            <ul className="storage-plain-list">
               {metrics.storage.map((disk, index) => (
-                <div key={index} className="storage-item-circular">
-                   <CircularProgress
-                      value={disk.usedPercent}
-                      label={disk.mount}
-                      size={160}
-                      color={disk.usedPercent > 90 ? '#f87171' : '#a7f3d0'}
-                      subLabel={formatPercent(disk.usedPercent)}
-                    />
-                    <div className="storage-details-mini">
-                      <div>总: {formatBytes(disk.totalBytes)}</div>
-                      <div>用: {formatBytes(disk.usedBytes)}</div>
-                    </div>
-                </div>
+                <li key={index} className="storage-plain-row">
+                  <div className="storage-plain-head">
+                    <span className="storage-mount">{disk.mount}</span>
+                    <span className="storage-pct">{formatPercent(disk.usedPercent)}</span>
+                  </div>
+                  <div className="storage-meta">
+                    已用 {formatBytes(disk.usedBytes)} / 共 {formatBytes(disk.totalBytes)} · 可用{' '}
+                    {formatBytes(disk.freeBytes)}
+                  </div>
+                </li>
               ))}
-            </div>
+            </ul>
           </section>
 
           {metrics.gpu && metrics.gpu.length > 0 && metrics.gpu[0].status !== 'not_available' && (
             <section className="detail-section">
-              <h3>GPU</h3>
+              <h3 className="detail-category-heading">图形设备</h3>
               {metrics.gpu.map((gpu, index) => (
                 <div key={index} className="gpu-item">
                   <div className="gpu-header">
                     <strong>{gpu.name}</strong>
                     <span className={`gpu-status ${gpu.status}`}>{gpu.status}</span>
                   </div>
-                  <div className="gpu-bar-container">
-                    <div className="gpu-bar-label">利用率</div>
-                    <div className="gpu-bar-bg">
-                        <div 
-                            className="gpu-bar"
-                            style={{ width: `${gpu.utilizationPercent}%` }}
-                        />
-                    </div>
-                    <div className="gpu-bar-value">{formatPercent(gpu.utilizationPercent)}</div>
-                  </div>
                   <div className="detail-grid">
+                    <div className="detail-item">
+                      <span className="item-label">利用率</span>
+                      <span className="item-value emphasize">{formatPercent(gpu.utilizationPercent)}</span>
+                    </div>
                     <div className="detail-item">
                       <span className="item-label">显存总量</span>
                       <span className="item-value">{gpu.memoryTotalMB} MB</span>
@@ -336,167 +365,150 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
 
           {metrics.network && metrics.network.length > 0 && (
             <section className="detail-section">
-              <h3>网络接口</h3>
-              <div className="network-list">
+              <h3 className="detail-category-heading">网络</h3>
+              <div className="network-compact" role="table" aria-label="网络接口">
+                <div className="network-compact__head" role="row">
+                  <span role="columnheader">接口</span>
+                  <span role="columnheader">IP</span>
+                  <span role="columnheader">MAC</span>
+                  <span role="columnheader">接收</span>
+                  <span role="columnheader">发送</span>
+                </div>
                 {metrics.network.map((iface, index) => (
-                  <div key={index} className="network-item">
-                    <div className="network-header">
-                      <div className="network-name-group">
-                        <div className="network-name-info">
-                          <strong className="network-name">{iface.name}</strong>
-                          {iface.ipAddress && (
-                            <span className="network-ip has-ip">
-                              {iface.ipAddress}
-                            </span>
-                          )}
-                        </div>
-                      </div>
-                    </div>
-                    <div className="network-details">
-                      {(iface.macAddress || iface.ipAddress) && (
-                        <div className="network-detail-row">
-                          {iface.macAddress && (
-                            <div className="network-detail-item">
-                              <span className="network-detail-label">MAC 地址</span>
-                              <span className="network-detail-value">{iface.macAddress}</span>
-                            </div>
-                          )}
-                          {iface.ipAddress && (
-                            <div className="network-detail-item">
-                              <span className="network-detail-label">IP 地址</span>
-                              <span className="network-detail-value">{iface.ipAddress}</span>
-                            </div>
-                          )}
-                        </div>
-                      )}
-                      <div className="network-traffic">
-                        <div className="traffic-item">
-                          <div className="traffic-header">
-                            <span className="traffic-label">接收流量</span>
-                            <span className="traffic-value">{formatBytes(iface.rxBytes)}</span>
-                          </div>
-                        </div>
-                        <div className="traffic-item">
-                          <div className="traffic-header">
-                            <span className="traffic-label">发送流量</span>
-                            <span className="traffic-value">{formatBytes(iface.txBytes)}</span>
-                          </div>
-                        </div>
-                      </div>
-                    </div>
+                  <div key={index} className="network-compact__row" role="row">
+                    <strong className="network-compact__iface" role="cell">
+                      {iface.name}
+                    </strong>
+                    <span
+                      className={
+                        iface.ipAddress && iface.ipAddress !== 'N/A'
+                          ? 'network-compact__ip network-compact__ip--ok'
+                          : 'network-compact__placeholder'
+                      }
+                      role="cell"
+                    >
+                      {iface.ipAddress && iface.ipAddress !== 'N/A' ? iface.ipAddress : '—'}
+                    </span>
+                    <span
+                      className="network-compact__mac"
+                      role="cell"
+                      title={iface.macAddress || undefined}
+                    >
+                      {iface.macAddress || '—'}
+                    </span>
+                    <span className="network-compact__num" role="cell" title="接收流量">
+                      {formatBytes(iface.rxBytes)}
+                    </span>
+                    <span className="network-compact__num" role="cell" title="发送流量">
+                      {formatBytes(iface.txBytes)}
+                    </span>
                   </div>
                 ))}
               </div>
             </section>
           )}
 
-          {metrics.system.topProcesses && metrics.system.topProcesses.length > 0 && (
+          {((metrics.system.topProcesses && metrics.system.topProcesses.length > 0) ||
+            (metrics.system.dockerStats && metrics.system.dockerStats.available)) && (
             <section className="detail-section">
-              <h3>Top 5 进程</h3>
-              <div className="process-list">
-                {metrics.system.topProcesses.map((proc, index) => (
-                  <div key={index} className="process-item">
-                    <div className="process-rank">{index + 1}</div>
-                    <div className="process-content">
-                      <div className="process-header">
-                        <div className="process-name-group">
-                          <strong className="process-name">{proc.name}</strong>
-                          <span className="process-pid">PID: {proc.pid}</span>
-                        </div>
+              <h3 className="detail-category-heading">进程与服务</h3>
+              {metrics.system.topProcesses && metrics.system.topProcesses.length > 0 && (
+                <div className="detail-subsection">
+                  <h4 className="detail-subheading">资源占用较高的进程（前 10）</h4>
+                  <div className="process-compact" role="table" aria-label="进程占用">
+                    <div className="process-compact__head" role="row">
+                      <span role="columnheader">#</span>
+                      <span role="columnheader">进程</span>
+                      <span role="columnheader">PID</span>
+                      <span role="columnheader">CPU</span>
+                      <span role="columnheader">内存</span>
+                    </div>
+                    {metrics.system.topProcesses.map((proc, index) => (
+                      <div key={index} className="process-compact__row" role="row">
+                        <span className="process-compact__rank" role="cell">
+                          {index + 1}
+                        </span>
+                        <span className="process-compact__name" role="cell" title={proc.name}>
+                          {proc.name}
+                        </span>
+                        <span className="process-compact__pid" role="cell">
+                          {proc.pid}
+                        </span>
+                        <span className="process-compact__num" role="cell">
+                          {proc.cpu}%
+                        </span>
+                        <span className="process-compact__num process-compact__mem" role="cell">
+                          {proc.memory}%
+                          <span className="process-compact__mem-abs"> {proc.memoryMB.toFixed(1)} MB</span>
+                        </span>
                       </div>
-                      <div className="process-metrics">
-                        <div className="process-metric-item">
-                          <div className="metric-header">
-                            <span className="metric-label">CPU</span>
-                            <span className="metric-value">{proc.cpu}%</span>
-                          </div>
-                          <div className="metric-bar-container">
-                            <div 
-                              className="metric-bar cpu-bar"
-                              style={{ width: `${Math.min(proc.cpu, 100)}%` }}
-                            />
-                          </div>
-                        </div>
-                        <div className="process-metric-item">
-                          <div className="metric-header">
-                            <span className="metric-label">内存</span>
-                            <span className="metric-value">{proc.memory}% ({proc.memoryMB.toFixed(1)} MB)</span>
-                          </div>
-                          <div className="metric-bar-container">
-                            <div 
-                              className="metric-bar memory-bar"
-                              style={{ width: `${Math.min(proc.memory, 100)}%` }}
-                            />
-                          </div>
-                        </div>
+                    ))}
+                  </div>
+                </div>
+              )}
+
+              {metrics.system.dockerStats && metrics.system.dockerStats.available && (
+                <div className="detail-subsection">
+                  <h4 className="detail-subheading">Docker</h4>
+                  {metrics.system.dockerStats.version && (
+                    <div className="detail-grid">
+                      <div className="detail-item">
+                        <span className="item-label">Docker 版本</span>
+                        <span className="item-value">{metrics.system.dockerStats.version}</span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">运行中的容器</span>
+                        <span className="item-value">{metrics.system.dockerStats.running}</span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">停止的容器</span>
+                        <span className="item-value">{metrics.system.dockerStats.stopped}</span>
+                      </div>
+                      <div className="detail-item">
+                        <span className="item-label">镜像数量</span>
+                        <span className="item-value">{metrics.system.dockerStats.imageCount}</span>
                       </div>
                     </div>
-                  </div>
-                ))}
-              </div>
-            </section>
-          )}
+                  )}
 
-          {metrics.system.dockerStats && metrics.system.dockerStats.available && (
-            <section className="detail-section">
-              <h3>Docker 信息</h3>
-              {metrics.system.dockerStats.version && (
-                <div className="detail-grid">
-                  <div className="detail-item">
-                    <span className="item-label">Docker 版本</span>
-                    <span className="item-value">{metrics.system.dockerStats.version}</span>
-                  </div>
-                  <div className="detail-item">
-                    <span className="item-label">运行中的容器</span>
-                    <span className="item-value">{metrics.system.dockerStats.running}</span>
-                  </div>
-                  <div className="detail-item">
-                    <span className="item-label">停止的容器</span>
-                    <span className="item-value">{metrics.system.dockerStats.stopped}</span>
-                  </div>
-                  <div className="detail-item">
-                    <span className="item-label">镜像数量</span>
-                    <span className="item-value">{metrics.system.dockerStats.imageCount}</span>
-                  </div>
-                </div>
-              )}
-              
-              {metrics.system.dockerStats.runningNames && metrics.system.dockerStats.runningNames.length > 0 && (
-                <div className="docker-containers-section">
-                  <h4>运行中的容器</h4>
-                  <div className="docker-names-list">
-                    {metrics.system.dockerStats.runningNames.map((name, index) => (
-                      <span key={index} className="docker-name-tag running">
-                        {name}
-                      </span>
-                    ))}
-                  </div>
-                </div>
-              )}
-              
-              {metrics.system.dockerStats.stoppedNames && metrics.system.dockerStats.stoppedNames.length > 0 && (
-                <div className="docker-containers-section">
-                  <h4>停止的容器</h4>
-                  <div className="docker-names-list">
-                    {metrics.system.dockerStats.stoppedNames.map((name, index) => (
-                      <span key={index} className="docker-name-tag stopped">
-                        {name}
-                      </span>
-                    ))}
-                  </div>
-                </div>
-              )}
-              
-              {metrics.system.dockerStats.imageNames && metrics.system.dockerStats.imageNames.length > 0 && (
-                <div className="docker-containers-section">
-                  <h4>镜像列表</h4>
-                  <div className="docker-names-list">
-                    {metrics.system.dockerStats.imageNames.map((name, index) => (
-                      <span key={index} className="docker-name-tag image">
-                        {name}
-                      </span>
-                    ))}
-                  </div>
+                  {metrics.system.dockerStats.runningNames && metrics.system.dockerStats.runningNames.length > 0 && (
+                    <div className="docker-containers-section">
+                      <h4 className="detail-subheading detail-subheading--minor">运行中的容器</h4>
+                      <div className="docker-names-list">
+                        {metrics.system.dockerStats.runningNames.map((name, index) => (
+                          <span key={index} className="docker-name-tag running">
+                            {name}
+                          </span>
+                        ))}
+                      </div>
+                    </div>
+                  )}
+
+                  {metrics.system.dockerStats.stoppedNames && metrics.system.dockerStats.stoppedNames.length > 0 && (
+                    <div className="docker-containers-section">
+                      <h4 className="detail-subheading detail-subheading--minor">停止的容器</h4>
+                      <div className="docker-names-list">
+                        {metrics.system.dockerStats.stoppedNames.map((name, index) => (
+                          <span key={index} className="docker-name-tag stopped">
+                            {name}
+                          </span>
+                        ))}
+                      </div>
+                    </div>
+                  )}
+
+                  {metrics.system.dockerStats.imageNames && metrics.system.dockerStats.imageNames.length > 0 && (
+                    <div className="docker-containers-section">
+                      <h4 className="detail-subheading detail-subheading--minor">镜像列表</h4>
+                      <div className="docker-names-list">
+                        {metrics.system.dockerStats.imageNames.map((name, index) => (
+                          <span key={index} className="docker-name-tag image">
+                            {name}
+                          </span>
+                        ))}
+                      </div>
+                    </div>
+                  )}
                 </div>
               )}
             </section>
@@ -504,7 +516,8 @@ export const ServerDetail = ({ metrics, serverName, onClose }: ServerDetailProps
 
           {metrics.system.systemLogs && metrics.system.systemLogs.length > 0 && (
             <section className="detail-section">
-              <h3>系统日志</h3>
+              <h3 className="detail-category-heading">诊断与日志</h3>
+              <h4 className="detail-subheading">系统日志</h4>
               <div className="logs-container">
                 {metrics.system.systemLogs.map((log, index) => (
                   <div key={index} className="log-line">
diff --git a/mengyamonitor-frontend/src/hooks/usePublicServers.ts b/mengyamonitor-frontend/src/hooks/usePublicServers.ts
new file mode 100644
index 0000000..bb2506e
--- /dev/null
+++ b/mengyamonitor-frontend/src/hooks/usePublicServers.ts
@@ -0,0 +1,37 @@
+import { useState, useEffect, useCallback } from 'react';
+import type { ServerConfig } from '../types';
+import { fetchPublicServers } from '../api/central';
+
+export const usePublicServers = (refreshMs: number = 30000) => {
+  const [servers, setServers] = useState<ServerConfig[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const reload = useCallback(async () => {
+    try {
+      setError(null);
+      const list = await fetchPublicServers();
+      setServers(
+        list.map((s) => ({
+          id: s.id,
+          name: s.name,
+          url: s.url.replace(/\/$/, ''),
+          enabled: s.enabled,
+        }))
+      );
+    } catch (e) {
+      setError(e instanceof Error ? e.message : '加载失败');
+      setServers([]);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void reload();
+    const t = setInterval(() => void reload(), refreshMs);
+    return () => clearInterval(t);
+  }, [reload, refreshMs]);
+
+  return { servers, loading, error, reload };
+};
diff --git a/mengyamonitor-frontend/src/hooks/useServerMonitor.ts b/mengyamonitor-frontend/src/hooks/useServerMonitor.ts
index 1105267..f527bc2 100644
--- a/mengyamonitor-frontend/src/hooks/useServerMonitor.ts
+++ b/mengyamonitor-frontend/src/hooks/useServerMonitor.ts
@@ -1,58 +1,107 @@
-import { useState, useEffect, useCallback } from 'react';
-import type { ServerConfig, ServerStatus } from '../types';
-import { fetchServerMetrics } from '../api/monitor';
+import { useState, useEffect } from 'react';
+import type { ServerStatus } from '../types';
+import { centralApiBase } from '../api/central';
 
-export const useServerMonitor = (servers: ServerConfig[], interval: number = 2000) => {
+function monitorWsURL(): string {
+  const base = centralApiBase();
+  if (base.startsWith('http://') || base.startsWith('https://')) {
+    const u = new URL(base);
+    u.protocol = u.protocol === 'https:' ? 'wss:' : 'ws:';
+    u.pathname = (u.pathname.replace(/\/$/, '') + '/api/ws/monitor').replace(/\/+/g, '/');
+    if (!u.pathname.startsWith('/')) u.pathname = '/' + u.pathname;
+    return u.toString();
+  }
+  const proto = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+  const path = `${base.replace(/\/$/, '')}/api/ws/monitor`.replace(/\/+/g, '/');
+  return `${proto}//${window.location.host}${path.startsWith('/') ? path : '/' + path}`;
+}
+
+function detachWebSocket(ws: WebSocket) {
+  ws.onmessage = null;
+  ws.onclose = null;
+  ws.onerror = null;
+  ws.onopen = null;
+}
+
+/** Live metrics from the central WebSocket snapshot (gRPC-backed agents only). */
+export const useServerMonitor = () => {
   const [statuses, setStatuses] = useState<Record<string, ServerStatus>>({});
 
-  const fetchMetrics = useCallback(async (server: ServerConfig) => {
-    if (!server.enabled) {
-      return;
-    }
-
-    try {
-      const metrics = await fetchServerMetrics(server.url);
-      setStatuses(prev => ({
-        ...prev,
-        [server.id]: {
-          serverId: server.id,
-          online: true,
-          metrics,
-          lastUpdate: Date.now(),
-        },
-      }));
-    } catch (error) {
-      setStatuses(prev => ({
-        ...prev,
-        [server.id]: {
-          serverId: server.id,
-          online: false,
-          error: error instanceof Error ? error.message : 'Unknown error',
-          lastUpdate: Date.now(),
-        },
-      }));
-    }
-  }, []);
-
   useEffect(() => {
-    // Initial fetch
-    servers.forEach(server => {
-      if (server.enabled) {
-        fetchMetrics(server);
+    let cancelled = false;
+    let pendingTimer: ReturnType<typeof setTimeout> | undefined;
+    let socket: WebSocket | null = null;
+    const url = monitorWsURL();
+
+    const clearPending = () => {
+      if (pendingTimer !== undefined) {
+        clearTimeout(pendingTimer);
+        pendingTimer = undefined;
       }
-    });
+    };
 
-    // Set up polling
-    const timer = setInterval(() => {
-      servers.forEach(server => {
-        if (server.enabled) {
-          fetchMetrics(server);
+    const scheduleConnect = (delayMs: number) => {
+      clearPending();
+      pendingTimer = window.setTimeout(() => {
+        pendingTimer = undefined;
+        if (!cancelled) openSocket();
+      }, delayMs);
+    };
+
+    const openSocket = () => {
+      if (cancelled) return;
+      clearPending();
+      try {
+        socket = new WebSocket(url);
+      } catch {
+        if (!cancelled) scheduleConnect(2000);
+        return;
+      }
+
+      const ws = socket;
+      ws.onmessage = (ev) => {
+        try {
+          const msg = JSON.parse(ev.data as string) as {
+            type?: string;
+            data?: Record<string, ServerStatus>;
+          };
+          if (msg.type === 'snapshot' && msg.data && typeof msg.data === 'object') {
+            setStatuses((prev) => {
+              const next = { ...prev };
+              for (const [id, st] of Object.entries(msg.data!)) {
+                if (st && typeof st === 'object' && 'serverId' in st) {
+                  next[id] = st as ServerStatus;
+                }
+              }
+              return next;
+            });
+          }
+        } catch {
+          /* ignore bad frame */
         }
-      });
-    }, interval);
+      };
 
-    return () => clearInterval(timer);
-  }, [servers, interval, fetchMetrics]);
+      ws.onclose = () => {
+        socket = null;
+        if (cancelled) return;
+        scheduleConnect(2000);
+      };
+    };
+
+    // 推迟到下个 macrotask，避免 React StrictMode 开发环境下首次 effect 立即卸载时
+    // 在 CONNECTING 阶段 close() 触发浏览器 “closed before connection is established” 噪声。
+    scheduleConnect(0);
+
+    return () => {
+      cancelled = true;
+      clearPending();
+      if (socket) {
+        detachWebSocket(socket);
+        socket.close();
+        socket = null;
+      }
+    };
+  }, []);
 
   return statuses;
 };
diff --git a/mengyamonitor-frontend/src/index.css b/mengyamonitor-frontend/src/index.css
index 7e46452..9a00521 100644
--- a/mengyamonitor-frontend/src/index.css
+++ b/mengyamonitor-frontend/src/index.css
@@ -13,42 +13,49 @@
 }
 
 :root {
-  /* Theme Colors - 淡绿色/淡黄绿色渐变 */
-  --primary-color: #86efac;
-  --primary-hover: #6ee7b7;
-  --secondary-color: #a7f3d0;
+  /* Pastel / glass accents（参考玻璃拟态面板） */
+  --primary-color: #7dd3fc;
+  --primary-hover: #38bdf8;
+  --secondary-color: #c4b5fd;
+  --accent-rose: #f9a8d4;
   --warning-color: #fde047;
   --danger-color: #f87171;
-  --success-color: #86efac;
-  
-  /* Backgrounds - 纯白色 */
-  --bg-color: #ffffff;
-  --surface-color: #ffffff;
-  --surface-hover: #ffffff;
-  
+  --success-color: #6ee7b7;
+
+  /* Glass surfaces（--bg-color 用于表单、凹槽等需可读底色的区域） */
+  --bg-color: rgba(255, 255, 255, 0.72);
+  --surface-color: rgba(255, 255, 255, 0.52);
+  --surface-hover: rgba(255, 255, 255, 0.64);
+  --glass-border: rgba(255, 255, 255, 0.45);
+  --glass-shadow: 0 8px 32px rgba(99, 102, 241, 0.08), 0 2px 12px rgba(15, 23, 42, 0.06);
+  --backdrop-blur: blur(12px);
+
   /* Text */
-  --text-main: #0f172a;
+  --text-main: #1e293b;
   --text-secondary: #64748b;
   --text-light: #94a3b8;
-  
-  /* Borders & Shadows - 灰白色边框 */
-  --border-color: #e2e8f0;
-  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
-  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
-  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
-  
-  /* Radius */
-  --radius-sm: 0.375rem;
-  --radius-md: 0.5rem;
-  --radius-lg: 1rem;
-  
-  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+
+  --border-color: rgba(255, 255, 255, 0.55);
+  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
+  --shadow-md: var(--glass-shadow);
+  --shadow-lg: 0 16px 48px rgba(99, 102, 241, 0.12), 0 4px 16px rgba(15, 23, 42, 0.08);
+
+  --radius-sm: 0.25rem;
+  --radius-md: 0.375rem;
+  --radius-lg: 0.5rem;
+  --radius-glass: 0.625rem;
+
+  --font-ui:
+    system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
+
+  font-family: var(--font-ui);
+  font-size: 100%;
   line-height: 1.5;
   font-weight: 400;
 
   color-scheme: light;
   color: var(--text-main);
-  background-color: var(--bg-color);
+  background-color: transparent;
 
   font-synthesis: none;
   text-rendering: optimizeLegibility;
@@ -60,7 +67,13 @@ body {
   margin: 0;
   min-width: 320px;
   min-height: 100vh;
-  background-color: var(--bg-color);
+  background-color: rgba(250, 245, 255, 0.4);
+}
+
+#root {
+  position: relative;
+  z-index: 1;
+  min-height: 100vh;
 }
 
 h1, h2, h3, h4, h5, h6 {
diff --git a/mengyamonitor-frontend/src/types/index.ts b/mengyamonitor-frontend/src/types/index.ts
index 1bd6af4..3c1e2f7 100644
--- a/mengyamonitor-frontend/src/types/index.ts
+++ b/mengyamonitor-frontend/src/types/index.ts
@@ -24,6 +24,13 @@ export interface MemoryMetrics {
   usedBytes: number;
   freeBytes: number;
   usedPercent: number;
+  /** 交换分区 / swap 总量（字节），由新版采集端上报 */
+  swapTotalBytes?: number;
+  swapUsedBytes?: number;
+  swapFreeBytes?: number;
+  swapUsedPercent?: number;
+  /** file / partition / zram 等，来自 /proc/swaps；「无」表示未配置 swap */
+  swapType?: string;
 }
 
 export interface StorageMetrics {
@@ -55,6 +62,10 @@ export interface NetworkInterface {
 
 export interface SystemStats {
   processCount: number;
+  /** 当前登录会话数（who 行数）；新版采集端上报 */
+  loggedInUsers?: number;
+  /** TCP 套接字数（/proc/net/tcp + tcp6，含监听与各状态）；新版采集端上报 */
+  tcpConnections?: number;
   packageCount: number;
   packageManager: string;
   temperature?: number;
diff --git a/mengyamonitor-frontend/src/utils/format.ts b/mengyamonitor-frontend/src/utils/format.ts
index 1817dca..5fe1796 100644
--- a/mengyamonitor-frontend/src/utils/format.ts
+++ b/mengyamonitor-frontend/src/utils/format.ts
@@ -43,3 +43,10 @@ export const formatUptime = (seconds: number): string => {
 export const formatPercent = (value: number): string => {
   return `${Math.round(value * 10) / 10}%`;
 };
+
+/** 采集端上报的毫秒延迟（与 Go 侧 TCP 探测展示一致） */
+export const formatLatencyMs = (ms: number): string => {
+  if (!Number.isFinite(ms) || ms < 0) return '超时';
+  if (ms < 1) return `${ms.toFixed(1)} ms`;
+  return `${Math.round(ms)} ms`;
+};
diff --git a/mengyamonitor-frontend/vite.config.ts b/mengyamonitor-frontend/vite.config.ts
index b59b8f6..9f798a4 100644
--- a/mengyamonitor-frontend/vite.config.ts
+++ b/mengyamonitor-frontend/vite.config.ts
@@ -8,7 +8,7 @@ export default defineConfig({
     react(),
     VitePWA({
       registerType: 'autoUpdate',
-      includeAssets: ['logo.svg'],
+      includeAssets: ['logo.png', 'logo2.png', 'favicon.ico'],
       manifest: {
         name: '萌芽监控面板',
         short_name: '萌芽监控',
@@ -20,12 +20,15 @@ export default defineConfig({
         scope: '/',
         start_url: '/',
         icons: [
-          { src: '/logo.svg', sizes: 'any', type: 'image/svg+xml', purpose: 'any maskable' }
+          { src: '/logo.png', sizes: '512x512', type: 'image/png', purpose: 'any' },
+          { src: '/logo2.png', sizes: '512x512', type: 'image/png', purpose: 'any maskable' },
         ],
         categories: ['utilities', 'productivity']
       },
       workbox: {
         globPatterns: ['**/*.{js,css,html,ico,svg,woff2}'],
+        // 避免开发/生产 SPA 回退误吞 /central-api 转发
+        navigateFallbackDenylist: [/^\/central-api(?:\/|$)/],
         runtimeCaching: [
           {
             urlPattern: /^https:\/\/.*\/api\//i,
@@ -47,5 +50,13 @@ export default defineConfig({
   server: {
     port: 2929,
     host: true,
+    proxy: {
+      '/central-api': {
+        target: 'http://127.0.0.1:9393',
+        changeOrigin: true,
+        ws: true,
+        rewrite: (path) => path.replace(/^\/central-api/, ''),
+      },
+    },
   },
 })
diff --git a/start-backend.bat b/start-backend.bat
index c7d4de8..fa77adf 100644
--- a/start-backend.bat
+++ b/start-backend.bat
@@ -1,6 +1,6 @@
 @echo off
 chcp 65001 >nul
 echo 启动后端服务器...
-cd mengyadriftbottle-backend
+cd mengyamonitor-backend-server
 go mod tidy
 go run main.go
diff --git a/公网部署/grpc.monitor.api.shumengya.top.conf b/公网部署/grpc.monitor.api.shumengya.top.conf
new file mode 100644
index 0000000..70b85ab
--- /dev/null
+++ b/公网部署/grpc.monitor.api.shumengya.top.conf
@@ -0,0 +1,28 @@
+# =============================================================================
+# 萌芽监控 — 采集端 gRPC（TCP 四层透传，与 Gitea SSH 反代同写法）
+# =============================================================================
+# 本文件只能被 nginx 主配置里**顶层**的 stream { } 引入，不可放进取 http { } 的 sites 目录。
+#
+# 在 /etc/nginx/nginx.conf 中与 http { } 平级增加（路径按你实际放置修改）：
+#   stream {
+#       include /etc/nginx/stream-enabled/grpc.monitor.api.shumengya.top.conf;
+#   }
+#
+# 公网监听端口默认 9394（与中心 GRPC_PORT 一致，采集端好记）；若冲突可改为其它端口并放行防火墙。
+# 上游：内网中心宿主机:9394，或 frp/nps 在本机打开的穿透端口（如 127.0.0.1:7001）。
+#
+# 采集端（与当前仓库默认 insecure 明文 gRPC 一致）：
+#   CENTRAL_GRPC=公网VPS_IP:9394
+#   若用域名，须 DNS 指向该 VPS（TCP 无 TLS，安全依赖防火墙 / IP 白名单 / 仅穿透不暴露公网）。
+# =============================================================================
+
+upstream mengyamonitor_grpc_backend {
+    server 10.1.1.233:9394;
+}
+
+server {
+    listen 9394;
+    proxy_pass mengyamonitor_grpc_backend;
+    proxy_timeout 1h;
+    proxy_connect_timeout 10s;
+}
diff --git a/公网部署/mengyamonitor-frontend.conf b/公网部署/mengyamonitor-frontend.conf
new file mode 100644
index 0000000..05e9329
--- /dev/null
+++ b/公网部署/mengyamonitor-frontend.conf
@@ -0,0 +1,75 @@
+# 内网萌芽监控静态站（示例：6767，公网 monitor.shumengya.top 反代到本机）。
+# root 改为你的 Vite 构建产物目录（npm run build 后的 dist 内容）。
+server
+{
+    listen 6767;
+    server_name 192.168.1.100_6767;
+    index index.html index.htm default.htm default.html;
+    root /shumengya/www/self-made/mengyamonitor-frontend;
+    include /www/server/panel/vhost/nginx/extension/192.168.1.100_6767/*.conf;
+    #CERT-APPLY-CHECK--START
+    # 用于SSL证书申请时的文件验证相关配置 -- 请勿删除并保持这段设置在优先级高的位置
+    include /www/server/panel/vhost/nginx/well-known/192.168.1.100_6767.conf;
+    #CERT-APPLY-CHECK--END
+
+    #SSL-START SSL相关配置，请勿删除或修改下一行带注释的404规则
+    #error_page 404/404.html;
+    #SSL-END
+
+    #ERROR-PAGE-START  错误页配置，可以注释、删除或修改
+    #error_page 404 /404.html;
+    #error_page 502 /502.html;
+    #ERROR-PAGE-END
+
+    #REWRITE-START URL重写规则引用,修改后将导致面板设置的伪静态规则失效
+    include /www/server/panel/vhost/rewrite/html_192.168.1.100_6767.conf;
+    #REWRITE-END
+
+    # SPA：浏览器刷新 / 深度链接须回到 index.html；勿删，否则前端路由 404
+    location = /index.html {
+        add_header Cache-Control "no-cache";
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 禁止访问的敏感文件
+    location ~* (\.user.ini|\.htaccess|\.htpasswd|\.env.*|\.project|\.bashrc|\.bash_profile|\.bash_logout|\.DS_Store|\.gitignore|\.gitattributes|LICENSE|README\.md|CLAUDE\.md|CHANGELOG\.md|CHANGELOG|CONTRIBUTING\.md|TODO\.md|FAQ\.md|composer\.json|composer\.lock|package(-lock)?\.json|yarn\.lock|pnpm-lock\.yaml|\.\w+~|\.swp|\.swo|\.bak(up)?|\.old|\.tmp|\.temp|\.log|\.sql(\.gz)?|docker-compose\.yml|docker\.env|Dockerfile|\.csproj|\.sln|Cargo\.toml|Cargo\.lock|go\.mod|go\.sum|phpunit\.xml|phpunit\.xml|pom\.xml|build\.gradl|pyproject\.toml|requirements\.txt|application(-\w+)?\.(ya?ml|properties))$
+    {
+        return 404;
+    }
+
+    # 禁止访问的敏感目录
+    location ~* /(\.git|\.svn|\.bzr|\.vscode|\.claude|\.idea|\.ssh|\.github|\.npm|\.yarn|\.pnpm|\.cache|\.husky|\.turbo|\.next|\.nuxt|node_modules|runtime)/ {
+        return 404;
+    }
+
+    #一键申请SSL证书验证目录相关设置
+    location ~ \.well-known{
+        allow all;
+    }
+
+    #禁止在证书验证目录放入敏感文件
+    if ( $uri ~ "^/\.well-known/.*\.(php|jsp|py|js|css|lua|ts|go|zip|tar\.gz|rar|7z|sql|bak)$" ) {
+        return 403;
+    }
+
+    location ~ .*\\.(gif|jpg|jpeg|png|bmp|swf)$
+    {
+        expires      30d;
+        error_log /dev/null;
+        access_log /dev/null;
+    }
+
+    # 带 hash 的前端资源（Vite /assets）；短缓存，发版靠文件名变化
+    location ~* \.(js|mjs|css|woff2?|svg|ico)$
+    {
+        expires      12h;
+        add_header Cache-Control "public";
+        error_log /dev/null;
+        access_log /dev/null;
+    }
+    access_log  /www/wwwlogs/192.168.1.100_6767.log;
+    error_log  /www/wwwlogs/192.168.1.100_6767.error.log;
+}
\ No newline at end of file
diff --git a/公网部署/monitor.api.shumengya.top.conf b/公网部署/monitor.api.shumengya.top.conf
new file mode 100644
index 0000000..1c3cda2
--- /dev/null
+++ b/公网部署/monitor.api.shumengya.top.conf
@@ -0,0 +1,47 @@
+# 萌芽监控 — 浏览器 / 前端对接 API（HTTPS）
+# 仅 REST + WebSocket → 9393。采集端 gRPC 为 **stream TCP 透传**，见 grpc.monitor.api.shumengya.top.conf（并入 nginx 顶层 stream{}）。
+# 上游 IP 按实际修改（内网中心或可路由到的穿透内网地址）。
+
+upstream mengyamonitor_http {
+    server 10.1.1.233:9393;
+    keepalive 32;
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name monitor.api.shumengya.top;
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    http2 on;
+    server_name monitor.api.shumengya.top;
+
+    ssl_certificate     /etc/letsencrypt/live/monitor.api.shumengya.top/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/monitor.api.shumengya.top/privkey.pem;
+    include /etc/letsencrypt/options-ssl-nginx.conf;
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+
+    location / {
+        proxy_pass http://mengyamonitor_http;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto https;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_read_timeout 86400s;
+        proxy_send_timeout 86400s;
+    }
+}
diff --git a/公网部署/monitor.shumengya.top.conf b/公网部署/monitor.shumengya.top.conf
new file mode 100644
index 0000000..c33e7a6
--- /dev/null
+++ b/公网部署/monitor.shumengya.top.conf
@@ -0,0 +1,42 @@
+# 萌芽监控 — 前端 monitor.shumengya.top（HTTPS）
+# 内网静态源：按需修改 proxy_pass
+
+upstream mengyamonitor_frontend_upstream {
+    server 10.1.1.100:6767;
+    keepalive 16;
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name monitor.shumengya.top;
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    http2 on;
+    server_name monitor.shumengya.top;
+
+    ssl_certificate     /etc/letsencrypt/live/monitor.shumengya.top/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/monitor.shumengya.top/privkey.pem;
+    include /etc/letsencrypt/options-ssl-nginx.conf;
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+
+    location / {
+        proxy_pass http://mengyamonitor_frontend_upstream;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto https;
+    }
+}
diff --git a/需求.txt b/需求.txt
deleted file mode 100644
index 4067185..0000000
--- a/需求.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-1.实现一个服务器监控面板，目前初步支持Linux服务器，监控服务器基本信息，比如：cpu/GPU,内存,储存,操作系统等
-2.采用企业级前后端分离架构,前端使用React框架，后端使用golang原版自带的net库
-3.原理十分简单，后端go获取Linux相关硬件信息，并封装成相关后端json API路由，前端每隔1秒或者2秒获取后端信息
-4.对外访问使用默认端口：2929 后端默认端口为9292
-5.由于是监控面板 前端可以一次性对接多个服务器后端卡片式展示相关信息，前端面板可以展示一些基本信息，用户可以点击详情按钮查看更多详细信息
-6.前端项目已经初始化 前后端代码架构必须分类整齐符合标准方便我阅读修改 
-7.注意前端相当于一个只是客户端用于请求可以配置后端服务器，这两个是分开的，前端可以打包部署在用户电脑上比如做成软件app，而后端构建打包后放到各个服务器上
-8.前端页面风格偏白色柔和风
\ No newline at end of file