feat: update chat, settings, prompts and system info modules

backend/internal/handlers/sysinfo_linux.go

@@ -0,0 +1,53 @@
+//go:build linux
+
+package handlers
+
+import (
+	"bufio"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func getSysMemMb() (total, free int64) {
+	f, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return 0, 0
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "MemTotal:") {
+			total = parseMemInfoKB(line)
+		} else if strings.HasPrefix(line, "MemAvailable:") {
+			free = parseMemInfoKB(line)
+		}
+	}
+	return total / 1024, free / 1024
+}
+
+func parseMemInfoKB(line string) int64 {
+	fields := strings.Fields(line)
+	if len(fields) < 2 {
+		return 0
+	}
+	v, _ := strconv.ParseInt(fields[1], 10, 64)
+	return v
+}
+
+func getOSRelease() string {
+	f, err := os.Open("/etc/os-release")
+	if err != nil {
+		return ""
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "PRETTY_NAME=") {
+			return strings.Trim(strings.TrimPrefix(line, "PRETTY_NAME="), `"`)
+		}
+	}
+	return ""
+}