refactor: 重构项目结构，迁移后端至 mengyastore-backend-go，新增 Java 后端、前端功能更新及部署文档

mengyastore-backend-go/internal/handlers/admin_chat.go

@@ -0,0 +1,88 @@
+package handlers
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// GetAllConversations 返回所有用户会话列表。
+func (h *AdminHandler) GetAllConversations(c *gin.Context) {
+	if !h.requireAdmin(c) {
+		return
+	}
+	convs, err := h.chatStore.ListConversations()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": gin.H{"conversations": convs}})
+}
+
+// GetConversation 返回指定账号的全部消息记录。
+func (h *AdminHandler) GetConversation(c *gin.Context) {
+	if !h.requireAdmin(c) {
+		return
+	}
+	accountID := c.Param("account")
+	if accountID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "缺少账号参数"})
+		return
+	}
+	msgs, err := h.chatStore.GetMessages(accountID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": gin.H{"messages": msgs}})
+}
+
+type adminChatPayload struct {
+	Content string `json:"content"`
+}
+
+// AdminReply 向指定用户发送管理员回复。
+func (h *AdminHandler) AdminReply(c *gin.Context) {
+	if !h.requireAdmin(c) {
+		return
+	}
+	accountID := c.Param("account")
+	if accountID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "缺少账号参数"})
+		return
+	}
+	var payload adminChatPayload
+	if err := c.ShouldBindJSON(&payload); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数有误"})
+		return
+	}
+	content := strings.TrimSpace(payload.Content)
+	if content == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "消息不能为空"})
+		return
+	}
+	msg, err := h.chatStore.SendAdminMessage(accountID, content)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": gin.H{"message": msg}})
+}
+
+// ClearConversation 清除与指定用户的全部消息记录。
+func (h *AdminHandler) ClearConversation(c *gin.Context) {
+	if !h.requireAdmin(c) {
+		return
+	}
+	accountID := c.Param("account")
+	if accountID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "缺少账号参数"})
+		return
+	}
+	if err := h.chatStore.ClearConversation(accountID); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"data": gin.H{"ok": true}})
+}