perf(chat): 分页客服会话并拆分统计查询

backend/internal/modules/chat/handler_admin.go

@@ -25,6 +25,27 @@ func (h *Handler) AdminList(c *gin.Context) {
 	response.OK(c, result)
 }
 
+func (h *Handler) AdminCounts(c *gin.Context) {
+	adminID, ok := currentAdminID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少管理员上下文")
+		return
+	}
+	principal := Principal{Type: "admin", ID: adminID}
+	result, err := h.service.AdminConversationCounts(
+		c.Request.Context(),
+		principal,
+		c.DefaultQuery("filter", "all"),
+		c.DefaultQuery("stage", "all"),
+		c.Query("keyword"),
+	)
+	if err != nil {
+		writeChatError(c, err)
+		return
+	}
+	response.OK(c, result)
+}
+
 func (h *Handler) AdminDetail(c *gin.Context) {
 	adminID, ok := currentAdminID(c)
 	if !ok {