refactor: 将客服后端重构为宿主可嵌入模块

- 注入数据库、运行时配置、统一响应、文件存储和平台 AI 能力，补充业务读写工具与客户快捷操作契约。

- 移除模块内重复的组织、客户、工单、标签、技能、旧工作流、MCP 和迁移实现，将身份权限与业务主体交由宿主管理。

- 使用 libSQL 重构向量存储，并完善图片消息、访客身份、排队调度、企业微信和支持聊天页面。

- 统一 HTTP、DTO 与 WebSocket 的 snake_case 协议，补齐模块初始化、业务动作和公共载荷等回归测试。

internal/handlers/dashboard/conversation_handler.go

@@ -28,8 +28,8 @@ func ConversationAnyList(ctx *gin.Context) {
 
 	cnd := params.NewPagedSqlCnd(ctx,
 		params.QueryFilter{ParamName: "status"},
-		params.QueryFilter{ParamName: "serviceMode"},
-		params.QueryFilter{ParamName: "currentAssigneeId"},
+		params.QueryFilter{ParamName: "service_mode"},
+		params.QueryFilter{ParamName: "current_assignee_id"},
 	).Desc("last_message_at").Desc("id")
 
 	paging := params.GetPaging(ctx)
@@ -39,19 +39,7 @@ func ConversationAnyList(ctx *gin.Context) {
 		cnd.Where("customer_name LIKE ? OR last_message_summary LIKE ?", keywordLike, keywordLike)
 	}
 
-	// 标签搜索
-	if tagID, _ := params.GetInt64(ctx, "tagId"); tagID > 0 {
-		tagIDs := services.TagService.GetSelfAndDescendantIDs(tagID)
-		if len(tagIDs) == 0 {
-			httpx.WriteJSON(ctx, &web.PageResult{
-				Results: []response.ConversationResponse{},
-				Page:    paging,
-			})
-			return
-		}
-		cnd.Where("id IN (SELECT conversation_id FROM conversation_tag_rels WHERE tag_id IN (?))", tagIDs)
-	}
-	if agentTeamID, _ := params.GetInt64(ctx, "agentTeamId"); agentTeamID > 0 {
+	if agentTeamID, _ := params.GetInt64(ctx, "agent_team_id"); agentTeamID > 0 {
 		userIDs := services.AgentProfileService.GetUserIDsByTeamID(agentTeamID)
 		if len(userIDs) == 0 {
 			httpx.WriteJSON(ctx, &web.PageResult{
@@ -130,9 +118,9 @@ func ConversationAnyMessage_list(ctx *gin.Context) {
 	}
 
 	var (
-		conversationID, _ = params.GetInt64(ctx, "conversationId")
-		senderType, _     = params.Get(ctx, "senderType")
-		messageType, _    = params.Get(ctx, "messageType")
+		conversationID, _ = params.GetInt64(ctx, "conversation_id")
+		senderType, _     = params.Get(ctx, "sender_type")
+		messageType, _    = params.Get(ctx, "message_type")
 		cursor, _         = params.GetInt64(ctx, "cursor")
 		limit, _          = params.GetInt(ctx, "limit")
 	)
@@ -225,24 +213,6 @@ func ConversationPostClose(ctx *gin.Context) {
 	httpx.WriteJSON(ctx, nil)
 }
 
-func ConversationPostLink_customer(ctx *gin.Context) {
-	operator, err := services.AuthService.RequirePermission(ctx, constants.PermissionConversationLinkCustomer)
-	if err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	req := request.LinkConversationCustomerRequest{}
-	if err := params.ReadJSON(ctx, &req); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	if err := services.ConversationService.LinkConversationCustomer(req.ConversationID, req.CustomerID, operator); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	httpx.WriteJSON(ctx, nil)
-}
-
 func ConversationPostSend_message(ctx *gin.Context) {
 	operator, err := services.AuthService.RequirePermission(ctx, constants.PermissionConversationSend)
 	if err != nil {
@@ -309,7 +279,7 @@ func ConversationPostUpload_image(ctx *gin.Context) {
 		return
 	}
 
-	rawConv := strings.TrimSpace(params.FormValue(ctx, "conversationId"))
+	rawConv := strings.TrimSpace(params.FormValue(ctx, "conversation_id"))
 	if rawConv == "" {
 		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0064"))
 		return
@@ -334,7 +304,7 @@ func ConversationPostUpload_image(ctx *gin.Context) {
 		return
 	}
 
-	item, err := services.AssetService.UploadFile(header, "images", operator)
+	item, err := services.AssetService.UploadConversationImageFile(header, "images", conversationID, operator)
 	if err != nil {
 		httpx.WriteJSON(ctx, err)
 		return
@@ -349,7 +319,7 @@ func ConversationPostUpload_attachment(ctx *gin.Context) {
 		return
 	}
 
-	rawConv := strings.TrimSpace(params.FormValue(ctx, "conversationId"))
+	rawConv := strings.TrimSpace(params.FormValue(ctx, "conversation_id"))
 	if rawConv == "" {
 		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0064"))
 		return
@@ -369,47 +339,10 @@ func ConversationPostUpload_attachment(ctx *gin.Context) {
 		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0324"))
 		return
 	}
-	item, err := services.AssetService.UploadFile(header, "attachments", operator)
+	item, err := services.AssetService.UploadConversationFile(header, "attachments", conversationID, operator)
 	if err != nil {
 		httpx.WriteJSON(ctx, err)
 		return
 	}
 	httpx.WriteJSON(ctx, builders.BuildAsset(item))
 }
-
-func ConversationPostAdd_tag(ctx *gin.Context) {
-	operator, err := services.AuthService.RequirePermission(ctx, constants.PermissionConversationTag)
-	if err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-
-	req := request.AddConversationTagRequest{}
-	if err := params.ReadJSON(ctx, &req); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	if err := services.ConversationTagService.AddTag(req, operator); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	httpx.WriteJSON(ctx, nil)
-}
-
-func ConversationPostRemove_tag(ctx *gin.Context) {
-	if _, err := services.AuthService.RequirePermission(ctx, constants.PermissionConversationTag); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-
-	req := request.RemoveConversationTagRequest{}
-	if err := params.ReadJSON(ctx, &req); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	if err := services.ConversationTagService.RemoveTag(req); err != nil {
-		httpx.WriteJSON(ctx, err)
-		return
-	}
-	httpx.WriteJSON(ctx, nil)
-}