Replace websocket flow with SSE support in backend.

Update handlers, services, router, and data conversion logic to support server-sent events and related message pipeline changes.

Made-with: Cursor

internal/router/router.go

@@ -17,7 +17,6 @@ type Router struct {
 	messageHandler       *handler.MessageHandler
 	notificationHandler  *handler.NotificationHandler
 	uploadHandler        *handler.UploadHandler
-	wsHandler            *handler.WebSocketHandler
 	pushHandler          *handler.PushHandler
 	systemMessageHandler *handler.SystemMessageHandler
 	groupHandler         *handler.GroupHandler
@@ -36,7 +35,6 @@ func New(
 	notificationHandler *handler.NotificationHandler,
 	uploadHandler *handler.UploadHandler,
 	jwtService *service.JWTService,
-	wsHandler *handler.WebSocketHandler,
 	pushHandler *handler.PushHandler,
 	systemMessageHandler *handler.SystemMessageHandler,
 	groupHandler *handler.GroupHandler,
@@ -55,7 +53,6 @@ func New(
 		messageHandler:       messageHandler,
 		notificationHandler:  notificationHandler,
 		uploadHandler:        uploadHandler,
-		wsHandler:            wsHandler,
 		pushHandler:          pushHandler,
 		systemMessageHandler: systemMessageHandler,
 		groupHandler:         groupHandler,
@@ -79,11 +76,6 @@ func (r *Router) setupRoutes() {
 		c.JSON(200, gin.H{"status": "ok"})
 	})
 
-	// WebSocket 路由
-	if r.wsHandler != nil {
-		r.engine.GET("/ws", r.wsHandler.HandleWebSocket)
-	}
-
 	// API v1
 	v1 := r.engine.Group("/api/v1")
 	{
@@ -210,10 +202,18 @@ func (r *Router) setupRoutes() {
 			conversations.POST("/set_pinned", r.messageHandler.HandleSetConversationPinned)
 			// 获取未读消息总数
 			conversations.GET("/unread/count", r.messageHandler.GetUnreadCount)
+			// 上报输入状态
+			conversations.POST("/typing", r.messageHandler.HandleTyping)
 			// 仅自己删除会话
 			conversations.DELETE("/:id/self", r.messageHandler.HandleDeleteConversationForSelf)
 		}
 
+		realtime := v1.Group("/realtime")
+		realtime.Use(authMiddleware)
+		{
+			realtime.GET("/sse", r.messageHandler.HandleSSE)
+		}
+
 		// 消息操作路由
 		messages := v1.Group("/messages")
 		messages.Use(authMiddleware)