修复：为 user-svc 添加健康检查和启动顺序控制

backend/gateway/internal/ws/hub.go

@@ -3,57 +3,57 @@ package ws
 import (
 	"log"
 
-	"backend/gateway/internal/service"
+	"gateway/internal/service"
 )
 
 type Hub struct {
 	// 注册的客户端
-	clients map[*Client]bool
+	Clients map[*Client]bool
 
 	// 从客户端接收的消息
-	broadcast chan *Message
+	Broadcast chan *Message
 
 	// 注册请求
-	register chan *Client
+	Register chan *Client
 
 	// 注销请求
-	unregister chan *Client
+	Unregister chan *Client
 
 	// 用户服务
-	userService *service.UserService
+	UserService *service.UserService
 }
 
 func NewHub(userService *service.UserService) *Hub {
 	return &Hub{
-		broadcast:   make(chan *Message),
-		register:    make(chan *Client),
-		unregister:  make(chan *Client),
-		clients:     make(map[*Client]bool),
-		userService: userService,
+		Broadcast:   make(chan *Message),
+		Register:    make(chan *Client),
+		Unregister:  make(chan *Client),
+		Clients:     make(map[*Client]bool),
+		UserService: userService,
 	}
 }
 
 func (h *Hub) Run() {
 	for {
 		select {
-		case client := <-h.register:
-			h.clients[client] = true
-			log.Printf("Client connected. Total clients: %d", len(h.clients))
+		case client := <-h.Register:
+			h.Clients[client] = true
+			log.Printf("Client connected. Total clients: %d", len(h.Clients))
 
-		case client := <-h.unregister:
-			if _, ok := h.clients[client]; ok {
-				delete(h.clients, client)
-				close(client.send)
-				log.Printf("Client disconnected. Total clients: %d", len(h.clients))
+		case client := <-h.Unregister:
+			if _, ok := h.Clients[client]; ok {
+				delete(h.Clients, client)
+				close(client.Send)
+				log.Printf("Client disconnected. Total clients: %d", len(h.Clients))
 			}
 
-		case message := <-h.broadcast:
-			for client := range h.clients {
+		case message := <-h.Broadcast:
+			for client := range h.Clients {
 				select {
-				case client.send <- message:
+				case client.Send <- message:
 				default:
-					close(client.send)
-					delete(h.clients, client)
+					close(client.Send)
+					delete(h.Clients, client)
 				}
 			}
 		}