fix: 修复网络连接时波动导致客户端死锁问题

internal/network/client.go

@@ -118,14 +118,22 @@ func (c *WSClient) closeConn() {
 	c.isConnected = false
 }
 
-func (c *WSClient) connect() any {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
+func (c *WSClient) connect() error {
 	conn, _, err := websocket.DefaultDialer.Dial(c.config.ServerURL, nil)
 	if err != nil {
 		return err
 	}
+
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	select {
+	case <-c.stopChan:
+		conn.Close()
+		return nil
+	default:
+	}
+
 	c.conn = conn
 	c.isConnected = true
 	log.Printf("[网络] 成功连接到服务器: %s", c.config.ServerURL)