fix(ws): prevent monitor websocket reconnect loop

go-backend/internal/ws/server.go

@@ -292,7 +292,9 @@ func (s *Server) SendCommand(nodeID int64, cmdType string, data interface{}, tim
 	}
 
 	ns.conn.mu.Lock()
+	_ = ns.conn.conn.SetWriteDeadline(time.Now().Add(wsWriteWait))
 	err = ns.conn.conn.WriteMessage(websocket.TextMessage, messageData)
+	_ = ns.conn.conn.SetWriteDeadline(time.Time{})
 	ns.conn.mu.Unlock()
 	if err != nil {
 		cleanup()
@@ -429,7 +431,9 @@ func (s *Server) broadcastToAdmins(message string) {
 
 	for _, c := range admins {
 		c.mu.Lock()
+		_ = c.conn.SetWriteDeadline(time.Now().Add(wsWriteWait))
 		err := c.conn.WriteMessage(websocket.TextMessage, []byte(message))
+		_ = c.conn.SetWriteDeadline(time.Time{})
 		c.mu.Unlock()
 		if err != nil {
 			log.Printf("websocket broadcast failed: %v", err)
@@ -478,6 +482,7 @@ func startKeepalive(cw *connWrap, done <-chan struct{}) {
 			cw.mu.Lock()
 			_ = cw.conn.SetWriteDeadline(time.Now().Add(wsWriteWait))
 			err := cw.conn.WriteMessage(websocket.PingMessage, nil)
+			_ = cw.conn.SetWriteDeadline(time.Time{})
 			cw.mu.Unlock()
 			if err != nil {
 				_ = cw.conn.Close()

vite-frontend/nginx.conf

@@ -87,6 +87,8 @@ http {
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection "upgrade";
+            proxy_read_timeout 3600s;
+            proxy_send_timeout 3600s;
             
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
@@ -94,4 +96,4 @@ http {
             proxy_set_header X-Forwarded-Proto $scheme;
         }
     }
-} 
+}