feat: implement user authentication and login modal, refactor backend

web/backend/services/websocket.js

@@ -0,0 +1,39 @@
+import { WebSocketServer } from 'ws';
+
+let wss = null;
+
+// Inicializar WebSocket Server
+export function initWebSocket(server) {
+  wss = new WebSocketServer({ server, path: '/ws' });
+  
+  wss.on('connection', (ws) => {
+    console.log('Cliente WebSocket conectado');
+    
+    ws.on('close', () => {
+      console.log('Cliente WebSocket desconectado');
+    });
+    
+    ws.on('error', (error) => {
+      console.error('Error WebSocket:', error);
+    });
+  });
+  
+  return wss;
+}
+
+// Broadcast a todos los clientes WebSocket
+export function broadcast(data) {
+  if (!wss) return;
+  
+  wss.clients.forEach((client) => {
+    if (client.readyState === 1) { // WebSocket.OPEN
+      client.send(JSON.stringify(data));
+    }
+  });
+}
+
+// Obtener instancia del WebSocket Server
+export function getWebSocketServer() {
+  return wss;
+}
+