fix: PWA icon, robust socket.io reconnect, faster real-time sync

src/lib/socket.ts

@@ -3,23 +3,50 @@
 import { io, Socket } from 'socket.io-client'
 
 let socket: Socket | null = null
+let currentRoom: string | null = null
 
 export function getSocket(): Socket {
   if (!socket) {
     socket = io({
       path: '/socket.io',
-      transports: ['polling', 'websocket'],
+      transports: ['websocket', 'polling'],
       upgrade: true,
-      reconnectionAttempts: 10,
-      reconnectionDelay: 2000,
+      reconnection: true,
+      reconnectionAttempts: Infinity,
+      reconnectionDelay: 1000,
+      reconnectionDelayMax: 5000,
       timeout: 10000,
+      forceNew: false,
     })
     socket.on('connect', () => {
       console.log('[Socket.io] Connected:', socket?.id)
+      // Re-join project room after reconnect
+      if (currentRoom) {
+        console.log('[Socket.io] Re-joining room:', currentRoom)
+        socket?.emit('join-project', currentRoom)
+      }
+    })
+    socket.on('disconnect', (reason) => {
+      console.warn('[Socket.io] Disconnected:', reason)
+      if (reason === 'io server disconnect') {
+        // Server disconnected us, need to manually reconnect
+        socket?.connect()
+      }
     })
     socket.on('connect_error', (err) => {
       console.warn('[Socket.io] Connection error:', err.message)
     })
+    socket.io.on('reconnect', (attempt) => {
+      console.log('[Socket.io] Reconnected after', attempt, 'attempts')
+    })
+    socket.io.on('reconnect_attempt', (attempt) => {
+      console.log('[Socket.io] Reconnect attempt', attempt)
+    })
   }
   return socket
 }
+
+/** Track which room the socket should be in (for auto-rejoin on reconnect) */
+export function setSocketRoom(projectId: string | null): void {
+  currentRoom = projectId
+}