Add browser support with Socket.io transport, authentication, performance-optimized IPC, and CI/CD (#925)

events/EventSystem/BrowserEventBus.ts

@@ -0,0 +1,29 @@
+// Browser-specific EventBus implementation using Socket.io
+import io from 'socket.io-client'
+import { SocketIOClientEventBus } from './SocketIOClientEventBus'
+import { Rpc } from './Rpc'
+
+// Get auth from sessionStorage or use empty (will show login dialog)
+const username = typeof sessionStorage !== 'undefined' ? sessionStorage.getItem('mqtt-explorer-username') || '' : ''
+const password = typeof sessionStorage !== 'undefined' ? sessionStorage.getItem('mqtt-explorer-password') || '' : ''
+
+// Connect to the server (same origin in browser mode)
+const socket = io({
+  auth: {
+    username,
+    password,
+  },
+  reconnection: true,
+  reconnectionDelay: 1000,
+  reconnectionDelayMax: 5000,
+  reconnectionAttempts: Infinity,
+  transports: ['websocket', 'polling'],
+})
+
+export const rendererEvents = new SocketIOClientEventBus(socket)
+export const rendererRpc = new Rpc(rendererEvents)
+
+// In browser mode, the backend is on the server
+// For compatibility, export same instances (renderer communicates with server backend via socket)
+export const backendEvents = rendererEvents
+export const backendRpc = rendererRpc