Add React/TypeScript web interface with Chakra UI and SignalR integration

Implement web frontend using Vite + React + TypeScript with:
- Chakra UI component library for theming and styling
- SignalR bridge (lunaBridge) for real-time server communication
- Chat components (ChatPanel, ChatInput, ChatMessage)
- Layout components (AppLayout, Sidebar, StatusBar, SystemPanel)
- Custom useChat hook for conversation state management
- Dark/light theme support via ColorModeProvider
- Mock conversation data for development

WebInterface/vite.config.ts

@@ -0,0 +1,22 @@
+import { defineConfig } from 'vite'
+import react, { reactCompilerPreset } from '@vitejs/plugin-react'
+import babel from '@rolldown/plugin-babel'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [
+    react(),
+    babel({ presets: [reactCompilerPreset()] })
+  ],
+  resolve: {
+    tsconfigPaths: true,
+  },
+  server: {
+    proxy: {
+      '/chat': {
+        target: 'http://localhost:5000',
+        ws: true,
+      },
+    },
+  },
+})