Initial commit: Modern step-based UI for Rondevu demo

- Step-based flow: Choose action → Choose method → Enter details → Chat
- Modern design with clean header and footer
- GitHub links with icons to client and server repos
- Footer link to ronde.vu
- Three connection methods: Topic, Peer ID, Connection ID
- Real WebRTC peer-to-peer chat
- Mobile-responsive design
- Collapsible activity log

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

vite.config.js

@@ -0,0 +1,14 @@
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    open: true
+  },
+  build: {
+    outDir: 'dist',
+    sourcemap: true
+  }
+});