feat: initialize voice-mobile React Native app with NativeWind v5

- Created new Expo app with SDK 54+ and Expo Router
- Installed and configured NativeWind v5 for Tailwind styling
- Upgraded voice-assistant to React 19 for consistency
- Kept voice-mobile outside workspace to avoid Metro bundler conflicts
- Disabled React Compiler experimental feature for stability

Setup includes:
- postcss.config.mjs with Tailwind PostCSS plugin
- global.css with Tailwind and NativeWind imports
- metro.config.js with NativeWind wrapper
- lightningcss pinned to 1.30.1 for stability

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

packages/voice-assistant/package.json

@@ -41,15 +41,15 @@
     "@playwright/test": "^1.56.1",
     "@types/express": "^4.17.20",
     "@types/node": "^20.9.0",
-    "@types/react": "^18.2.37",
-    "@types/react-dom": "^18.2.15",
+    "@types/react": "^19.1.0",
+    "@types/react-dom": "^19.1.0",
     "@types/uuid": "^9.0.7",
     "@types/ws": "^8.5.8",
     "@vitejs/plugin-react": "^4.2.0",
     "@vitest/ui": "^3.2.4",
     "concurrently": "^8.2.2",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^19.1.0",
+    "react-dom": "^19.1.0",
     "tsx": "^4.6.0",
     "typescript": "^5.2.2",
     "vite": "^7.1.10",