React Native Migration

This repository now includes an Expo-based mobile app in mobile/.

Current State

• Expo TypeScript project scaffolded in mobile/
• Initial screen implemented: room create/join flow
• Reused room hash logic in mobile/src/core/room.ts
• Mirrored runtime constants in mobile/src/public_settings.ts
• Firebase session init added in mobile/src/platform/firebase.ts
• Room screen now includes a Firebase connection action

Simplicity-First Strategy

• Keep web app in src/ as production baseline
• Keep React Native app in mobile/ during migration
• Migrate feature-by-feature without introducing a shared package yet
• Revisit shared package extraction only after multiple duplicated modules exist

Run Mobile App

cd mobile
npm install
npm run start

What Is Migrated So Far

• Room id generation
• Room hash build and parse logic
• Initial app shell and basic state handling
• Firebase app init and anonymous sign-in

Next Steps

1. Port crypto module with React Native-compatible Web Crypto support
2. Add Firebase initialization and anonymous auth for mobile
3. Port friends sync logic from web feature modules
4. Add geolocation tracking with foreground updates first
5. Add background geolocation and platform permission setup