react-native-migration.md

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`3a20a898` 2026-03-17 Pavel Safronov	1	# React Native Migration
	2
	3	This repository now includes an Expo-based mobile app in `mobile/`.
	4
	5	## Current State
	6
	7	- Expo TypeScript project scaffolded in `mobile/`
	8	- Initial screen implemented: room create/join flow
	9	- Reused room hash logic in `mobile/src/core/room.ts`
	10	- Mirrored runtime constants in `mobile/src/public_settings.ts`
	11	- Firebase session init added in `mobile/src/platform/firebase.ts`
	12	- Room screen now includes a Firebase connection action
	13
	14	## Simplicity-First Strategy
	15
	16	- Keep web app in `src/` as production baseline
	17	- Keep React Native app in `mobile/` during migration
	18	- Migrate feature-by-feature without introducing a shared package yet
	19	- Revisit shared package extraction only after multiple duplicated modules exist
	20
	21	## Run Mobile App
	22
	23	```bash
	24	cd mobile
	25	npm install
	26	npm run start
	27	```
	28
	29	## What Is Migrated So Far
	30
	31	- Room id generation
	32	- Room hash build and parse logic
	33	- Initial app shell and basic state handling
	34	- Firebase app init and anonymous sign-in
	35
	36	## Next Steps
	37
	38	1. Port crypto module with React Native-compatible Web Crypto support
	39	2. Add Firebase initialization and anonymous auth for mobile
	40	3. Port friends sync logic from web feature modules
	41	4. Add geolocation tracking with foreground updates first
	42	5. Add background geolocation and platform permission setup