efe8fe36d4
- Google, Apple, GitHub SSO login via popup OAuth flow - New /mobile/auth page with 3-click registration (Click provider → authorize → auto-logged in) - Email registration with name + email + password - /mobile/setup page with step-by-step OAuth setup guide - OAuth env vars in .env.example, docker-compose.yml - scripts/setup-sso.sh for one-command credential setup - Graceful 503 when OAuth not configured