- Added inou_api.dart with real API calls to /send-code and /verify
- Updated auth_service to use real API
- Added http package
- Changed all text to use Sora font (inou brand font)
- Logo uses Sora w800 'i'
- Logo: extra bold 'i' (w800) in tighter rounded square
- Changed 'Sign in to your inou account' → 'Enter your email to continue'
- Changed 'Welcome' → 'Welcome to inou'
- Changed 'Sign in with Biometrics' → 'Use Biometrics'
- Created AuthService for managing login state
- Created LoginScreen with email/password form
- Auto-prompts to enable biometric after first login
- Integrated login flow into main.dart
- Shows splash screen during initialization
- AuthGate wraps main app for biometric re-auth