- Add supabase_flutter dependency
- Replace default counter template with auth flow (AuthGate, LoginScreen, HomeScreen)
- Implement email/password sign-in via signInWithPassword()
- Add forgot password flow with resetPasswordForEmail() and hwcollector://login deep link
- Handle PASSWORD_RECOVERY event to show set-new-password dialog
- Add deep link intent-filter to AndroidManifest for hwcollector://login scheme
- Configure Supabase URL and publishable key
- Replace outdated widget test with placeholder
