(a) liveRegion + error semantics on form error surfaces so TalkBack
announces them when they appear:
- Shared ErrorCard (used by LoginScreen, RegisterScreen,
VerifyEmail/ResetCode, ForgotPassword, ResetPassword)
- OnboardingCreateAccountContent inline error row
- JoinResidenceScreen inline error row
(b) focusRequester + ImeAction.Next on multi-field forms:
- LoginScreen: auto-focus username, Next→password, Done→submit
- RegisterScreen: auto-focus username, Next chain through
email/password/confirm, Done on last
(c) navigateUp() replaces navController.popBackStack() for simple back
actions in App.kt (6 screens) and MainScreen.kt (3 screens), where
the back behavior is purely navigation-controlled.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>