- RegistrationView / LoginEmailView / OtpView: pushed with no nav bar, so
they showed the oversized iOS 26 system glass back button. Wrapped each
in LCENavigationView with the standard AppBackButtonIcon, matching
LoginView and every other screen. Dropped the now-dead colorScheme dark
branches and forced .preferredColorScheme(.light) (app has no dark
theme).
- ContentView: root .auth <-> .main switched with no transition. Added
.move transitions on both branches and wrapped enterAuthFlow() /
LoginView's back action in withAnimation, so opening auth from Profile's
'Entrar ou Cadastrar' now slides in and back slides out.
- ProfileLoggedOutFlowTests: new test asserting the pushed auth screens
carry the LCENavigationView back button.
