[auth-payment-login-lockout] Make auth intro a clean screen with a back button

App Review rejected the 2026-08 build: tapping checkout as a guest
switched root to .auth, which replaced the whole UI with LoginView as the
NavigationStack root - no nav bar, no back, no dismiss. User was trapped.

- LoginView: rebuilt as a static screen in LCENavigationView with a back
  button that sets root = .main, a 'Criar conta' and an 'Entrar' button,
  and 'Termos de Uso' / 'Politica de Privacidade' links. Added #Preview.
- Forced .preferredColorScheme(.light) and fixed DS colors (the app has
  no dark theme, so system dark mode was inverting the nav bar / title).
- Removed the entry-reveal animation machinery (heroVisible/textVisible/
  buttonVisible/token/prepare flags across LoginView, AuthFlowView,
  ContentView) - dead since guest browsing shipped and the root cause of
  the 2026-08-06 'content stuck hidden' bug.
- enterAuthFlow() is now just root = .auth.
- UITestSupport.ensureLoggedIn taps 'Entrar' (new label).
- ProfileLoggedOutFlowTests: new test covering the choices and the way
  back out of .auth.
- Localizable.xcstrings: catalog caught up to the new/removed strings.

PediFoods/ContentView.swift

@@ -15,8 +15,6 @@ struct ContentView: View {
     @State var hasPerformedInitialLaunchBootstrap = false
     @State var showLaunchSplash = true
     @State var shouldPulseLaunchSplash = true
-    @State var shouldPrepareAuthEntryAnimation = DefaultTokenStore().jwt == nil
-    @State var authEntryAnimationToken = 0
     @State private var sessionExpiredObserver: NSObjectProtocol?
     @State var cartResetObserver: Any?
     @State var appResumeObserver: Any?
@@ -32,9 +30,7 @@ struct ContentView: View {
                         root: $root,
                         selectedTab: $selectedTab,
                         tokenStore: tokenStore,
-                        appState: $appState,
-                        shouldPrepareLoginEntry: shouldPrepareAuthEntryAnimation,
-                        authEntryAnimationToken: authEntryAnimationToken
+                        appState: $appState
                     )
                 case .main:
                     if isBootstrappingSession {
@@ -136,15 +132,11 @@ struct ContentView: View {
         }
 
         if root == .auth {
-            shouldPrepareAuthEntryAnimation = true
             shouldPulseLaunchSplash = false
             try? await Task.sleep(nanoseconds: 180_000_000)
             withAnimation(.easeInOut(duration: 0.34)) {
                 showLaunchSplash = false
             }
-            try? await Task.sleep(nanoseconds: 360_000_000)
-            authEntryAnimationToken += 1
-            scheduleDisableAuthEntryPreparation()
             return
         }
 
@@ -410,17 +402,13 @@ struct ContentView: View {
         enterAuthFlow()
     }
 
-    /// The only correct way to transition `root` to `.auth`: pairs the
-    /// switch with the token bump `LoginView` needs to run its entry
-    /// reveal animation. A bare `root = .auth` leaves the login screen's
-    /// hero/text/button stuck hidden - see
-    /// decisions/2026-08-06-login-entry-animation-bug.md.
+    /// The single funnel for entering the auth flow. `LoginView` is a
+    /// static screen with its own `LCENavigationView` back button (sets
+    /// `root = .main`), so no animation priming is needed here - see
+    /// decisions/2026-08-27-payment-auth-lockout-clean-intro-screen.md.
     @MainActor
     private func enterAuthFlow() {
-        shouldPrepareAuthEntryAnimation = true
         root = .auth
-        authEntryAnimationToken += 1
-        scheduleDisableAuthEntryPreparation()
     }
 
     @MainActor
@@ -463,13 +451,6 @@ struct ContentView: View {
         )
     }
 
-    private func scheduleDisableAuthEntryPreparation() {
-        Task { @MainActor in
-            try? await Task.sleep(nanoseconds: 900_000_000)
-            shouldPrepareAuthEntryAnimation = false
-        }
-    }
-
     private func hasConfiguredAddress() -> Bool {
         if appState.address.selectedId != nil {
             return true