refactor: enhance navigation robustness by introducing popSafe and safePushNamedAndRemoveUntil methods and updating their usage.

apps/mobile/packages/features/staff/authentication/lib/src/presentation/pages/phone_verification_page.dart

@@ -17,9 +17,9 @@ import '../widgets/phone_verification_page/phone_input.dart';
 /// This page coordinates the authentication flow by switching between
 /// [PhoneInput] and [OtpVerification] based on the current [AuthState].
 class PhoneVerificationPage extends StatefulWidget {
-
   /// Creates a [PhoneVerificationPage].
   const PhoneVerificationPage({super.key, required this.mode});
+
   /// The authentication mode (login or signup).
   final AuthMode mode;
 
@@ -123,10 +123,10 @@ class _PhoneVerificationPageState extends State<PhoneVerificationPage> {
                   );
                   Future<void>.delayed(const Duration(seconds: 5), () {
                     if (!mounted) return;
-                    Modular.to.navigate('/');
+                    Modular.to.toInitialPage();
                   });
                 } else if (messageKey == 'errors.auth.unauthorized_app') {
-                  Modular.to.pop();
+                  Modular.to.popSafe();
                 }
               }
             },