Fix A11y tests (#5104)

* replace NavigationStack with ElementNavigationStack to allow the content to be rendered without a NavigationStack in a11y tests

* fix a11y tests

* update xcodeproject

* swiftformat fix

* use iOS 26.1 for CI

* use a wrapper to solve the issue for a11y tests

* ElementNavigationStack only uses the trick in DEBUG mode, and added a swiftlint rule to prevent the usage of NavigationStack

ElementX/Sources/Screens/SecureBackup/SecureBackupKeyBackupScreen/View/SecureBackupKeyBackupScreen.swift

@@ -90,7 +90,7 @@ struct SecureBackupKeyBackupScreen_Previews: PreviewProvider, TestablePreview {
     static let setupViewModel = viewModel(keyBackupState: .enabled)
     
     static var previews: some View {
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupKeyBackupScreen(context: setupViewModel.context)
         }
         .previewDisplayName("Set up")

ElementX/Sources/Screens/SecureBackup/SecureBackupLogoutConfirmationScreen/View/SecureBackupLogoutConfirmationScreen.swift

@@ -117,31 +117,31 @@ struct SecureBackupLogoutConfirmationScreen_Previews: PreviewProvider, TestableP
     static let offlineViewModel = makeViewModel(mode: .offline)
     
     static var previews: some View {
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupLogoutConfirmationScreen(context: viewModel.context)
         }
         .previewDisplayName("Confirmation")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupLogoutConfirmationScreen(context: waitingViewModel.context)
         }
         .previewDisplayName("Waiting")
         .snapshotPreferences(expect: waitingViewModel.context.observe(\.viewState.mode).map { $0 == .waitingToStart(hasStalled: false) })
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupLogoutConfirmationScreen(context: ongoingViewModel.context)
         }
         .previewDisplayName("Ongoing")
         .snapshotPreferences(expect: ongoingViewModel.context.observe(\.viewState.mode).map { $0 == .backupOngoing(progress: 0.5) })
         
         // Uses the same view model as Waiting but with a different expectation.
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupLogoutConfirmationScreen(context: waitingViewModel.context)
         }
         .previewDisplayName("Stalled")
         .snapshotPreferences(expect: waitingViewModel.context.observe(\.viewState.mode).map { $0 == .waitingToStart(hasStalled: true) })
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupLogoutConfirmationScreen(context: offlineViewModel.context)
         }
         .previewDisplayName("Offline")

ElementX/Sources/Screens/SecureBackup/SecureBackupRecoveryKeyScreen/View/SecureBackupRecoveryKeyScreen.swift

@@ -246,28 +246,28 @@ struct SecureBackupRecoveryKeyScreen_Previews: PreviewProvider, TestablePreview
     static let unknownViewModel = viewModel(recoveryState: .unknown)
     
     static var previews: some View {
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupRecoveryKeyScreen(context: notSetUpViewModel.context)
         }
         .previewDisplayName("Not set up")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupRecoveryKeyScreen(context: generatingViewModel.context)
         }
         .previewDisplayName("Generating")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupRecoveryKeyScreen(context: setupViewModel.context)
         }
         .snapshotPreferences(expect: setupViewModel.context.observe(\.viewState.recoveryKey).map { $0 != nil })
         .previewDisplayName("Set up")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupRecoveryKeyScreen(context: incompleteViewModel.context)
         }
         .previewDisplayName("Incomplete")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupRecoveryKeyScreen(context: unknownViewModel.context)
         }
         .previewDisplayName("Unknown")

ElementX/Sources/Screens/SecureBackup/SecureBackupScreen/View/SecureBackupScreen.swift

@@ -123,25 +123,25 @@ struct SecureBackupScreen_Previews: PreviewProvider, TestablePreview {
     static let recoveryIncompleteViewModel = viewModel(keyBackupState: .enabled, recoveryState: .incomplete)
     
     static var previews: some View {
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupScreen(context: bothSetupViewModel.context)
         }
         .snapshotPreferences(expect: bothSetupViewModel.context.observe(\.viewState.keyBackupState).map { $0 == .enabled })
         .previewDisplayName("Both setup")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupScreen(context: onlyKeyBackupSetUpViewModel.context)
         }
         .snapshotPreferences(expect: onlyKeyBackupSetUpViewModel.context.observe(\.viewState.keyBackupState).map { $0 == .enabled })
         .previewDisplayName("Only key backup setup")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupScreen(context: keyBackupDisabledViewModel.context)
         }
         .snapshotPreferences(expect: keyBackupDisabledViewModel.context.observe(\.viewState.keyBackupState).map { $0 == .unknown })
         .previewDisplayName("Key backup disabled")
         
-        NavigationStack {
+        ElementNavigationStack {
             SecureBackupScreen(context: recoveryIncompleteViewModel.context)
         }
         .snapshotPreferences(expect: recoveryIncompleteViewModel.context.observe(\.viewState.recoveryState).map { $0 == .incomplete })