refactor(app): remove unused page transition tracking

- Remove AppPageTransitioned event
- Remove pageTransitionCount from AppState
- Remove showInterstitialAdStream from AppState
- Update AppState copyWith and props accordingly

Author: fulleni

lib/app/bloc/app_event.dart

@@ -95,8 +95,3 @@ class AppUserFeedDecoratorShown extends AppEvent {
   @override
   List<Object> get props => [userId, feedDecoratorType, isCompleted];
 }
-
-/// Dispatched when a page transition occurs, used for tracking interstitial ad frequency.
-class AppPageTransitioned extends AppEvent {
-  const AppPageTransitioned();
-}

lib/app/bloc/app_state.dart

@@ -41,8 +41,6 @@ class AppState extends Equatable {
     this.locale = const Locale('en'), // Default to English
     this.remoteConfig,
     this.environment,
-    this.pageTransitionCount = 0, // New field for tracking page transitions
-    required this.showInterstitialAdStream, // New stream for interstitial ad signals
   });
 
   /// The index of the currently selected item in the bottom navigation bar.
@@ -79,16 +77,6 @@ class AppState extends Equatable {
   /// The current application environment (e.g., production, development, demo).
   final local_config.AppEnvironment? environment;
 
-  /// Tracks the number of page transitions since the last interstitial ad was shown.
-  /// This count is used to determine when to display an interstitial ad.
-  final int pageTransitionCount;
-
-  /// A stream that emits a signal when an interstitial ad should be shown.
-  ///
-  /// This stream is used by the [AdNavigatorObserver] to trigger the display
-  /// of interstitial ads based on the [AppBloc]'s logic.
-  final Stream<void> showInterstitialAdStream;
-
   /// Creates a copy of the current state with updated values.
   AppState copyWith({
     int? selectedBottomNavigationIndex,
@@ -102,8 +90,6 @@ class AppState extends Equatable {
     Locale? locale,
     RemoteConfig? remoteConfig,
     local_config.AppEnvironment? environment,
-    int? pageTransitionCount, // New parameter for pageTransitionCount
-    Stream<void>? showInterstitialAdStream, // New parameter for the stream
     bool clearFontFamily = false,
     bool clearAppConfig = false,
     bool clearEnvironment = false,
@@ -121,26 +107,21 @@ class AppState extends Equatable {
       locale: locale ?? this.locale,
       remoteConfig: clearAppConfig ? null : remoteConfig ?? this.remoteConfig,
       environment: clearEnvironment ? null : environment ?? this.environment,
-      pageTransitionCount: pageTransitionCount ?? this.pageTransitionCount,
-      showInterstitialAdStream:
-          showInterstitialAdStream ?? this.showInterstitialAdStream,
     );
   }
 
   @override
   List<Object?> get props => [
-    selectedBottomNavigationIndex,
-    themeMode,
-    flexScheme,
-    fontFamily,
-    appTextScaleFactor,
-    status,
-    user,
-    settings,
-    locale,
-    remoteConfig,
-    environment,
-    pageTransitionCount,
-    showInterstitialAdStream, // Include in props
-  ];
+        selectedBottomNavigationIndex,
+        themeMode,
+        flexScheme,
+        fontFamily,
+        appTextScaleFactor,
+        status,
+        user,
+        settings,
+        locale,
+        remoteConfig,
+        environment,
+      ];
 }