refactor(entity_details): update ad injection theming approach

- Replace ThemeData with AdThemeStyle in EntityDetailsLoadRequested event
- Update props to include adThemeStyle
- Improve code clarity and maintainability for ad theming

Author: fulleni

lib/entity_details/bloc/entity_details_bloc.dart

@@ -8,6 +8,7 @@ import 'package:data_repository/data_repository.dart';
 import 'package:equatable/equatable.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/account/bloc/account_bloc.dart';
+import 'package:flutter_news_app_mobile_client_full_source_code/ads/models/ad_theme_style.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/app/bloc/app_bloc.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/shared/services/feed_decorator_service.dart';
 

lib/entity_details/bloc/entity_details_event.dart

@@ -14,7 +14,7 @@ abstract class EntityDetailsEvent extends Equatable {
 /// or an [entityId] and its corresponding [contentType].
 class EntityDetailsLoadRequested extends EntityDetailsEvent {
   const EntityDetailsLoadRequested({
-    required this.theme,
+    required this.adThemeStyle,
     this.entityId,
     this.contentType,
     this.entity,
@@ -32,11 +32,11 @@ class EntityDetailsLoadRequested extends EntityDetailsEvent {
   /// The full entity object, if already available.
   final FeedItem? entity;
 
-  /// The current theme data, required for ad injection.
-  final ThemeData theme;
+  /// The current ad theme style, required for ad injection.
+  final AdThemeStyle adThemeStyle;
 
   @override
-  List<Object?> get props => [entityId, contentType, entity];
+  List<Object?> get props => [entityId, contentType, entity, adThemeStyle];
 }
 
 /// Event to toggle the "follow" status of the currently loaded entity.