refactor(headlines-feed): update HeadlinesFeedBloc events to use AdThemeStyle

- Replace Theme.of(context) with AdThemeStyle.fromTheme(Theme.of(context)) in HeadlinesFeedBloc events
- Add import for AdThemeStyle model
- Update affected methods to use adThemeStyle parameter instead of theme

Author: fulleni

lib/headlines-feed/view/headlines_feed_page.dart

@@ -6,6 +6,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.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_feed_item.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/ads/widgets/widgets.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/headlines-feed/bloc/headlines_feed_bloc.dart';
@@ -64,7 +65,7 @@ class _HeadlinesFeedPageState extends State<HeadlinesFeedPage> {
         state.hasMore &&
         state.status != HeadlinesFeedStatus.loadingMore) {
       context.read<HeadlinesFeedBloc>().add(
-        HeadlinesFeedFetchRequested(theme: Theme.of(context)),
+        HeadlinesFeedFetchRequested(adThemeStyle: AdThemeStyle.fromTheme(Theme.of(context))),
       );
     }
   }
@@ -184,7 +185,7 @@ class _HeadlinesFeedPageState extends State<HeadlinesFeedPage> {
               return FailureStateWidget(
                 exception: state.error!,
                 onRetry: () => context.read<HeadlinesFeedBloc>().add(
-                  HeadlinesFeedRefreshRequested(theme: Theme.of(context)),
+                  HeadlinesFeedRefreshRequested(adThemeStyle: AdThemeStyle.fromTheme(Theme.of(context))),
                 ),
               );
             }
@@ -203,7 +204,7 @@ class _HeadlinesFeedPageState extends State<HeadlinesFeedPage> {
                     const SizedBox(height: AppSpacing.lg),
                     ElevatedButton(
                       onPressed: () => context.read<HeadlinesFeedBloc>().add(
-                        HeadlinesFeedFiltersCleared(theme: Theme.of(context)),
+                        HeadlinesFeedFiltersCleared(adThemeStyle: AdThemeStyle.fromTheme(Theme.of(context))),
                       ),
                       child: Text(l10n.headlinesFeedClearFiltersButton),
                     ),
@@ -215,7 +216,7 @@ class _HeadlinesFeedPageState extends State<HeadlinesFeedPage> {
             return RefreshIndicator(
               onRefresh: () async {
                 context.read<HeadlinesFeedBloc>().add(
-                  HeadlinesFeedRefreshRequested(theme: Theme.of(context)),
+                  HeadlinesFeedRefreshRequested(adThemeStyle: AdThemeStyle.fromTheme(Theme.of(context))),
                 );
               },
               child: ListView.separated(