feat(shared): add headline actions bottom sheet

- Create HeadlineActionsBottomSheet widget for sharing and bookmarking headlines
- Update imports in headlines_feed_page.dart
- Add export for headline_actions_bottom_sheet.dart in widgets.dart

Author: fulleni

lib/headlines-feed/view/headlines_feed_page.dart

@@ -11,7 +11,8 @@ import 'package:flutter_news_app_mobile_client_full_source_code/headlines-feed/b
 import 'package:flutter_news_app_mobile_client_full_source_code/headlines-feed/widgets/feed_sliver_app_bar.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/headlines-feed/widgets/saved_filters_bar.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/l10n/l10n.dart';
-import 'package:flutter_news_app_mobile_client_full_source_code/shared/widgets/feed_core/feed_core.dart';
+import 'package:flutter_news_app_mobile_client_full_source_code/l10n/l10n.dart';
+import 'package:flutter_news_app_mobile_client_full_source_code/shared/shared.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/shared/widgets/headline_actions_bottom_sheet.dart';
 import 'package:go_router/go_router.dart';
 import 'package:ui_kit/ui_kit.dart';

lib/shared/widgets/headline_actions_bottom_sheet.dart

@@ -0,0 +1,85 @@
+import 'package:core/core.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.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/l10n/l10n.dart';
+import 'package:share_plus/share_plus.dart';
+import 'package:ui_kit/ui_kit.dart';
+
+/// {@template headline_actions_bottom_sheet}
+/// A modal bottom sheet that displays actions for a given headline, such as
+/// sharing and bookmarking.
+/// {@endtemplate}
+class HeadlineActionsBottomSheet extends StatelessWidget {
+  /// {@macro headline_actions_bottom_sheet}
+  const HeadlineActionsBottomSheet({required this.headline, super.key});
+
+  /// The headline for which to display actions.
+  final Headline headline;
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizationsX(context).l10n;
+    return BlocBuilder<AppBloc, AppState>(
+      builder: (context, state) {
+        final isBookmarked = state.userContentPreferences?.savedHeadlines
+                .any((saved) => saved.id == headline.id) ??
+            false;
+
+        return Wrap(
+          children: [
+            Padding(
+              padding: const EdgeInsets.all(AppSpacing.md),
+              child: Text(
+                l10n.headlineActionsModalTitle,
+                style: Theme.of(context).textTheme.titleLarge,
+              ),
+            ),
+            ListTile(
+              leading: const Icon(Icons.share_outlined),
+              title: Text(l10n.shareActionLabel),
+              onTap: () {
+                Navigator.of(context).pop();
+                Share.share(headline.url);
+              },
+            ),
+            ListTile(
+              leading: Icon(
+                isBookmarked
+                    ? Icons.bookmark_added
+                    : Icons.bookmark_add_outlined,
+              ),
+              title: Text(
+                isBookmarked
+                    ? l10n.removeBookmarkActionLabel
+                    : l10n.bookmarkActionLabel,
+              ),
+              onTap: () {
+                final userContentPreferences = state.userContentPreferences;
+                if (userContentPreferences == null) return;
+
+                final currentSaved =
+                    List<Headline>.from(userContentPreferences.savedHeadlines);
+
+                if (isBookmarked) {
+                  currentSaved.removeWhere((h) => h.id == headline.id);
+                } else {
+                  currentSaved.insert(0, headline);
+                }
+
+                context.read<AppBloc>().add(
+                      AppUserContentPreferencesChanged(
+                        preferences: userContentPreferences.copyWith(
+                          savedHeadlines: currentSaved,
+                        ),
+                      ),
+                    );
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+  }
+}

lib/shared/widgets/widgets.dart

@@ -1,6 +1,7 @@
 export 'confirmation_dialog.dart';
 export 'content_limitation_bottom_sheet.dart';
 export 'feed_core/feed_core.dart';
+export 'headline_actions_bottom_sheet.dart';
 export 'multi_select_search_page.dart';
 export 'notification_indicator.dart';
 export 'user_avatar.dart';