switch to nullability package

app/lib/features/web_feed/presentation/screens/feed_article.dart

@@ -5,7 +5,6 @@ import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:lensai/core/providers/format.dart';
 import 'package:lensai/core/routing/routes.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/geckoview/domain/repositories/tab.dart';
 import 'package:lensai/features/web_feed/data/models/feed_link.dart';
 import 'package:lensai/features/web_feed/domain/providers.dart';
@@ -16,6 +15,7 @@ import 'package:lensai/features/web_feed/presentation/widgets/tags_horizontal_li
 import 'package:lensai/presentation/widgets/failure_widget.dart';
 import 'package:lensai/utils/markdown/image_extractor.dart';
 import 'package:lensai/utils/ui_helper.dart';
+import 'package:nullability/nullability.dart';
 
 enum _Pages { summary, content }
 

app/lib/features/web_feed/presentation/screens/feed_article_list.dart

@@ -2,7 +2,6 @@ import 'package:fading_scroll/fading_scroll.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/web_feed/domain/providers.dart';
 import 'package:lensai/features/web_feed/domain/providers/article_filter.dart';
 import 'package:lensai/features/web_feed/presentation/controllers/fetch_articles.dart';
@@ -10,6 +9,7 @@ import 'package:lensai/features/web_feed/presentation/widgets/feed_article_card.
 import 'package:lensai/presentation/hooks/listenable_callback.dart';
 import 'package:lensai/presentation/widgets/failure_widget.dart';
 import 'package:lensai/presentation/widgets/speech_to_text_button.dart';
+import 'package:nullability/nullability.dart';
 
 class FeedArticleListScreen extends HookConsumerWidget {
   final Uri? feedId;

app/lib/features/web_feed/presentation/screens/feed_edit.dart

@@ -4,7 +4,6 @@ import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
 import 'package:go_router/go_router.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/extensions/uri.dart';
 import 'package:lensai/features/web_feed/data/database/database.dart';
 import 'package:lensai/features/web_feed/data/models/feed_category.dart';
@@ -15,6 +14,7 @@ import 'package:lensai/presentation/widgets/failure_widget.dart';
 import 'package:lensai/presentation/widgets/url_icon.dart';
 import 'package:lensai/utils/form_validators.dart';
 import 'package:lensai/utils/uri_parser.dart' as uri_parser;
+import 'package:nullability/nullability.dart';
 
 enum _DialogMode { create, edit }
 

app/lib/features/web_feed/presentation/select_feed_dialog.dart

@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:lensai/core/routing/routes.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/web_feed/domain/providers.dart';
 import 'package:lensai/presentation/widgets/failure_widget.dart';
+import 'package:nullability/nullability.dart';
 import 'package:skeletonizer/skeletonizer.dart';
 
 class SelectFeedDialog extends HookConsumerWidget {

app/lib/features/web_feed/presentation/widgets/authors_horizontal_list.dart

@@ -1,7 +1,7 @@
 import 'package:fading_scroll/fading_scroll.dart';
 import 'package:flutter/material.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/web_feed/data/models/feed_author.dart';
+import 'package:nullability/nullability.dart';
 
 class AuthorsHorizontalList extends StatelessWidget {
   late final List<Widget> _authors;

app/lib/features/web_feed/presentation/widgets/feed_article_card.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:lensai/core/routing/routes.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/extensions/uri.dart';
 import 'package:lensai/features/web_feed/data/models/feed_article.dart';
 import 'package:lensai/features/web_feed/data/models/feed_article_query_result.dart';
@@ -14,6 +13,7 @@ import 'package:lensai/features/web_feed/extensions/feed_article.dart';
 import 'package:lensai/features/web_feed/presentation/widgets/authors_horizontal_list.dart';
 import 'package:lensai/features/web_feed/presentation/widgets/tags_horizontal_list.dart';
 import 'package:lensai/presentation/widgets/url_icon.dart';
+import 'package:nullability/nullability.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
 class FeedArticleCard extends HookConsumerWidget {

app/lib/features/web_feed/presentation/widgets/feed_card.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:lensai/core/routing/routes.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/extensions/uri.dart';
 import 'package:lensai/features/web_feed/data/database/database.dart';
 import 'package:lensai/features/web_feed/domain/providers.dart';
@@ -10,6 +9,7 @@ import 'package:lensai/features/web_feed/presentation/widgets/authors_horizontal
 import 'package:lensai/features/web_feed/presentation/widgets/tags_horizontal_list.dart';
 import 'package:lensai/presentation/widgets/rounded_text.dart';
 import 'package:lensai/presentation/widgets/url_icon.dart';
+import 'package:nullability/nullability.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
 class FeedCard extends HookConsumerWidget {

app/lib/features/web_feed/presentation/widgets/tags_horizontal_list.dart

@@ -1,7 +1,7 @@
 import 'package:fading_scroll/fading_scroll.dart';
 import 'package:flutter/material.dart';
-import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/web_feed/data/models/feed_category.dart';
+import 'package:nullability/nullability.dart';
 
 class TagsHorizontalList extends StatelessWidget {
   late final List<Widget> _tags;