Fix video controls, tag input and collection deletion

test/backend/isar_integration_test.dart

@@ -139,6 +139,47 @@ void main() {
         '2');
   });
 
+  test('deleted collection stays deleted after repository reload', () async {
+    final repository = CollectionRepository(databaseService, postRepository);
+    final service = CollectionService(repository);
+    final created = await service.createCollection('Temp', null) as Success;
+    final item = post('collection-delete');
+
+    await service.addPostToCollection(created.data.id, item);
+    await service.deleteCollection(created.data.id);
+
+    final reloadedService = CollectionService(
+      CollectionRepository(databaseService, postRepository),
+    );
+
+    expect((await reloadedService.getCollections() as Success).data, isEmpty);
+    expect(
+      (await reloadedService.getCollectionPosts(created.data.id) as Success)
+          .data,
+      isEmpty,
+    );
+  });
+
+  test('settings export keeps blacklist whitelist and smart rules', () async {
+    final service = SettingsService(databaseService);
+    await service.updateSettings(
+      AppSettings.defaults.copyWith(
+        blacklistedTags: ['blocked'],
+        whitelistedTags: ['allowed'],
+        smartBlacklistRules: ['provider:e621 score:<10'],
+      ),
+    );
+
+    final exported = await service.exportSettingsToJson() as Success<String>;
+
+    expect(exported.data, contains('"blacklistedTags"'));
+    expect(exported.data, contains('"blocked"'));
+    expect(exported.data, contains('"whitelistedTags"'));
+    expect(exported.data, contains('"allowed"'));
+    expect(exported.data, contains('"smartBlacklistRules"'));
+    expect(exported.data, contains('provider:e621 score:<10'));
+  });
+
   test('cache service prunes to max item count', () async {
     final service = CacheService(databaseService);
 

test/shared/video_error_overlay_test.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:gel_rule_app/features/post/presentation/widgets/post_media_viewer.dart';
+
+void main() {
+  testWidgets('video error retry button invokes callback', (tester) async {
+    var retried = false;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: VideoErrorOverlay(
+            message: 'network failed',
+            onRetry: () => retried = true,
+          ),
+        ),
+      ),
+    );
+
+    await tester.tap(find.text('Retry'));
+    await tester.pump();
+
+    expect(retried, isTrue);
+  });
+}