Rebrand to Lunaris and add CosBooru providers

test/backend/isar_integration_test.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 
 import 'package:flutter_test/flutter_test.dart';
+import 'package:gel_rule_app/backend/models/content_provider_config.dart';
 import 'package:gel_rule_app/backend/models/post.dart';
 import 'package:gel_rule_app/backend/repositories/collection_repository.dart';
 import 'package:gel_rule_app/backend/repositories/favorite_repository.dart';
@@ -73,11 +74,52 @@ void main() {
       'e621',
       'e926',
       'realbooru',
+      'xbooru',
+      'cosbooru',
     ]);
     expect(
       providers.singleWhere((provider) => provider.id == 'realbooru').enabled,
       isFalse,
     );
+    expect(
+      providers.singleWhere((provider) => provider.id == 'cosbooru').enabled,
+      isTrue,
+    );
+    final xbooru = providers.singleWhere((provider) => provider.id == 'xbooru');
+    expect(xbooru.enabled, isTrue);
+    expect(xbooru.baseUrl, 'https://xbooru.com');
+    expect(xbooru.apiType, 'gelbooru');
+    final cosbooru =
+        providers.singleWhere((provider) => provider.id == 'cosbooru');
+    expect(cosbooru.baseUrl, 'https://cos.lycore.co');
+    expect(cosbooru.apiType, 'danbooru');
+  });
+
+  test('provider repository migrates old CosBooru config', () async {
+    final repository = ProviderRepository(databaseService);
+    final now = DateTime(2026);
+    await repository.saveProvider(ContentProviderConfig(
+      id: 'cosbooru',
+      name: 'CosBooru',
+      baseUrl: 'https://cos.booru.nl',
+      apiType: 'gelbooru',
+      enabled: false,
+      priority: 99,
+      timeoutSeconds: 10,
+      customHeaders: const {},
+      createdAt: now,
+      updatedAt: now,
+    ));
+
+    await repository.ensureSeedProviders();
+    final providers = (await repository.getProviders() as Success).data;
+    final cosbooru =
+        providers.singleWhere((provider) => provider.id == 'cosbooru');
+
+    expect(cosbooru.baseUrl, 'https://cos.lycore.co');
+    expect(cosbooru.apiType, 'danbooru');
+    expect(cosbooru.enabled, isTrue);
+    expect(cosbooru.priority, 9);
   });
 
   test('settings saveEnabledProviders updates provider configs', () async {

test/backend/provider_parser_test.dart

@@ -5,6 +5,7 @@ import 'package:gel_rule_app/backend/mappers/gelbooru_mapper.dart';
 import 'package:gel_rule_app/backend/mappers/moebooru_mapper.dart';
 import 'package:gel_rule_app/backend/mappers/rule34_mapper.dart';
 import 'package:gel_rule_app/backend/models/content_provider_config.dart';
+import 'package:gel_rule_app/backend/providers/danbooru_provider.dart';
 import 'package:gel_rule_app/backend/providers/provider_factory.dart';
 import 'package:gel_rule_app/backend/providers/realbooru_provider.dart';
 import 'package:gel_rule_app/backend/repositories/provider_repository.dart';
@@ -205,7 +206,7 @@ void main() {
     expect(posts.single.rating, 'unknown');
   });
 
-  test('seed providers include enabled Realbooru', () {
+  test('seed providers include CosBooru and no Paheal', () {
     final realbooru = ProviderRepository.seedProviders()
         .where((provider) => provider.id == 'realbooru')
         .single;
@@ -213,6 +214,23 @@ void main() {
     expect(realbooru.enabled, isFalse);
     expect(realbooru.apiType, 'realbooru');
     expect(realbooru.baseUrl, 'https://realbooru.com');
+    expect(
+      ProviderRepository.seedProviders()
+          .where((provider) => provider.id == 'paheal'),
+      isEmpty,
+    );
+    final cosbooru = ProviderRepository.seedProviders()
+        .where((provider) => provider.id == 'cosbooru')
+        .single;
+    final xbooru = ProviderRepository.seedProviders()
+        .where((provider) => provider.id == 'xbooru')
+        .single;
+    expect(xbooru.enabled, isTrue);
+    expect(xbooru.apiType, 'gelbooru');
+    expect(xbooru.baseUrl, 'https://xbooru.com');
+    expect(cosbooru.enabled, isTrue);
+    expect(cosbooru.apiType, 'danbooru');
+    expect(cosbooru.baseUrl, 'https://cos.lycore.co');
   });
 
   test('provider factory creates Realbooru provider', () {
@@ -232,4 +250,22 @@ void main() {
 
     expect(provider, isA<RealbooruProvider>());
   });
+
+  test('provider factory creates CosBooru as Danbooru provider', () {
+    final now = DateTime(2026);
+    final provider = ProviderFactory().create(ContentProviderConfig(
+      id: 'cosbooru',
+      name: 'CosBooru',
+      baseUrl: 'https://cos.lycore.co',
+      apiType: 'danbooru',
+      enabled: true,
+      priority: 8,
+      timeoutSeconds: 20,
+      customHeaders: const {},
+      createdAt: now,
+      updatedAt: now,
+    ));
+
+    expect(provider, isA<DanbooruProvider>());
+  });
 }