chore(client): 归档原型阶段新增文件（配置、主题、模型与测试）

为什么：上一批归档只覆盖了「已跟踪文件的修改」，原型阶段新增的文件（app_config、theme、
home_feed/play_ticket 模型、catalog_api、测试目录等）还是未入库状态 —— 而已入库的代码会 import 它们，
留在工作区会导致 HEAD 处的代码编译不过。一并归档，让 HEAD 自洽。

纯归档，无行为改动。

test/support/fake_catalog.dart

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+import 'package:nontonki/core/data/models/drama.dart';
+import 'package:nontonki/core/data/models/home_feed.dart';
+import 'package:nontonki/core/data/models/play_ticket.dart';
+import 'package:nontonki/core/data/repositories/catalog_repository.dart';
+
+/// 测试用目录数据：三部分区里的短剧，标题与后端演示数据保持一致。
+class FakeCatalogRepository implements CatalogRepository {
+  FakeCatalogRepository({List<Drama>? dramas}) : dramas = dramas ?? demoDramas;
+
+  final List<Drama> dramas;
+
+  @override
+  Future<HomeFeed> fetchHomeFeed() async => _feed();
+
+  @override
+  Future<HomeFeed> fetchDiscoverFeed() async => _feed();
+
+  @override
+  Future<Drama> fetchDrama(String dramaId) async {
+    return dramas.firstWhere((drama) => drama.id == dramaId);
+  }
+
+  @override
+  Future<PlayTicket> resolvePlay(String episodeId) async {
+    return PlayTicket(
+      episodeId: episodeId,
+      accessible: true,
+      accessType: PlayTicket.free,
+      playUrl: 'https://example.test/$episodeId.mp4',
+    );
+  }
+
+  HomeFeed _feed() => HomeFeed(
+    sections: [FeedSection(code: 'hot', title: '热门推荐', dramas: dramas)],
+  );
+}
+
+final List<Drama> demoDramas = [
+  _drama(
+    'the-signal-demo',
+    'The Signal',
+    'Suspense · Mystery',
+    format: 1,
+  ),
+  _drama(
+    'city-lights-demo',
+    'City Lights & Velvet Nights',
+    'Urban Romance',
+    format: 8,
+  ),
+  _drama(
+    'vengeance-demo',
+    'Vengeance Rising',
+    'Action · Thriller',
+    format: 15,
+  ),
+];
+
+Drama _drama(
+  String id,
+  String title,
+  String genre, {
+  required int format,
+}) => Drama(
+  id: id,
+  title: title,
+  synopsis: '$title synopsis',
+  posterUrl: '/files/$id.png',
+  genre: genre,
+  detailLoaded: true,
+  episodes: [
+    for (var index = 0; index < 7; index++)
+      Episode(
+        id: '$id-${index + 1}',
+        number: index + 1,
+        title: 'Episode ${index + 1}',
+        isFree: true,
+        videoUrl: 'https://example.test/$format-$index.mp4',
+      ),
+  ],
+);

test/support/fake_watch_history.dart

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+import 'package:nontonki/core/data/repositories/watch_history_repository.dart';
+
+/// Records every history interaction so tests can assert on the key it used.
+class FakeWatchHistory implements WatchHistoryRepository {
+  final List<String> reads = [];
+  final List<String> writes = [];
+
+  /// Position returned by [positionFor] when [failReads] is false.
+  Duration? saved;
+
+  /// Last episode returned by [lastEpisodeId].
+  String? lastEpisode;
+
+  bool failReads = false;
+  bool failWrites = false;
+
+  @override
+  Future<Duration?> positionFor(
+    String profileId,
+    String dramaId,
+    String episodeId,
+  ) async {
+    reads.add('$profileId|$dramaId|$episodeId');
+    if (failReads) throw StateError('history unavailable');
+    return saved;
+  }
+
+  @override
+  Future<String?> lastEpisodeId(String profileId, String dramaId) async {
+    if (failReads) throw StateError('history unavailable');
+    return lastEpisode;
+  }
+
+  @override
+  Future<void> save(
+    String profileId,
+    String dramaId,
+    String episodeId,
+    Duration position,
+  ) async {
+    if (failWrites) throw StateError('history unavailable');
+    writes.add('$profileId|$dramaId|$episodeId|${position.inMilliseconds}');
+  }
+}