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。

lib/core/data/models/home_feed.dart

@@ -0,0 +1,86 @@
+import 'drama.dart';
+
+/// 首页/发现页聚合数据，一次请求拿到轮播与分区。
+class HomeFeed {
+  const HomeFeed({this.banners = const [], this.sections = const []});
+
+  final List<FeedBanner> banners;
+  final List<FeedSection> sections;
+
+  bool get isEmpty => sections.every((section) => section.dramas.isEmpty);
+
+  /// 分区打平后的短剧列表，供现有 UI 的横滑/竖滑复用；按 id 去重。
+  List<Drama> get dramas {
+    final seen = <String>{};
+    final result = <Drama>[];
+    for (final section in sections) {
+      for (final drama in section.dramas) {
+        if (seen.add(drama.id)) result.add(drama);
+      }
+    }
+    return result;
+  }
+
+  factory HomeFeed.fromJson(Map<String, dynamic> json) {
+    final banners = (json['banners'] as List? ?? const [])
+        .whereType<Map<String, dynamic>>()
+        .map(FeedBanner.fromJson)
+        .toList();
+    final sections = (json['sections'] as List? ?? const [])
+        .whereType<Map<String, dynamic>>()
+        .map(FeedSection.fromJson)
+        .toList();
+    return HomeFeed(banners: banners, sections: sections);
+  }
+}
+
+class FeedSection {
+  const FeedSection({
+    required this.code,
+    required this.title,
+    this.dramas = const [],
+  });
+
+  final String code;
+  final String title;
+  final List<Drama> dramas;
+
+  factory FeedSection.fromJson(Map<String, dynamic> json) {
+    return FeedSection(
+      code: json['code'] as String? ?? '',
+      title: json['title'] as String? ?? '',
+      dramas: (json['dramas'] as List? ?? const [])
+          .whereType<Map<String, dynamic>>()
+          .map(Drama.fromCardJson)
+          .toList(),
+    );
+  }
+}
+
+class FeedBanner {
+  const FeedBanner({
+    required this.id,
+    required this.imageUrl,
+    this.linkType = 'NONE',
+    this.linkValue = '',
+  });
+
+  final String id;
+  final String imageUrl;
+  final String linkType;
+  final String linkValue;
+
+  /// 点击轮播要打开的短剧 id，非短剧跳转返回 null。
+  String? get dramaId => linkType == 'DRAMA' && linkValue.isNotEmpty
+      ? linkValue
+      : null;
+
+  factory FeedBanner.fromJson(Map<String, dynamic> json) {
+    return FeedBanner(
+      id: (json['id'] ?? '').toString(),
+      imageUrl: json['imageUrl'] as String? ?? '',
+      linkType: json['linkType'] as String? ?? 'NONE',
+      linkValue: json['linkValue'] as String? ?? '',
+    );
+  }
+}

lib/core/data/models/play_ticket.dart

@@ -0,0 +1,37 @@
+/// 播放票据：客户端据此决定直接播放、提示解锁还是提示暂无片源。
+class PlayTicket {
+  const PlayTicket({
+    required this.episodeId,
+    required this.accessible,
+    required this.accessType,
+    this.playUrl = '',
+    this.durationSec = 0,
+    this.unlockCoin = 0,
+  });
+
+  static const String free = 'FREE';
+  static const String coinRequired = 'COIN_REQUIRED';
+  static const String vipRequired = 'VIP_REQUIRED';
+  static const String noMedia = 'NO_MEDIA';
+
+  final String episodeId;
+  final bool accessible;
+  final String accessType;
+  final String playUrl;
+  final int durationSec;
+  final int unlockCoin;
+
+  bool get needsUnlock =>
+      accessType == coinRequired || accessType == vipRequired;
+
+  factory PlayTicket.fromJson(Map<String, dynamic> json) {
+    return PlayTicket(
+      episodeId: (json['episodeId'] ?? '').toString(),
+      accessible: json['accessible'] == true,
+      accessType: json['accessType'] as String? ?? noMedia,
+      playUrl: json['playUrl'] as String? ?? '',
+      durationSec: (json['durationSec'] as num?)?.toInt() ?? 0,
+      unlockCoin: (json['unlockCoin'] as num?)?.toInt() ?? 0,
+    );
+  }
+}

lib/core/data/remote/catalog_api.dart

@@ -0,0 +1,36 @@
+import '../models/drama.dart';
+import '../models/home_feed.dart';
+import '../models/play_ticket.dart';
+import 'api_client.dart';
+
+/// 客户端目录接口，对应后端 `/app/**`。
+class CatalogApi {
+  const CatalogApi(this._client);
+
+  final ApiClient _client;
+
+  Future<HomeFeed> homeFeed() async {
+    return HomeFeed.fromJson(_asMap(await _client.get('/app/home/feed')));
+  }
+
+  Future<HomeFeed> discoverFeed() async {
+    return HomeFeed.fromJson(_asMap(await _client.get('/app/discover/feed')));
+  }
+
+  Future<Drama> dramaDetail(String dramaId) async {
+    return Drama.fromDetailJson(
+      _asMap(await _client.get('/app/dramas/$dramaId')),
+    );
+  }
+
+  Future<PlayTicket> playTicket(String episodeId) async {
+    return PlayTicket.fromJson(
+      _asMap(await _client.get('/app/episodes/$episodeId/play')),
+    );
+  }
+
+  Map<String, dynamic> _asMap(Object? data) {
+    if (data is Map<String, dynamic>) return data;
+    throw const ApiException(-1, '返回数据格式异常');
+  }
+}