feat(client): 对接详情/播放/进度续看/收藏（K1 看剧闭环）+ 三态 UI

后端接口从 6 个扩到 13 个，全部走真数据：

- 新增 api：playback_api（/app/episodes/{id}/play）、watch_api（/app/watch/*）、
  library_api（/app/favorites*）；票据从 CatalogApi 搬到 PlaybackApi
- 新增 repository：PlaybackRepository（含票据 TTL 缓存，默认 10 分钟，时钟可注入）、
  FavoriteRepository、WatchHistoryRepository 换成服务端模型（每剧一条续看记录，删掉 demoProfileId）
- PlayerLogic：起播前取票（拿不到给三态 UI，失败可重试）；accessType 驱动锁定文案，
  不在前端猜；签名地址原样交给播放器（只补 host，不动 path/query）；
  进度上报节流 5s → 10s，切集/退出/切后台各补一次，播完带 finished
- 续看定位：服务端记录里的那一集才 seek（其它集从头播），续看位置进详情/播放页时读一次
- FavoriteController：收藏以服务端为准，乐观更新 + 失败回滚；退出登录清空
- UI 三态：详情页（加载/失败可重试/空剧集 + 续看进度条 + 收藏按钮）、
  播放页（票据加载中/失败可重试/后端判定不可播）、我的页（续看失败可重试、收藏三态、最近观看）
- l10n 新增 8 个键（en/zh/id 三份）：网络/进度/收藏失败、锁定提示、续看文案等

测试：flutter test 188 全过（存量 27 个测试文件未跑红）；新增票据过期重取、进度节流、
续看定位、收藏回滚、签名 query 原样保留、真实后端端到端联调（live_watch_flow）

test/catalog/catalog_controller_test.dart

@@ -1,7 +1,6 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:fruitshorts/core/data/models/drama.dart';
 import 'package:fruitshorts/core/data/models/home_feed.dart';
-import 'package:fruitshorts/core/data/models/play_ticket.dart';
 import 'package:fruitshorts/core/data/repositories/catalog_repository.dart';
 import 'package:fruitshorts/core/data/services/catalog_controller.dart';
 
@@ -53,30 +52,6 @@ void main() {
     expect(controller.dramas.single.episodes, hasLength(2));
   });
 
-  test('should_write_play_url_for_free_episode_and_keep_locked_episode_empty_when_ticket_is_issued', () async {
-    final repository = ScriptedCatalogRepository();
-    final controller = CatalogController(repository);
-    repository.tickets['10'] = const PlayTicket(
-      episodeId: '10',
-      accessible: true,
-      accessType: PlayTicket.free,
-      playUrl: '/files/episode/10.mp4',
-    );
-
-    const free = Episode(id: '10', number: 1, title: '免费集', isFree: true);
-    final resolved = await controller.resolvePlay(free);
-    expect(resolved.videoUrl, '/files/episode/10.mp4');
-
-    const locked = Episode(
-      id: '11',
-      number: 2,
-      title: '锁定集',
-      isFree: false,
-      locked: true,
-    );
-    final lockedResolved = await controller.resolvePlay(locked);
-    expect(lockedResolved.videoUrl, isEmpty);
-  });
 }
 
 Drama _card(String id) => Drama(
@@ -102,7 +77,6 @@ class ScriptedCatalogRepository implements CatalogRepository {
   bool fail = false;
   HomeFeed feed = const HomeFeed();
   int detailCalls = 0;
-  final Map<String, PlayTicket> tickets = {};
 
   @override
   Future<HomeFeed> fetchHomeFeed() async {
@@ -119,13 +93,4 @@ class ScriptedCatalogRepository implements CatalogRepository {
     return _detail(dramaId);
   }
 
-  @override
-  Future<PlayTicket> resolvePlay(String episodeId) async {
-    return tickets[episodeId] ??
-        PlayTicket(
-          episodeId: episodeId,
-          accessible: false,
-          accessType: PlayTicket.noMedia,
-        );
-  }
 }