chore(client): 归档原型阶段未提交改动（binding/logic/view 分层与各页迭代）

为什么：客户端原型在 14d7bd3 之后又做了一轮（页面分层、发现页、分类滑动、播放器控件等），
一直留在工作区没入库。下一批账号链路要改其中的 app.dart / home_view / player_view / mine_view，
先归档这批既存改动，本批的实际 diff 才说得清边界。

只归档，不改行为：当前工作区 flutter analyze 0 问题、flutter test 148 全过。

test/playback/playback_preload_test.dart

@@ -12,7 +12,7 @@ void main() {
       id: 'ep-$i',
       number: i + 1,
       title: 'Episode $i',
-      assetPath: 'test-$i.mp4',
+      videoUrl: 'https://example.test/$i.mp4',
       isFree: i < 4,
     ),
   );

test/playback/playback_queue_test.dart

@@ -1,26 +1,76 @@
 import 'package:flutter_test/flutter_test.dart';
-import 'package:nontonki/core/data/repositories/catalog_repository.dart';
+import 'package:nontonki/core/data/models/drama.dart';
 import 'package:nontonki/core/data/services/playback_queue.dart';
 
 void main() {
-  test(
-    'home feed advances between dramas, series player between episodes',
-    () async {
-      final dramas = await DemoCatalogRepository().fetchDramas();
-      final home = PlaybackQueue.home(dramas);
-      expect(home.length, 3);
-      expect(home.entryAt(0).drama.id, dramas[0].id);
-      expect(home.entryAt(1).drama.id, dramas[1].id);
-      expect(home.entryAt(1).episode.number, 1);
-      expect(home.nextIndex(0), 1);
-      expect(home.nextIndex(2), isNull);
+  test('home feed advances between dramas, series player between episodes', () {
+    final dramas = [_drama('a', 3), _drama('b', 2), _drama('c', 4)];
 
-      final series = PlaybackQueue.series(dramas[0]);
-      expect(series.length, 3);
-      expect(series.entryAt(0).drama.id, series.entryAt(1).drama.id);
-      expect(series.entryAt(1).episode.number, 2);
-      expect(series.nextIndex(0), 1);
-      expect(series.nextIndex(2), isNull);
-    },
-  );
+    final home = PlaybackQueue.home(dramas);
+    expect(home.length, 3);
+    expect(home.entryAt(0).drama.id, 'a');
+    expect(home.entryAt(1).drama.id, 'b');
+    expect(home.entryAt(1).episode.number, 1);
+    expect(home.nextIndex(0), 1);
+    expect(home.nextIndex(2), isNull);
+
+    final series = PlaybackQueue.series(dramas[0]);
+    expect(series.length, 3);
+    expect(series.entryAt(0).drama.id, series.entryAt(1).drama.id);
+    expect(series.entryAt(1).episode.number, 2);
+    expect(series.nextIndex(0), 1);
+    expect(series.nextIndex(2), isNull);
+  });
+
+  test('dramas without episodes are left out of the home queue', () {
+    final home = PlaybackQueue.home([
+      _drama('a', 2),
+      Drama(
+        id: 'empty',
+        title: '没有剧集',
+        synopsis: '',
+        posterUrl: '/files/empty.jpg',
+      ),
+    ]);
+    expect(home.length, 1);
+    expect(home.entryAt(0).drama.id, 'a');
+  });
+
+  test('a list card with a preview episode plays on the home feed', () {
+    final home = PlaybackQueue.home([
+      Drama.fromCardJson(const {
+        'id': 5,
+        'title': '闪婚后',
+        'cover': '/files/cover.jpg',
+        'totalEpisodes': 77,
+        'preview': {
+          'id': 9,
+          'number': 1,
+          'title': '第 1 集',
+          'isFree': true,
+          'playUrl': '/files/episode/9.mp4',
+        },
+      }),
+    ]);
+
+    expect(home.length, 1);
+    expect(home.entryAt(0).episode.videoUrl, '/files/episode/9.mp4');
+  });
 }
+
+Drama _drama(String id, int episodeCount) => Drama(
+  id: id,
+  title: 'Drama $id',
+  synopsis: '简介 $id',
+  posterUrl: '/files/$id.jpg',
+  episodes: [
+    for (var index = 1; index <= episodeCount; index++)
+      Episode(
+        id: '$id-$index',
+        number: index,
+        title: '第 $index 集',
+        isFree: true,
+        videoUrl: 'https://example.test/$id-$index.mp4',
+      ),
+  ],
+);

test/playback/playback_session_test.dart

@@ -12,7 +12,7 @@ void main() {
       id: 'ep-${i + 1}',
       number: i + 1,
       title: 'Episode ${i + 1}',
-      assetPath: 'assets/media/episode_0${i + 1}.mp4',
+      videoUrl: 'https://example.test/episode_0${i + 1}.mp4',
       isFree: i < 2,
     ),
   );
@@ -99,6 +99,47 @@ void main() {
     await session.close();
   });
 
+  test('pausing then swiping to the next episode resumes playback', () async {
+    final factory = FakeFactory();
+    final session = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+    );
+    await session.select(0);
+    session.setUserWantsPlay(false);
+    await Future<void>.delayed(Duration.zero);
+    expect(session.userWantsPlay, isFalse);
+
+    await session.select(1);
+
+    expect(session.userWantsPlay, isTrue);
+    await Future<void>.delayed(Duration.zero);
+    final playing = session.active;
+    expect(playing, isA<FakePlayer>());
+    expect((playing! as FakePlayer).playCalls, greaterThan(0));
+    await session.close();
+  });
+
+  test('re-selecting the same episode keeps the user pause', () async {
+    final factory = FakeFactory();
+    final session = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+    );
+    await session.select(0);
+    session.setUserWantsPlay(false);
+    await Future<void>.delayed(Duration.zero);
+
+    // 页面重新可见等场景会重复选中同一集，这时不能把暂停改成播放。
+    await session.select(0);
+
+    expect(session.userWantsPlay, isFalse);
+    expect(session.canAutoAdvance, isFalse);
+    await session.close();
+  });
+
   test('automatic advance respects visibility and playback intent', () async {
     final factory = FakeFactory();
     final session = PlaybackSession(

test/playback/seek_progress_bar_test.dart

@@ -78,21 +78,20 @@ void main() {
           body: SeekProgressBar(
             valueListenable: video,
             semanticsLabel: 'Seek video',
-            compactIdle: true,
             onSeek: (_) async {},
           ),
         ),
       ),
     );
-    expect(find.text('00:03'), findsNothing);
+    expect(find.textContaining('00:12'), findsNothing);
     final gesture = await tester.startGesture(
       tester.getCenter(find.byType(Slider)),
     );
     await gesture.moveBy(const Offset(40, 0));
     await tester.pump();
-    expect(find.text('00:12'), findsOneWidget);
+    expect(find.textContaining('/ 00:12'), findsOneWidget);
     await gesture.up();
     await tester.pumpAndSettle();
-    expect(find.text('00:12'), findsNothing);
+    expect(find.textContaining('00:12'), findsNothing);
   });
 }

test/playback/watch_history_test.dart

@@ -1,4 +1,5 @@
 import 'package:flutter_test/flutter_test.dart';
+import 'package:nontonki/core/data/models/drama.dart';
 import 'package:nontonki/core/data/repositories/watch_history_repository.dart';
 import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
 import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';
@@ -51,4 +52,79 @@ void main() {
     expect(await history.lastEpisodeId('profile-a', 'drama-a'), 'episode-2');
     expect(await history.lastEpisodeId('profile-a', 'drama-b'), isNull);
   });
+
+  test('resume prefers the first loaded episode', () async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+    final history = SharedPreferencesWatchHistoryRepository();
+    await history.save(
+      'profile-a',
+      'drama-a',
+      'episode-1',
+      const Duration(seconds: 3),
+    );
+    await history.save(
+      'profile-a',
+      'drama-a',
+      'episode-2',
+      const Duration(seconds: 5),
+    );
+
+    final drama = Drama(
+      id: 'drama-a',
+      title: 'title',
+      synopsis: 'synopsis',
+      posterUrl: '',
+      episodes: const [
+        Episode(id: 'episode-1', number: 1, title: 'E1', isFree: true),
+        Episode(id: 'episode-2', number: 2, title: 'E2', isFree: true),
+      ],
+    );
+
+    expect(
+      await history.resumePositionFor('profile-a', drama),
+      const Duration(seconds: 3),
+    );
+  });
+
+  test('resume falls back to the last watched episode for a list card', () async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+    final history = SharedPreferencesWatchHistoryRepository();
+    await history.save(
+      'profile-a',
+      'drama-a',
+      'episode-2',
+      const Duration(seconds: 5),
+    );
+
+    const card = Drama(
+      id: 'drama-a',
+      title: 'title',
+      synopsis: 'synopsis',
+      posterUrl: '',
+      totalEpisodes: 12,
+    );
+
+    expect(
+      await history.resumePositionFor('profile-a', card),
+      const Duration(seconds: 5),
+    );
+  });
+
+  test('a list card with no history has no resume position', () async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+    final history = SharedPreferencesWatchHistoryRepository();
+
+    const card = Drama(
+      id: 'drama-b',
+      title: 'title',
+      synopsis: 'synopsis',
+      posterUrl: '',
+      totalEpisodes: 12,
+    );
+
+    expect(await history.resumePositionFor('profile-a', card), isNull);
+  });
 }