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_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',
+      ),
+  ],
+);