fix(player): 解锁状态登录期内共享，重进播放页不再丢解锁

解锁记录原本是播放页实例的私有集合，退出再进入会先闪一次锁定态，还会
被 selectLocked 提前释放播放器。改为进程内共享的 UnlockedEpisodeRegistry，
由全局注入并在登录态变化时清空；播放器三处渲染分支统一走同一判定，
会话锁态只约束当前页，避免相邻预加载页被误判为锁定。

lib/pages/player/player_view.dart

@@ -20,6 +20,7 @@ import '../../core/data/services/playback_position_cache.dart';
 import '../../core/data/services/playback_session.dart';
 import '../../core/data/services/sprite_thumbnail_axis.dart';
 import '../../core/data/services/playback_thumbnail_service.dart';
+import '../../core/data/services/unlocked_episode_registry.dart';
 import '../../core/data/services/video_player_port.dart';
 import '../../core/data/services/wallet_controller.dart';
 import '../../core/formatting/error_text.dart';
@@ -167,6 +168,7 @@ class _PlayerPageState extends State<PlayerPage>
       history: context.read<WatchHistoryRepository>(),
       playback: context.read<PlaybackRepository>(),
       positionCache: context.read<PlaybackPositionCache>(),
+      unlockedEpisodes: _readUnlockedEpisodes(context),
       wallet: widget.wallet,
       downloads: widget.downloads,
       isSignedIn: () => context.read<AuthController>().isSignedIn,
@@ -349,6 +351,16 @@ class _PlayerPageState extends State<PlayerPage>
     setState(() => _playbackSpeed = value);
   }
 
+  /// 全局解锁登记表（登录期内共享）；直接构造播放页的测试没有 Provider，
+  /// 返回 null 让 PlayerLogic 退化成页面自用的一份。
+  UnlockedEpisodeRegistry? _readUnlockedEpisodes(BuildContext context) {
+    try {
+      return context.read<UnlockedEpisodeRegistry>();
+    } on ProviderNotFoundException {
+      return null;
+    }
+  }
+
   void _hideChrome() {
     if (!_chromeVisible) return;
     setState(() => _chromeVisible = false);
@@ -956,10 +968,7 @@ class _PlayerPageState extends State<PlayerPage>
     }
     final episode = _resolvedEpisode(index);
     final selected = index == currentIndex;
-    final locked =
-        logic.isEpisodeLocked(episode) ||
-        (selected && logic.session.isLocked) ||
-        logic.blockedEpisodeId == episode.id;
+    final locked = logic.isEpisodeBlockedFor(episode, index);
     final port = locked
         ? null
         : (selected ? logic.session.active : null) ??
@@ -1042,10 +1051,7 @@ class _PlayerPageState extends State<PlayerPage>
     final drama = entry.drama;
     final episode = _resolvedEpisode(index);
     final selected = index == logic.session.currentIndex;
-    final locked =
-        logic.isEpisodeLocked(episode) ||
-        logic.session.isLocked ||
-        logic.blockedEpisodeId == episode.id;
+    final locked = logic.isEpisodeBlockedFor(episode, index);
     // Selection changes before the prepared slot is promoted. Use its controller
     // throughout the handoff instead of briefly falling back to a placeholder.
     final port = locked
@@ -1294,10 +1300,7 @@ class _PlayerPageState extends State<PlayerPage>
     final drama = entry.drama;
     final episode = _resolvedEpisode(index);
     final selected = index == logic.session.currentIndex;
-    final locked =
-        logic.isEpisodeLocked(episode) ||
-        logic.session.isLocked ||
-        logic.blockedEpisodeId == episode.id;
+    final locked = logic.isEpisodeBlockedFor(episode, index);
     final port = locked
         ? null
         : (selected ? logic.session.active : null) ??