fix(player): 收敛播放页入口加载态

lib/pages/player/player_view.dart

@@ -142,11 +142,11 @@ class _PlayerPageState extends State<PlayerPage>
   bool _presentationActive = false;
   bool _leavingHandoff = false;
   bool _preparingFullPlayer = false;
-  int? _loadingIndex;
   int? _videoReadyIndex;
   bool _loadingVisible = false;
   bool _loadingRemoved = true;
   bool _loadingFadeScheduled = false;
+  bool _loggedLoadingUiVisible = false;
   final Set<String> _precachedPosterUrls = {};
 
   /// 收藏切换后的本地增量：基准是详情快照，切换成功按服务端状态 ±1。
@@ -179,10 +179,16 @@ class _PlayerPageState extends State<PlayerPage>
       initialUserWantsPlay: handoff?.sourceUserWantsPlay ?? true,
     );
     _pageController = logic.pages;
-    if (!widget.embedded) {
-      _loadingIndex = logic.session.currentIndex;
+    if (!widget.embedded &&
+        !logic.isEpisodeLocked(logic.session.currentEpisode)) {
       _loadingVisible = true;
       _loadingRemoved = false;
+      if (kDebugMode) {
+        debugPrint(
+          '[player-entry] phase=loading-shown-once '
+          'index=${logic.session.currentIndex}',
+        );
+      }
     }
   }
 
@@ -352,6 +358,15 @@ class _PlayerPageState extends State<PlayerPage>
         notification.dragDetails != null) {
       _swipeStartedAt = DateTime.now();
       _swipePrewarmCaptured = false;
+      if (!widget.embedded && !_loadingRemoved) {
+        setState(() {
+          _loadingVisible = false;
+          _loadingRemoved = true;
+        });
+        if (kDebugMode) {
+          debugPrint('[player-entry] phase=loading-dismissed-on-swipe');
+        }
+      }
     } else if (notification is ScrollUpdateNotification &&
         !_swipePrewarmCaptured &&
         notification.dragDetails != null) {
@@ -544,14 +559,12 @@ class _PlayerPageState extends State<PlayerPage>
     final interactions = context.watch<InteractionController>();
     final l10n = AppLocalizations.of(context)!;
     final indices = logic.visibleIndices;
-    final currentIndex = logic.session.currentIndex;
-    if (!widget.embedded && _loadingIndex != currentIndex) {
-      _loadingIndex = currentIndex;
-      _videoReadyIndex = null;
-      _loadingVisible = true;
-      _loadingRemoved = false;
-      _loadingFadeScheduled = false;
-    }
+    final activePort = logic.session.active;
+    final activeVideo = activePort is VideoPlayerPort ? activePort : null;
+    final canWaitForVideoFrame =
+        activeVideo != null &&
+        activeVideo.controller.value.isInitialized &&
+        !activeVideo.controller.value.hasError;
     final entryUnavailable =
         logic.ticketError != null ||
         logic.blockedEpisodeId != null ||
@@ -560,10 +573,10 @@ class _PlayerPageState extends State<PlayerPage>
     if (!widget.embedded &&
         !_loadingRemoved &&
         !_loadingFadeScheduled &&
-        entryUnavailable) {
+        entryUnavailable &&
+        !canWaitForVideoFrame) {
       _scheduleLoadingFade('entry-unavailable');
     }
-    final activePort = logic.session.active;
     if (!widget.embedded &&
         !_loadingRemoved &&
         !_loadingFadeScheduled &&
@@ -631,8 +644,17 @@ class _PlayerPageState extends State<PlayerPage>
               pageController: _pageController,
               slots: _renderSlots(indices),
               onCurrentVideoVisible: _handleCurrentVideoVisible,
-              showNeighbors: widget.embedded || _loadingRemoved,
             ),
+            if (!widget.embedded && !_loadingRemoved)
+              Center(
+                child: IgnorePointer(
+                  key: const Key('player-entry-loading-overlay'),
+                  child: PlayerLoadingOverlay(
+                    opacity: _loadingVisible ? 1 : 0,
+                    onFadeEnd: _handleLoadingFadeEnd,
+                  ),
+                ),
+              ),
             pageLayer,
           ],
         );
@@ -675,14 +697,6 @@ class _PlayerPageState extends State<PlayerPage>
               ),
             ),
           ),
-        if (!widget.embedded && !_loadingRemoved)
-          Positioned.fill(
-            child: PlayerLoadingOverlay(
-              key: ValueKey('player-loading-${_loadingIndex ?? currentIndex}'),
-              opacity: _loadingVisible ? 1 : 0,
-              onFadeEnd: _handleLoadingFadeEnd,
-            ),
-          ),
       ],
     );
     final player = AnnotatedRegion<SystemUiOverlayStyle>(
@@ -717,7 +731,7 @@ class _PlayerPageState extends State<PlayerPage>
   }
 
   void _handleCurrentVideoVisible(int? index) {
-    if (!mounted) return;
+    if (!mounted || _loadingRemoved) return;
     final currentIndex = logic.session.currentIndex;
     if (index == null ||
         index != currentIndex ||
@@ -733,6 +747,14 @@ class _PlayerPageState extends State<PlayerPage>
     }
     WidgetsBinding.instance.addPostFrameCallback((_) {
       WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (!mounted ||
+            _loadingRemoved ||
+            index != logic.session.currentIndex) {
+          return;
+        }
+        if (kDebugMode) {
+          debugPrint('[player-entry] phase=video-frame-painted index=$index');
+        }
         _startLoadingFade(currentIndex);
       });
     });
@@ -938,11 +960,20 @@ class _PlayerPageState extends State<PlayerPage>
     if (selected && videoReady) _logSwipeReveal();
     final ready = !locked && (videoReady || port != null);
     final theater = logic.pip || logic.pipPreparing;
+    final entryLoading = !widget.embedded && !_loadingRemoved;
+    if (kDebugMode && entryLoading && selected && !_loggedLoadingUiVisible) {
+      _loggedLoadingUiVisible = true;
+      debugPrint(
+        '[player-entry] phase=loading-ui-visible '
+        'index=$index top=1 rail=1 progress=1',
+      );
+    }
 
     return Stack(
       fit: StackFit.expand,
       children: [
         if (selected &&
+            !entryLoading &&
             !locked &&
             !theater &&
             !ready &&
@@ -962,7 +993,7 @@ class _PlayerPageState extends State<PlayerPage>
             ),
           ),
         // 票据三态之一：起播前正在向后端要签名地址
-        if (selected && !theater && logic.ticketLoading)
+        if (selected && !entryLoading && !theater && logic.ticketLoading)
           const Center(
             child: SizedBox.square(
               dimension: _playerLoadingSize,