fix(player): 修复竖滑上一集不自动播放

lib/pages/player/player_logic.dart

@@ -969,7 +969,7 @@ class PlayerLogic extends ChangeNotifier {
         !isMounted()) {
       return;
     }
-    if (!ready && ticketError != null) return;
+    if (!ready) return;
     await _selectVisible(index);
   }
 

lib/pages/player/player_view.dart

@@ -2,6 +2,7 @@
 
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
@@ -124,6 +125,8 @@ class _PlayerPageState extends State<PlayerPage>
   double? _speedBeforeBoost;
   bool? _chromeBeforeBoost;
   DateTime? _lastDoubleTapAt;
+  DateTime? _swipeStartedAt;
+  bool _swipePrewarmCaptured = false;
 
   /// 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。
   final Map<String, int> _favoriteDelta = {};
@@ -308,6 +311,34 @@ class _PlayerPageState extends State<PlayerPage>
     unawaited(logic.setPlaybackSpeed(speed));
   }
 
+  bool _handlePageScroll(ScrollNotification notification) {
+    if (notification is ScrollStartNotification &&
+        notification.dragDetails != null) {
+      _swipeStartedAt = DateTime.now();
+      _swipePrewarmCaptured = false;
+    } else if (notification is ScrollUpdateNotification &&
+        !_swipePrewarmCaptured &&
+        notification.dragDetails != null) {
+      final delta = notification.scrollDelta ?? 0;
+      if (delta != 0) {
+        _swipePrewarmCaptured = true;
+        logic.session.prewarmNeighbors(forward: delta > 0);
+      }
+    } else if (notification is ScrollEndNotification) {
+      _swipePrewarmCaptured = false;
+    }
+    return false;
+  }
+
+  void _logSwipeReveal() {
+    if (!kDebugMode) return;
+    final startedAt = _swipeStartedAt;
+    if (startedAt == null) return;
+    _swipeStartedAt = null;
+    final elapsed = DateTime.now().difference(startedAt).inMilliseconds;
+    debugPrint('[player] swipe reveal ${elapsed}ms');
+  }
+
   Future<void> _refreshHomeFeed() async {
     final refresh = widget.onRefreshFeed;
     if (refresh == null) return;
@@ -420,25 +451,28 @@ class _PlayerPageState extends State<PlayerPage>
     final content = AnimatedBuilder(
       animation: logic.session,
       builder: (context, _) {
-        final pages = PageView.builder(
-          controller: logic.pages,
-          scrollDirection: Axis.vertical,
-          allowImplicitScrolling: true,
-          physics: widget.onRefreshFeed == null
-              ? null
-              : const FeedRefreshPhysics(),
-          itemCount: indices.length,
-          onPageChanged: (position) {
-            final index = indices[position];
-            widget.onDramaChanged?.call(logic.queue.entryAt(index).drama);
-            unawaited(logic.selectEpisode(index));
-            if (position >= indices.length - 3) {
-              final loadMore = widget.onLoadMore;
-              if (loadMore != null) unawaited(loadMore());
-            }
-          },
-          itemBuilder: (context, position) =>
-              _buildEpisode(context, indices[position], interactions),
+        final pages = NotificationListener<ScrollNotification>(
+          onNotification: _handlePageScroll,
+          child: PageView.builder(
+            controller: logic.pages,
+            scrollDirection: Axis.vertical,
+            allowImplicitScrolling: true,
+            physics: widget.onRefreshFeed == null
+                ? null
+                : const FeedRefreshPhysics(),
+            itemCount: indices.length,
+            onPageChanged: (position) {
+              final index = indices[position];
+              widget.onDramaChanged?.call(logic.queue.entryAt(index).drama);
+              unawaited(logic.selectEpisode(index));
+              if (position >= indices.length - 3) {
+                final loadMore = widget.onLoadMore;
+                if (loadMore != null) unawaited(loadMore());
+              }
+            },
+            itemBuilder: (context, position) =>
+                _buildEpisode(context, indices[position], interactions),
+          ),
         );
         if (widget.onRefreshFeed == null) return pages;
         return FeedPullRefresh(
@@ -550,6 +584,7 @@ class _PlayerPageState extends State<PlayerPage>
     final handoffPort = handoff is VideoPlayerPort ? handoff : null;
     // 测试播放器没有纹理。有播放器但不是视频控制器时视为已就绪，避免加载圈一直转。
     final videoReady = videoPort?.controller.value.isInitialized ?? false;
+    if (selected && videoReady) _logSwipeReveal();
     final ready = videoReady || port != null;
     final theater = logic.pip || logic.pipPreparing;
     final locked = logic.session.isLocked || episode.locked;
@@ -577,7 +612,10 @@ class _PlayerPageState extends State<PlayerPage>
           handoff: handoffPort?.controller,
           videoUrl: videoPort?.controller.dataSource ?? episode.videoUrl,
           theater: theater,
-          openingFrame: playerOpeningFrame(episode.thumbnailsUrl),
+          openingFrame: playerOpeningFrame(
+            episode.thumbnailsUrl,
+            posterUrl: drama.posterUrl,
+          ),
         ),
         if (selected &&
             !theater &&

lib/pages/player/widgets/player_opening_frame.dart

@@ -8,25 +8,33 @@ import 'package:flutter/material.dart';
 import '../../../core/config/app_config.dart';
 import '../../../core/data/services/sprite_thumbnail_asset_loader.dart';
 import '../../../core/data/services/sprite_thumbnail_axis.dart';
+import '../../../core/theme/app_colors.dart';
+import '../../../core/widgets/remote_image.dart';
 import 'scrub_preview_card.dart';
 
-/// 无雪碧图地址时不垫帧，交还给纯黑底。
-Widget? playerOpeningFrame(String? thumbnailsUrl) {
+/// 封面立即可见，雪碧图首帧解码完成后再覆盖封面。
+Widget? playerOpeningFrame(String? thumbnailsUrl, {String? posterUrl}) {
   final url = thumbnailsUrl?.trim() ?? '';
-  if (url.isEmpty) return null;
-  return PlayerOpeningFrame(thumbnailsUrl: url);
+  final poster = posterUrl?.trim() ?? '';
+  if (url.isEmpty && poster.isEmpty) return null;
+  return PlayerOpeningFrame(
+    thumbnailsUrl: url.isEmpty ? null : url,
+    posterUrl: poster.isEmpty ? null : poster,
+  );
 }
 
-/// 解码出视频画面前，用本集雪碧图第一帧垫底。
+/// 视频解码前依次使用封面和雪碧图首帧，最终由父层黑色兜底。
 class PlayerOpeningFrame extends StatefulWidget {
   const PlayerOpeningFrame({
     super.key,
-    required this.thumbnailsUrl,
+    this.thumbnailsUrl,
+    this.posterUrl,
     this.loader,
     this.cache,
   });
 
-  final String thumbnailsUrl;
+  final String? thumbnailsUrl;
+  final String? posterUrl;
   final SpriteThumbnailAssetLoader? loader;
   final OpeningFrameCache? cache;
 
@@ -55,8 +63,10 @@ class _PlayerOpeningFrameState extends State<PlayerOpeningFrame> {
 
   Future<void> _load() async {
     final serial = ++_serial;
+    final thumbnailsUrl = widget.thumbnailsUrl;
+    if (thumbnailsUrl == null) return;
     final frame = await (widget.cache ?? OpeningFrameCache.shared).load(
-      widget.thumbnailsUrl,
+      thumbnailsUrl,
       loader: widget.loader,
     );
     if (!mounted || serial != _serial) return;
@@ -66,11 +76,25 @@ class _PlayerOpeningFrameState extends State<PlayerOpeningFrame> {
   @override
   Widget build(BuildContext context) {
     final frame = _frame;
-    if (frame == null) return const SizedBox.expand();
-    return SpriteCropPreview(
-      key: const Key('player-opening-sprite'),
-      image: frame.image,
-      sourceRect: frame.sourceRect,
+    final posterUrl = widget.posterUrl;
+    return Stack(
+      fit: StackFit.expand,
+      children: [
+        const ColoredBox(color: AppColors.mediaBlack),
+        if (posterUrl != null)
+          RemoteImage(
+            posterUrl,
+            key: const Key('player-opening-poster'),
+            fit: BoxFit.cover,
+            fallbackColor: AppColors.mediaBlack,
+          ),
+        if (frame != null)
+          SpriteCropPreview(
+            key: const Key('player-opening-sprite'),
+            image: frame.image,
+            sourceRect: frame.sourceRect,
+          ),
+      ],
     );
   }
 }