feat(app): 播放器增加清晰度档位入口

lib/pages/player/player_view.dart

@@ -28,6 +28,7 @@ import 'player_logic.dart';
 import 'widgets/home_feed_overlay.dart';
 import 'widgets/exit_clear_screen_button.dart';
 import 'widgets/player_center_toggle.dart';
+import 'widgets/quality_sheet.dart';
 import 'widgets/player_featured_comment.dart';
 import 'widgets/seek_progress_bar.dart';
 import '../../core/data/repositories/watch_history_repository.dart';
@@ -402,6 +403,8 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
             playing: logic.session.userWantsPlay,
             playbackSpeed: _playbackSpeed,
             onSpeedTap: () => unawaited(_openSpeedSheet(context)),
+            qualities: logic.qualities,
+            onQualityTap: () => unawaited(_openQualitySheet(context)),
             controlsVisible: _chromeVisible,
             onClear: () => setState(() => _chromeVisible = false),
             onExitClear: () => setState(() => _chromeVisible = true),
@@ -500,6 +503,15 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
     await logic.setPlaybackSpeed(selected);
   }
 
+  Future<void> _openQualitySheet(BuildContext context) async {
+    await showModalBottomSheet<void>(
+      context: context,
+      backgroundColor: AppColors.card,
+      showDragHandle: true,
+      builder: (_) => QualitySheet(qualities: logic.qualities),
+    );
+  }
+
   Future<void> _unlockEpisode(BuildContext context, int index) async {
     if (!await ensureSignedIn(context)) return;
     if (!context.mounted) return;
@@ -693,6 +705,8 @@ class _PlaybackOverlay extends StatefulWidget {
     required this.playing,
     required this.playbackSpeed,
     required this.onSpeedTap,
+    required this.qualities,
+    required this.onQualityTap,
     required this.controlsVisible,
     required this.onTogglePlay,
     required this.onClear,
@@ -720,6 +734,8 @@ class _PlaybackOverlay extends StatefulWidget {
   final bool playing;
   final double playbackSpeed;
   final VoidCallback onSpeedTap;
+  final List<String> qualities;
+  final VoidCallback onQualityTap;
   final bool controlsVisible;
   final VoidCallback onTogglePlay;
   final VoidCallback onClear;
@@ -953,7 +969,29 @@ class _PlaybackOverlayState extends State<_PlaybackOverlay> {
                 });
               },
             ),
-            ListTile(
+            if (widget.qualities.isNotEmpty)
+              ListTile(
+                key: const Key('player-more-quality'),
+                leading: const Icon(
+                  Icons.high_quality_rounded,
+                  color: AppColors.secondary,
+                ),
+                title: Text(widget.l10n.playbackQuality),
+                trailing: Text(
+                  widget.qualities.contains(QualitySheet.autoQuality)
+                      ? widget.l10n.qualityAuto
+                      : widget.qualities.first,
+                  style: const TextStyle(
+                    color: AppColors.blue,
+                    fontSize: 12,
+                    fontWeight: FontWeight.w600,
+                  ),
+                ),
+                onTap: () {
+                  Navigator.pop(sheetContext);
+                  widget.onQualityTap();
+                },
+              ),            ListTile(
               key: const Key('player-more-download'),
               leading: const Icon(
                 Icons.download_outlined,