fix(flutter): 播放页改为透明叠层

lib/pages/player/player_view.dart

@@ -20,7 +20,6 @@ import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/auth_gate.dart';
 import '../../core/widgets/download_action.dart';
-import '../../core/widgets/remote_image.dart';
 import '../../l10n/app_localizations.dart';
 import '../interaction/widgets/report_dialog.dart';
 import 'player_binding.dart';
@@ -168,7 +167,11 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
         data: AppTheme.light(),
         child: widget.embedded
             ? content
-            : Scaffold(backgroundColor: AppColors.ink, body: content),
+            : Scaffold(
+                key: const Key('player-scaffold'),
+                backgroundColor: Colors.transparent,
+                body: content,
+              ),
       ),
     );
   }
@@ -215,17 +218,11 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
     return Stack(
       fit: StackFit.expand,
       children: [
-        ColoredBox(
-          key: const Key('player-background'),
-          color: AppColors.playerBackground,
-          child: widget.homeMode
-              ? null
-              : RemoteImage(
-                  drama.posterUrl,
-                  fit: BoxFit.cover,
-                  showFallbackIcon: true,
-                ),
-        ),
+        if (!ready)
+          const ColoredBox(
+            key: Key('player-fallback-background'),
+            color: Colors.black,
+          ),
         ?video,
         if (widget.homeMode && _chromeVisible && !logic.chromeHidden)
           Positioned.fill(