fix(player): 收紧图片与快速切集资源占用

test/player/player_opening_frame_test.dart

@@ -64,6 +64,38 @@ void main() {
     expect(loader.vttCalls, 0);
   });
 
+  testWidgets('should_decode_fullscreen_poster_at_screen_width', (
+    tester,
+  ) async {
+    final service = SpriteThumbnailAxisService(loader: _FakeSpriteLoader());
+    addTearDown(service.dispose);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: MediaQuery(
+          data: const MediaQueryData(devicePixelRatio: 3),
+          child: Center(
+            child: SizedBox(
+              width: 390,
+              height: 844,
+              child: PlayerOpeningFrame(
+                posterUrl: 'https://cdn.test/poster.jpg',
+                thumbnailsUrl: '',
+                spriteSource: service,
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    final image = tester.widget<Image>(
+      find.byKey(const Key('player-opening-poster')),
+    );
+    final provider = image.image as ResizeImage;
+    expect(provider.width, 1170);
+  });
+
   testWidgets('should_return_no_opening_frame_when_thumbnails_is_empty', (
     tester,
   ) async {