feat(media): 图片占位改为纯色块并去掉扫光

lib/core/widgets/image_placeholder_shimmer.dart

@@ -1,86 +0,0 @@
-// Author: fruit.com.cn
-// 职责：给默认图片加载占位叠加可暂停、局部重绘的轻量扫光。
-import 'package:flutter/material.dart';
-
-const _sweepDuration = Duration(milliseconds: 1400);
-const double _bandWidthRatio = 0.65;
-const _highlight = Color(0x12FFFFFF);
-const _clear = Color(0x00FFFFFF);
-
-/// 只用于等待真实图片的占位；减少动画或页面离屏时不运行扫光。
-class ImagePlaceholderShimmer extends StatefulWidget {
-  /// 在 [child] 上方绘制不影响布局与点击区域的扫光。
-  const ImagePlaceholderShimmer({super.key, required this.child});
-
-  final Widget child;
-
-  @override
-  State<ImagePlaceholderShimmer> createState() =>
-      _ImagePlaceholderShimmerState();
-}
-
-class _ImagePlaceholderShimmerState extends State<ImagePlaceholderShimmer>
-    with SingleTickerProviderStateMixin {
-  late final AnimationController _controller = AnimationController(
-    vsync: this,
-    duration: _sweepDuration,
-  );
-  bool _active = false;
-
-  @override
-  void didChangeDependencies() {
-    super.didChangeDependencies();
-    _active =
-        TickerMode.valuesOf(context).enabled &&
-        !MediaQuery.disableAnimationsOf(context);
-    if (_active) {
-      _controller.repeat();
-    } else {
-      _controller.stop();
-    }
-  }
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    if (!_active) return widget.child;
-    return RepaintBoundary(
-      child: ClipRect(
-        child: CustomPaint(
-          foregroundPainter: _SweepPainter(_controller),
-          child: widget.child,
-        ),
-      ),
-    );
-  }
-}
-
-class _SweepPainter extends CustomPainter {
-  _SweepPainter(this.progress) : super(repaint: progress);
-
-  final Animation<double> progress;
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    if (size.isEmpty) return;
-    final bandWidth = size.width * _bandWidthRatio;
-    final left = -bandWidth + (size.width + bandWidth) * progress.value;
-    final rect = Rect.fromLTWH(left, 0, bandWidth, size.height);
-    final paint = Paint()
-      ..shader = const LinearGradient(
-        begin: Alignment.topLeft,
-        end: Alignment.bottomRight,
-        colors: [_clear, _highlight, _clear],
-      ).createShader(rect);
-    canvas.drawRect(rect, paint);
-  }
-
-  @override
-  bool shouldRepaint(covariant _SweepPainter oldDelegate) =>
-      oldDelegate.progress != progress;
-}

lib/core/widgets/remote_image.dart

@@ -1,10 +1,10 @@
 // Author: fruit.com.cn
+// 职责：统一网络图片入口，补服务地址，并在加载中/失败时显示纯色占位块。
 
 import 'package:flutter/material.dart';
 
 import '../config/app_config.dart';
 import '../theme/app_colors.dart';
-import 'image_placeholder_shimmer.dart';
 
 const int _minImageDecodePixels = 96;
 const int _maxImageDecodePixels = 2048;
@@ -32,8 +32,6 @@ class RemoteImage extends StatelessWidget {
     this.width,
     this.height,
     this.fit = BoxFit.cover,
-    this.showFallbackIcon = false,
-    this.fallbackIconKey,
     this.fallbackAspectRatio,
     this.fallbackColor = AppColors.raised,
     this.fallbackWidget,
@@ -45,12 +43,10 @@ class RemoteImage extends StatelessWidget {
   final double? width;
   final double? height;
   final BoxFit fit;
-  final bool showFallbackIcon;
-  final Key? fallbackIconKey;
   final double? fallbackAspectRatio;
   final Color fallbackColor;
 
-  /// 自定义兜底：地址为空、加载中、加载失败时都显示它（优先于 [fallbackColor]）。
+  /// 自定义占位：地址为空、加载中、加载失败时都显示它（优先于 [fallbackColor]）。
   final Widget? fallbackWidget;
   final int? decodeWidth;
   final int? decodeHeight;
@@ -58,7 +54,7 @@ class RemoteImage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final url = AppConfig.mediaUrl(path);
-    if (url.isEmpty) return _fallback(brand: showFallbackIcon);
+    if (url.isEmpty) return _fallback();
     return LayoutBuilder(
       builder: (context, constraints) {
         final pixelRatio = MediaQuery.devicePixelRatioOf(context);
@@ -100,51 +96,23 @@ class RemoteImage extends StatelessWidget {
               ?.clamp(_minImageDecodePixels, _maxImageDecodePixels)
               .toInt(),
           gaplessPlayback: true,
-          errorBuilder: (_, _, _) => _fallback(brand: showFallbackIcon),
+          errorBuilder: (_, _, _) => _fallback(),
           frameBuilder: (context, child, frame, wasSynchronouslyLoaded) {
             if (wasSynchronouslyLoaded || frame != null) return child;
-            return _loadingFallback();
+            return _fallback();
           },
         );
       },
     );
   }
 
-  Widget _loadingFallback() {
+  Widget _fallback() {
     final custom = fallbackWidget;
-    if (custom != null) return custom;
-    return ImagePlaceholderShimmer(child: _fallback(brand: showFallbackIcon));
-  }
-
-  Widget _fallback({required bool brand}) {
-    final custom = fallbackWidget;
-    if (custom != null) return custom;
-    final mark = brand
-        ? LayoutBuilder(
-            builder: (context, constraints) {
-              final width = constraints.maxWidth.isFinite
-                  ? constraints.maxWidth
-                  : 120.0;
-              return Center(
-                child: Image.asset(
-                  'assets/icon/splash_logo.png',
-                  key: fallbackIconKey,
-                  width: width * 0.72,
-                  fit: BoxFit.contain,
-                ),
-              );
-            },
-          )
-        : null;
-    final fallback = Container(
-      width: width,
-      height: height,
-      color: brand ? AppColors.mediaBlack : fallbackColor,
-      alignment: Alignment.center,
-      child: mark,
-    );
+    final content = custom != null
+        ? SizedBox(width: width, height: height, child: custom)
+        : Container(width: width, height: height, color: fallbackColor);
     final ratio = fallbackAspectRatio;
-    if (ratio == null) return fallback;
-    return AspectRatio(aspectRatio: ratio, child: fallback);
+    if (ratio == null) return content;
+    return AspectRatio(aspectRatio: ratio, child: content);
   }
 }

lib/pages/discover/widgets/feed_banner_carousel.dart

@@ -176,7 +176,7 @@ class _FeedBannerCarouselState extends State<FeedBannerCarousel> {
       child: Stack(
         fit: StackFit.expand,
         children: [
-          RemoteImage(banner.imageUrl, showFallbackIcon: true),
+          RemoteImage(banner.imageUrl),
           DecoratedBox(
             decoration: BoxDecoration(
               gradient: LinearGradient(

lib/pages/discover/widgets/search_result_card.dart

@@ -37,7 +37,6 @@ class SearchResultCard extends StatelessWidget {
                     RemoteImage(
                       drama.posterUrl,
                       fit: BoxFit.cover,
-                      showFallbackIcon: true,
                       fallbackColor: AppColors.contentSurface,
                     ),
                     const Positioned(
@@ -60,7 +59,9 @@ class SearchResultCard extends StatelessWidget {
             ),
             const SizedBox(height: AppDimens.searchResultTitleGap),
             Text(
-              drama.localizedTitle(Localizations.localeOf(context).languageCode),
+              drama.localizedTitle(
+                Localizations.localeOf(context).languageCode,
+              ),
               key: Key('search-result-title-${drama.id}'),
               maxLines: 2,
               overflow: TextOverflow.ellipsis,
@@ -93,7 +94,9 @@ class SearchResultCard extends StatelessWidget {
   }
 
   List<String> _tags(BuildContext context) {
-    final localized = drama.localizedTypeLabels(Localizations.localeOf(context).languageCode);
+    final localized = drama.localizedTypeLabels(
+      Localizations.localeOf(context).languageCode,
+    );
     if (localized.isNotEmpty) return localized.take(3).toList(growable: false);
     final seen = <String>{};
     return [drama.genre, drama.category]

lib/pages/drama_detail/widgets/drama_detail_header.dart

@@ -126,7 +126,6 @@ class DramaDetailHeader extends StatelessWidget {
             child: RemoteImage(
               drama.posterUrl,
               fit: BoxFit.cover,
-              showFallbackIcon: true,
               fallbackAspectRatio: 3 / 4,
             ),
           ),

lib/pages/filter/widgets/filter_result_card.dart

@@ -53,7 +53,6 @@ class FilterResultCard extends StatelessWidget {
                   RemoteImage(
                     drama.posterUrl,
                     fit: BoxFit.cover,
-                    showFallbackIcon: true,
                     fallbackAspectRatio: 3 / 4,
                   ),
                   if (drama.isHot)

lib/pages/following/following_grid_card.dart

@@ -64,7 +64,6 @@ class FollowingGridCard extends StatelessWidget {
                     child: RemoteImage(
                       posterUrl,
                       fit: BoxFit.cover,
-                      showFallbackIcon: true,
                       fallbackColor: AppColors.contentSurface,
                     ),
                   ),

lib/pages/following/following_history_card.dart

@@ -75,7 +75,6 @@ class FollowingHistoryCard extends StatelessWidget {
               child: RemoteImage(
                 posterUrl,
                 fit: BoxFit.cover,
-                showFallbackIcon: true,
                 fallbackColor: AppColors.contentSurface,
               ),
             ),

lib/pages/following/widgets/continue_watching_banner.dart

@@ -40,7 +40,6 @@ class ContinueWatchingBanner extends StatelessWidget {
             RemoteImage(
               record.displayLandscapeCover,
               fit: BoxFit.cover,
-              showFallbackIcon: true,
               fallbackColor: AppColors.contentSurface,
             ),
             const DecoratedBox(

lib/pages/home/widgets/home_drama_grid.dart

@@ -122,7 +122,6 @@ class HomeDramaCard extends StatelessWidget {
             drama.posterUrl,
             width: double.infinity,
             fit: BoxFit.fitWidth,
-            showFallbackIcon: true,
             fallbackAspectRatio: _coverAspectRatio,
           ),
           Positioned(top: 8, left: 8, child: _tagBadge()),
@@ -226,7 +225,9 @@ class HomeDramaCard extends StatelessWidget {
   }
 
   Widget _genre(BuildContext context) {
-    final labels = drama.localizedTypeLabels(Localizations.localeOf(context).languageCode);
+    final labels = drama.localizedTypeLabels(
+      Localizations.localeOf(context).languageCode,
+    );
     final genre = labels.isEmpty
         ? (drama.genre.isEmpty ? drama.category : drama.genre)
         : labels.join(' / ');

lib/pages/home/widgets/home_feed_card.dart

@@ -12,11 +12,7 @@ import '../../../core/widgets/remote_image.dart';
 final RegExp _tagSplitter = RegExp(r'[,/、·]');
 
 class HomeFeedCard extends StatelessWidget {
-  const HomeFeedCard({
-    super.key,
-    required this.drama,
-    required this.onTap,
-  });
+  const HomeFeedCard({super.key, required this.drama, required this.onTap});
 
   final Drama drama;
   final VoidCallback onTap;
@@ -44,7 +40,9 @@ class HomeFeedCard extends StatelessWidget {
                   mainAxisAlignment: MainAxisAlignment.start,
                   children: [
                     Text(
-                      drama.localizedTitle(Localizations.localeOf(context).languageCode),
+                      drama.localizedTitle(
+                        Localizations.localeOf(context).languageCode,
+                      ),
                       key: Key('home-feed-title-${drama.id}'),
                       maxLines: 2,
                       overflow: TextOverflow.ellipsis,
@@ -69,7 +67,9 @@ class HomeFeedCard extends StatelessWidget {
   }
 
   Widget _cover(BuildContext context) {
-    final label = drama.localizedTag(Localizations.localeOf(context).languageCode);
+    final label = drama.localizedTag(
+      Localizations.localeOf(context).languageCode,
+    );
     return ClipRRect(
       key: Key('home-feed-cover-clip-${drama.id}'),
       borderRadius: BorderRadius.circular(AppDimens.cardCoverRadius),
@@ -82,7 +82,6 @@ class HomeFeedCard extends StatelessWidget {
               drama.posterUrl,
               key: Key('home-feed-cover-${drama.id}'),
               fit: BoxFit.cover,
-              showFallbackIcon: true,
               fallbackColor: AppColors.contentSurface,
             ),
             if (label.isNotEmpty)
@@ -133,7 +132,9 @@ class HomeFeedCard extends StatelessWidget {
   }
 
   List<String> _cardTags(BuildContext context) {
-    final localized = drama.localizedTypeLabels(Localizations.localeOf(context).languageCode);
+    final localized = drama.localizedTypeLabels(
+      Localizations.localeOf(context).languageCode,
+    );
     if (localized.isNotEmpty) return localized.take(3).toList(growable: false);
     final seen = <String>{};
     return [drama.genre, drama.category]

lib/pages/mine/widgets/mine_continue_watching.dart

@@ -128,7 +128,6 @@ class MineContinueWatching extends StatelessWidget {
                       child: RemoteImage(
                         record.dramaCover ?? '',
                         fit: BoxFit.cover,
-                        showFallbackIcon: true,
                         fallbackColor: AppColors.contentSurface,
                       ),
                     ),

lib/pages/new_releases/new_releases_page.dart

@@ -276,7 +276,6 @@ class _NewReleasesPageState extends State<NewReleasesPage> {
               RemoteImage(
                 drama.posterUrl,
                 fit: BoxFit.cover,
-                showFallbackIcon: true,
                 fallbackAspectRatio: 16 / 9,
               ),
               const DecoratedBox(
@@ -448,7 +447,6 @@ class _NewReleasesPageState extends State<NewReleasesPage> {
                     RemoteImage(
                       drama.posterUrl,
                       fit: BoxFit.cover,
-                      showFallbackIcon: true,
                       fallbackAspectRatio: 3 / 4,
                     ),
                     Positioned(

lib/pages/player/widgets/drama_info_sheet.dart

@@ -255,11 +255,7 @@ class _DramaInfoSheetState extends State<DramaInfoSheet> {
             width: _posterWidth,
             child: AspectRatio(
               aspectRatio: 3 / 4,
-              child: RemoteImage(
-                drama.posterUrl,
-                fit: BoxFit.cover,
-                showFallbackIcon: true,
-              ),
+              child: RemoteImage(drama.posterUrl, fit: BoxFit.cover),
             ),
           ),
         ),
@@ -466,11 +462,7 @@ class _DramaInfoSheetState extends State<DramaInfoSheet> {
                     width: _relatedWidth,
                     child: AspectRatio(
                       aspectRatio: 3 / 4,
-                      child: RemoteImage(
-                        drama.posterUrl,
-                        fit: BoxFit.cover,
-                        showFallbackIcon: true,
-                      ),
+                      child: RemoteImage(drama.posterUrl, fit: BoxFit.cover),
                     ),
                   ),
                 ),

lib/pages/recommend/widgets/home_hero_carousel.dart

@@ -187,7 +187,6 @@ class _HomeHeroCarouselState extends State<HomeHeroCarousel> {
         RemoteImage(
           banner.imageUrl,
           fit: BoxFit.cover,
-          showFallbackIcon: true,
           fallbackColor: AppColors.contentSurface,
         ),
         const DecoratedBox(
@@ -210,10 +209,7 @@ class _HomeHeroCarouselState extends State<HomeHeroCarousel> {
             left: 28,
             right: 28,
             bottom: _copyBottomInset,
-            child: _HeroCopy(
-              key: Key('home-hero-copy-$index'),
-              drama: drama,
-            ),
+            child: _HeroCopy(key: Key('home-hero-copy-$index'), drama: drama),
           ),
         if (drama != null)
           Positioned.fill(

lib/pages/recommend/widgets/home_recommend_content.dart

@@ -97,7 +97,6 @@ class HomePosterCard extends StatelessWidget {
                   RemoteImage(
                     drama.posterUrl,
                     fit: BoxFit.cover,
-                    showFallbackIcon: true,
                     fallbackColor: AppColors.contentSurface,
                   ),
                   if (tagLabel.isNotEmpty)
@@ -189,7 +188,6 @@ class HomeEditorPickBanner extends StatelessWidget {
               RemoteImage(
                 drama.posterUrl,
                 fit: BoxFit.cover,
-                showFallbackIcon: true,
                 fallbackColor: AppColors.contentSurface,
               ),
               const DecoratedBox(

lib/pages/recommend/widgets/playlist_detail_page.dart

@@ -310,7 +310,6 @@ class _PlaylistCollage extends StatelessWidget {
       child: RemoteImage(
         drama.posterUrl,
         fit: BoxFit.cover,
-        showFallbackIcon: true,
         fallbackColor: _filmBody,
       ),
     );

lib/pages/recommend/widgets/recommend_section_card.dart

@@ -25,7 +25,9 @@ class RecommendSectionCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final tagLabel = drama.localizedTag(Localizations.localeOf(context).languageCode);
+    final tagLabel = drama.localizedTag(
+      Localizations.localeOf(context).languageCode,
+    );
     return SizedBox(
       width: AppDimens.recommendCardWidth,
       child: InkWell(
@@ -47,7 +49,6 @@ class RecommendSectionCard extends StatelessWidget {
                     RemoteImage(
                       drama.posterUrl,
                       fit: BoxFit.cover,
-                      showFallbackIcon: true,
                       fallbackColor: AppColors.contentSurface,
                     ),
                     if (tagLabel.isNotEmpty)
@@ -80,7 +81,9 @@ class RecommendSectionCard extends StatelessWidget {
             ),
             const SizedBox(height: AppDimens.cardCoverTitleGap),
             Text(
-              drama.localizedTitle(Localizations.localeOf(context).languageCode),
+              drama.localizedTitle(
+                Localizations.localeOf(context).languageCode,
+              ),
               key: Key('recommend-title-$sectionKey-${drama.id}'),
               maxLines: 2,
               overflow: TextOverflow.ellipsis,
@@ -116,7 +119,9 @@ class RecommendSectionCard extends StatelessWidget {
   }
 
   List<String> _cardTags(BuildContext context) {
-    final localized = drama.localizedTypeLabels(Localizations.localeOf(context).languageCode);
+    final localized = drama.localizedTypeLabels(
+      Localizations.localeOf(context).languageCode,
+    );
     if (localized.isNotEmpty) return localized.take(3).toList(growable: false);
     final seen = <String>{};
     return [drama.genre, drama.category]

lib/pages/watch_records/widgets/watch_record_card.dart

@@ -70,9 +70,11 @@ class WatchRecordCard extends StatelessWidget {
                   key: ValueKey('watch-record-cover-${record.dramaId}'),
                   width: _coverWidth,
                   height: _coverHeight,
-                  showFallbackIcon: true,
-                  fallbackIconKey: ValueKey(
-                    'watch-record-cover-placeholder-${record.dramaId}',
+                  fallbackWidget: ColoredBox(
+                    key: ValueKey(
+                      'watch-record-cover-placeholder-${record.dramaId}',
+                    ),
+                    color: AppColors.raised,
                   ),
                 ),
               ),

test/core/image_placeholder_shimmer_test.dart

@@ -1,114 +0,0 @@
-// Author: fruit.com.cn
-// 职责：验证图片占位扫光生命周期及默认兜底接入。
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-import 'package:fruitshorts/core/widgets/image_placeholder_shimmer.dart';
-import 'package:fruitshorts/core/widgets/remote_image.dart';
-
-const _frame = Duration(milliseconds: 350);
-const double _width = 120;
-const double _height = 160;
-const _size = Size(_width, _height);
-
-Widget _placeholder({bool reduceMotion = false, bool active = true}) {
-  return MaterialApp(
-    home: MediaQuery(
-      data: MediaQueryData(disableAnimations: reduceMotion),
-      child: TickerMode(
-        enabled: active,
-        child: const Center(
-          child: SizedBox(
-            width: _width,
-            height: _height,
-            child: ImagePlaceholderShimmer(
-              child: ColoredBox(color: Colors.black),
-            ),
-          ),
-        ),
-      ),
-    ),
-  );
-}
-
-void main() {
-  testWidgets('should_paint_clipped_sweep_when_placeholder_is_loading', (
-    tester,
-  ) async {
-    await tester.pumpWidget(_placeholder());
-    final shimmer = find.byType(ImagePlaceholderShimmer);
-    final paintFinder = find.descendant(
-      of: shimmer,
-      matching: find.byType(CustomPaint),
-    );
-    final paint = tester.widget<CustomPaint>(paintFinder);
-    var repaints = 0;
-    paint.foregroundPainter!.addListener(() => repaints++);
-    await tester.pump(_frame);
-    expect(repaints, greaterThan(0));
-    expect(tester.getSize(shimmer), _size);
-    expect(
-      find.descendant(of: shimmer, matching: find.byType(ClipRect)),
-      findsOneWidget,
-    );
-    await tester.pumpWidget(const SizedBox.shrink());
-    await tester.pump(_frame);
-    expect(tester.binding.hasScheduledFrame, isFalse);
-  });
-
-  testWidgets('should_pause_sweep_when_motion_is_disabled_or_page_is_hidden', (
-    tester,
-  ) async {
-    await tester.pumpWidget(_placeholder());
-    await tester.pump(_frame);
-    await tester.pumpWidget(_placeholder(reduceMotion: true));
-    await tester.pump(_frame);
-    expect(tester.binding.hasScheduledFrame, isFalse);
-    await tester.pumpWidget(_placeholder(active: false));
-    await tester.pump(_frame);
-    expect(tester.binding.hasScheduledFrame, isFalse);
-    await tester.pumpWidget(_placeholder());
-    await tester.pump(_frame);
-    expect(tester.binding.hasScheduledFrame, isTrue);
-    await tester.pumpWidget(const SizedBox.shrink());
-  });
-
-  testWidgets(
-    'should_sweep_only_default_loading_fallback_when_image_is_pending',
-    (tester) async {
-      await tester.pumpWidget(
-        const MaterialApp(
-          home: SizedBox(
-            width: _width,
-            height: _height,
-            child: RemoteImage('/files/pending-cover.jpg'),
-          ),
-        ),
-      );
-      final image = tester.widget<Image>(find.byType(Image));
-      final context = tester.element(find.byType(RemoteImage));
-      const loaded = SizedBox(key: Key('loaded'));
-      expect(
-        image.frameBuilder!(context, loaded, null, false),
-        isA<ImagePlaceholderShimmer>(),
-      );
-      expect(image.frameBuilder!(context, loaded, 0, false), same(loaded));
-      expect(
-        image.errorBuilder!(context, Exception('failed'), null),
-        isNot(isA<ImagePlaceholderShimmer>()),
-      );
-      await tester.pumpWidget(const MaterialApp(home: RemoteImage('')));
-      expect(find.byType(ImagePlaceholderShimmer), findsNothing);
-      await tester.pumpWidget(
-        const MaterialApp(
-          home: RemoteImage(
-            '/files/custom-cover.jpg',
-            fallbackWidget: SizedBox(key: Key('custom')),
-          ),
-        ),
-      );
-      expect(find.byKey(const Key('custom')), findsOneWidget);
-      expect(find.byType(ImagePlaceholderShimmer), findsNothing);
-      await tester.pumpWidget(const SizedBox.shrink());
-    },
-  );
-}