feat(media): 图片占位改为纯色块并去掉扫光

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]