fix(home): 调整封面播放量位置

lib/core/theme/app_colors.dart

@@ -159,6 +159,8 @@ abstract final class AppColors {
 
   /// 播放器控件胶囊与圆形底色。
   static const playerOverlayPill = Color(0xB3000000);
+  static const cardBottomScrimStart = Color(0x00000000);
+  static const cardBottomScrimEnd = Color(0x40000000);
 
   /// 进度条未激活轨道。
   static const inactiveTrack = Color(0x24FFFFFF);

lib/core/theme/app_dimens.dart

@@ -89,6 +89,8 @@ abstract final class AppDimens {
   static const double cardViewsIcon = 11;
   static const double cardPlayCountFont = 12;
   static const double cardPlayCountGap = 2;
+  static const double cardPlayCountBottom = 6;
+  static const double cardPlayCountScrimHeight = 32;
   static const double cardGenreRibbonHeight = 20;
   static const double cardGenreRibbonRadius = 10;
   static const double cardGenreRibbonLeftInset = 8;