style: 增加推荐剧单渐变背景

lib/core/theme/app_colors.dart

@@ -101,6 +101,7 @@ abstract final class AppColors {
   static const mineIconSupport = Color(0xFFA78BFA);
   static const mineIconLanguage = Color(0xFF22D3EE);
   static const mineIconSettings = Color(0xFFA1A1AA);
+  static const recommendPlaylistGlow = Color(0x26FF6B2C);
 
   /// 次级文字与列表 chevron。
   static const textPrimary = Color(0xFFFFFFFF);