style(theme): 客户端切换深色视觉风格

lib/pages/discover/widgets/feed_banner_carousel.dart

@@ -183,8 +183,8 @@ class _FeedBannerCarouselState extends State<FeedBannerCarousel> {
                 begin: Alignment.topCenter,
                 end: Alignment.bottomCenter,
                 colors: drama == null
-                    ? const [Color(0x00000000), Color(0x8A0B0C10)]
-                    : const [Color(0x00000000), Color(0xE6000000)],
+                    ? const [AppColors.transparent, AppColors.bannerScrimMid]
+                    : const [AppColors.transparent, AppColors.bannerScrimEnd],
               ),
             ),
           ),
@@ -232,7 +232,7 @@ class _FeedBannerCarouselState extends State<FeedBannerCarousel> {
       child: dramaId == null
           ? card
           : Material(
-              color: Colors.transparent,
+              color: AppColors.transparent,
               borderRadius: borderRadius,
               clipBehavior: Clip.antiAlias,
               child: InkWell(