feat(ui): 更新品牌启动页与选集交互

lib/pages/drama_detail/drama_detail_view.dart

@@ -79,13 +79,13 @@ class _DramaDetailPageState extends State<DramaDetailPage> {
     final l10n = AppLocalizations.of(context)!;
     if (logic.loading) {
       return const Scaffold(
-        backgroundColor: Color(0xFF111111),
+        backgroundColor: AppColors.ink,
         body: Center(child: CircularProgressIndicator()),
       );
     }
     if (logic.failed) {
       return Scaffold(
-        backgroundColor: const Color(0xFF111111),
+        backgroundColor: AppColors.ink,
         body: Center(
           child: Padding(
             padding: const EdgeInsets.symmetric(horizontal: 32),
@@ -109,9 +109,9 @@ class _DramaDetailPageState extends State<DramaDetailPage> {
     if (drama.episodes.isEmpty) {
       // 空态：详情拿到了但一集都没有（还没上传/审核中），不能白屏
       return Scaffold(
-        backgroundColor: const Color(0xFF111111),
+        backgroundColor: AppColors.ink,
         appBar: AppBar(
-          backgroundColor: const Color(0xFF111111),
+          backgroundColor: AppColors.ink,
           foregroundColor: Colors.white,
           title: Text(localizedDramaTitle(l10n, drama)),
         ),
@@ -126,12 +126,13 @@ class _DramaDetailPageState extends State<DramaDetailPage> {
       );
     }
     return Scaffold(
+      backgroundColor: AppColors.ink,
       body: CustomScrollView(
         slivers: [
           SliverAppBar(
             expandedHeight: 300,
             pinned: true,
-            backgroundColor: const Color(0xFF111111),
+            backgroundColor: AppColors.ink,
             foregroundColor: Colors.white,
             actions: [
               _reportAction(context, l10n),