feat(flutter): 统一二级页头并恢复新剧暖色

lib/pages/store/store_page.dart

@@ -13,6 +13,7 @@ import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_dimens.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/empty_state.dart';
+import '../../core/widgets/plain_page_scaffold.dart';
 import '../../l10n/app_localizations.dart';
 
 /// 商品货架：金币包与会员档位共用一套真实接口渲染。
@@ -57,20 +58,13 @@ class _StorePageState extends State<StorePage> {
     final isVip = widget.type == StoreController.vipType;
     return Theme(
       data: AppTheme.light(),
-      child: Scaffold(
-        key: const Key('store-page'),
-        backgroundColor: AppColors.ink,
-        appBar: AppBar(
-          backgroundColor: AppColors.ink,
-          foregroundColor: AppColors.onSurface,
-          title: Text(isVip ? l10n.vipTitle : l10n.rechargeTitle),
-        ),
-        body: SafeArea(
-          top: false,
-          child: ListenableBuilder(
-            listenable: controller,
-            builder: (context, _) => _body(l10n, isVip),
-          ),
+      child: PlainPageScaffold(
+        pageKey: const Key('store-page'),
+        backKey: const Key('store-back'),
+        title: isVip ? l10n.vipTitle : l10n.rechargeTitle,
+        child: ListenableBuilder(
+          listenable: controller,
+          builder: (context, _) => _body(l10n, isVip),
         ),
       ),
     );