feat(flutter): 统一二级页头并恢复新剧暖色

lib/pages/settings/settings_page.dart

@@ -9,6 +9,7 @@ import '../../core/data/services/auth_controller.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/auth_gate.dart';
+import '../../core/widgets/plain_page_scaffold.dart';
 import '../../l10n/app_localizations.dart';
 import '../account/account_entry_card.dart';
 import '../notices/notices_page.dart';
@@ -23,28 +24,21 @@ class SettingsPage extends StatelessWidget {
     final auth = context.watch<AuthController>();
     return Theme(
       data: AppTheme.light(),
-      child: Scaffold(
-        key: const Key('settings-page'),
-        backgroundColor: AppColors.ink,
-        appBar: AppBar(
-          backgroundColor: AppColors.ink,
-          foregroundColor: AppColors.onSurface,
-          title: Text(l10n.settings),
-        ),
-        body: SafeArea(
-          top: false,
-          child: ListView(
-            padding: const EdgeInsets.fromLTRB(14, 12, 14, 28),
-            children: [
-              if (auth.isSignedIn) ...[
-                const AccountEntryCard(),
-                const SizedBox(height: 12),
-              ],
-              _noticesTile(context, l10n),
-              const SizedBox(height: 24),
-              _authAction(context, l10n, auth),
+      child: PlainPageScaffold(
+        pageKey: const Key('settings-page'),
+        backKey: const Key('settings-back'),
+        title: l10n.settings,
+        child: ListView(
+          padding: const EdgeInsets.fromLTRB(14, 8, 14, 28),
+          children: [
+            if (auth.isSignedIn) ...[
+              const AccountEntryCard(),
+              const SizedBox(height: 12),
             ],
-          ),
+            _noticesTile(context, l10n),
+            const SizedBox(height: 24),
+            _authAction(context, l10n, auth),
+          ],
         ),
       ),
     );