💄 Optimize background color

lib/screens/post/post_detail.dart

@@ -66,7 +66,7 @@ class _PostDetailScreenState extends State<PostDetailScreen> {
     final double maxWidth = _data?.type == 'video' ? double.infinity : 640;
 
     return AppScaffold(
-      noBackground: true,
+      noBackground: ResponsiveScaffold.getIsExpand(context),
       appBar: AppBar(
         leading: BackButton(
           onPressed: () {

lib/screens/post/post_shuffle.dart

@@ -79,6 +79,7 @@ class _PostShuffleScreenState extends State<PostShuffleScreen> {
                               key: ValueKey(ele),
                               data: ele,
                               maxWidth: 640,
+                              useReplace: true,
                               onChanged: (ele) {
                                 _posts[idx] = ele;
                                 setState(() {});

lib/screens/post/publisher_page.dart

@@ -286,7 +286,7 @@ class _PostPublisherScreenState extends State<PostPublisherScreen>
     final sn = context.read<SnNetworkProvider>();
 
     return AppScaffold(
-      noBackground: true,
+      noBackground: ResponsiveScaffold.getIsExpand(context),
       body: NestedScrollView(
         controller: _scrollController,
         headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {