🐛 Fix bugs

lib/screens/discovery/article_detail.dart

@@ -20,6 +20,7 @@ class ArticleDetailScreen extends ConsumerWidget {
     final articleAsync = ref.watch(articleDetailProvider(articleId));
 
     return AppScaffold(
+      isNoBackground: false,
       body: articleAsync.when(
         data:
             (article) => AppScaffold(

lib/widgets/post/post_replies_sheet.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:gap/gap.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:island/models/post.dart';
 import 'package:island/pods/userinfo.dart';
@@ -19,11 +20,9 @@ class PostRepliesSheet extends HookConsumerWidget {
 
     return SheetScaffold(
       titleText: 'repliesCount'.plural(post.repliesCount),
-      child: Column(
+      child: Stack(
         children: [
-          // Replies list
+          CustomScrollView(
-          Expanded(
-            child: CustomScrollView(
             slivers: [
               PostRepliesList(
                 postId: post.id.toString(),
@@ -31,12 +30,15 @@ class PostRepliesSheet extends HookConsumerWidget {
                   Navigator.pop(context);
                 },
               ),
+              SliverGap(80),
             ],
           ),
-          ),
-          // Quick reply section
           if (user.value != null)
-            PostQuickReply(
+            Positioned(
+              bottom: 0,
+              left: 0,
+              right: 0,
+              child: PostQuickReply(
                 parent: post,
                 onPosted: () {
                   ref.invalidate(postRepliesNotifierProvider(post.id));
@@ -49,6 +51,7 @@ class PostRepliesSheet extends HookConsumerWidget {
                 top: 8,
                 horizontal: 16,
               ),
+            ),
         ],
       ),
     );