fix: user bottom sheet design

lib/components/user_bottom_sheet.dart

@@ -153,12 +153,14 @@ class UserBottomSheet extends StatelessWidget {
                     ),
                 ],
               ),
-              body: ListView(
+              body: Column(
                 children: [
-                  ContentBanner(
+                  Expanded(
+                    child: ContentBanner(
                       user.avatarUrl,
                       defaultIcon: Icons.person_outline,
                     ),
+                  ),
                   ListTile(
                     title: Text(L10n.of(context).username),
                     subtitle: Text(user.id),