chore: Follow up create group

lib/pages/new_group/new_group_view.dart

@@ -42,7 +42,9 @@ class NewGroupView extends StatelessWidget {
                       radius: Avatar.defaultSize / 2,
                       child: avatar == null
                           ? const Icon(Icons.camera_alt_outlined)
-                          : Image.memory(
+                          : ClipRRect(
+                              borderRadius: BorderRadius.circular(90),
+                              child: Image.memory(
                                 avatar,
                                 width: Avatar.defaultSize,
                                 height: Avatar.defaultSize,
@@ -50,6 +52,7 @@ class NewGroupView extends StatelessWidget {
                               ),
                             ),
                     ),
+                  ),
                   const SizedBox(width: 16),
                   Expanded(
                     child: TextField(

lib/pages/new_private_chat/new_private_chat_view.dart

@@ -29,7 +29,7 @@ class NewPrivateChatView extends StatelessWidget {
         min(MediaQuery.of(context).size.width - 16, 256).toDouble();
     return Scaffold(
       appBar: AppBar(
-        scrolledUnderElevation: Theme.of(context).appBarTheme.elevation,
+        scrolledUnderElevation: 0,
         leading: const Center(child: BackButton()),
         title: Text(L10n.of(context)!.newChat),
         backgroundColor: Theme.of(context).scaffoldBackgroundColor,