♻️ Use controller instead of state to manage history

lib/widgets/account/friend_list.dart

@@ -67,7 +67,7 @@ class SliverFriendList extends StatelessWidget {
   Widget build(BuildContext context) {
     return SliverList.builder(
       itemCount: items.length,
-      itemBuilder: (_, __) => buildItem(_, __),
+      itemBuilder: (context, idx) => buildItem(context, idx),
     );
   }
 }

lib/widgets/chat/call/chat_call_action.dart

@@ -65,7 +65,7 @@ class _ChatCallButtonState extends State<ChatCallButton> {
         ? widget.realm?.alias
         : 'global';
     final resp = await client
-        .delete('/api/channels/${scope}/${widget.channel.alias}/calls/ongoing');
+        .delete('/api/channels/$scope/${widget.channel.alias}/calls/ongoing');
     if (resp.statusCode == 200) {
       if (widget.onEnded != null) widget.onEnded!();
     } else {

lib/widgets/posts/post_item.dart

@@ -98,7 +98,7 @@ class _PostItemState extends State<PostItem> {
 
     if (labels.isNotEmpty) {
       return Text(
-        labels.join(" · "),
+        labels.join(' · '),
         textAlign: TextAlign.left,
         style: TextStyle(
           fontSize: 12,