chore: Follow up set read marker

lib/pages/chat/chat.dart

@@ -300,6 +300,9 @@ class ChatController extends State<ChatPageWithRoom>
         _showScrollUpMaterialBanner(readMarkerEventId);
       }
 
+      // Mark room as read on first visit if requirements are fulfilled
+      setReadMarker();
+
       if (!mounted) return;
     } catch (e, s) {
       ErrorReporter(context, 'Unable to load timeline').onErrorCallback(e, s);