opt: live dyn cover

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/live_room/controller.dart

@@ -194,4 +194,10 @@ class LiveRoomController extends GetxController {
       }
     });
   }
+
+  @override
+  void onClose() {
+    scrollController.dispose();
+    super.onClose();
+  }
 }