fix recording start stop

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/desktop/pages/remote_page.dart

@@ -118,6 +118,7 @@ class _RemotePageState extends State<RemotePage>
   void dispose() {
     debugPrint("REMOTE PAGE dispose ${widget.id}");
     _ffi.dialogManager.hideMobileActionsOverlay();
+    _ffi.recordingModel.onClose();
     _rawKeyFocusNode.dispose();
     _ffi.close();
     _timer?.cancel();

flutter/lib/desktop/widgets/remote_menubar.dart

@@ -359,9 +359,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
               tooltip: value.start
                   ? translate('Stop session recording')
                   : translate('Start session recording'),
-              onPressed: () async {
-                await value.toggle();
-              },
+              onPressed: () => value.toggle(),
               icon: Icon(
                 value.start
                     ? Icons.pause_circle_filled