fix(meeting_record): 在关闭浮动条前检查并保存录音

防止在录音状态下直接关闭浮动条导致录音丢失

lib/modules/meeting/controllers/meeting_record_controller.dart

@@ -218,6 +218,10 @@ class MeetingRecordController extends GetxController
           );
           return;
         case 'closeFloatingBar':
+          if (isRecording.value) {
+            await saveRecording();
+            return;
+          }
           _floatingBarManuallyClosed = true;
           await _stopAndroidRecordingFloatingBar();
           return;