Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/js/MonitorStream.js

@@ -416,7 +416,9 @@ function MonitorStream(monitorData) {
         (e) => {
           this.writeTextInfoBlock("Paused", {showImg: false});
           manageEventListener.removeEventListener(this.handlerEventListener['volumechange']);
-          pauseAudioMotion(this.id);
+          if (typeof pauseAudioMotion === 'function') {
+            pauseAudioMotion(this.id);
+          }
         }
     );
   };