Update web_src/js/components/RepoActionView.vue

Co-authored-by: silverwind <me@silverwind.io>
Signed-off-by: Shafi Ahmed <98274448+ita004@users.noreply.github.com>

Author: ita004

web_src/js/components/RepoActionView.vue

@@ -193,7 +193,7 @@ export default defineComponent({
 
     // Set up observer on the steps container (safer and more efficient than document.body)
     const stepsContainer = (this.$refs.steps as HTMLElement);
-    if (stepsContainer && typeof MutationObserver !== 'undefined') {
+    if (stepsContainer && 'MutationObserver' in window) {
       this.mutationObserver = new MutationObserver((mutations) => {
         for (const m of mutations) {
           // Auto-scroll new log lines as they appear