fix: address notification review feedback

src/utils/pageTitleNotification.ts

@@ -33,12 +33,17 @@ const clearTitleIndicator = (): void => {
   }
 
   removeReturnListeners();
+  removePageInactiveListener();
 
   if (document.title.startsWith(getIndicatorPrefix())) {
     document.title = stripIndicator(document.title);
   }
 };
 
+const removePageInactiveListener = (): void => {
+  document.removeEventListener('visibilitychange', handlePageInactive);
+};
+
 const scheduleClear = (): void => {
   if (clearTimer !== null) {
     window.clearTimeout(clearTimer);
@@ -47,6 +52,9 @@ const scheduleClear = (): void => {
   clearTimer = window.setTimeout(() => {
     clearTitleIndicator();
   }, TITLE_INDICATOR_CLEAR_DELAY_MS);
+
+  removePageInactiveListener();
+  document.addEventListener('visibilitychange', handlePageInactive, { once: true });
 };
 
 function handleUserReturn(): void {
@@ -59,6 +67,24 @@ function handleUserReturn(): void {
   scheduleClear();
 }
 
+function handlePageInactive(): void {
+  if (document.visibilityState !== 'hidden') {
+    return;
+  }
+
+  if (clearTimer !== null) {
+    window.clearTimeout(clearTimer);
+    clearTimer = null;
+  }
+
+  if (!returnListenersAttached) {
+    document.addEventListener('visibilitychange', handleUserReturn);
+    window.addEventListener('focus', handleUserReturn, true);
+    window.addEventListener('click', handleUserReturn, true);
+    returnListenersAttached = true;
+  }
+}
+
 export const showCompletionTitleIndicator = (): void => {
   if (typeof document === 'undefined' || typeof window === 'undefined') {
     return;