added installed as pwa checking

frontend/plugins/pwaUpdate.client.ts

@@ -7,9 +7,19 @@ export default defineNuxtPlugin(() => {
     if ("serviceWorker" in navigator) {
         wb = new Workbox("/sw.js");
 
+        const isStandalone = window.matchMedia(
+            "(display-mode: standalone)"
+        ).matches;
+        const isIOSPWA = (window.navigator as any).standalone;
+        const isInstalledAsPWA = isStandalone || isIOSPWA;
+
         // Listen for messages from the service worker
         navigator.serviceWorker.addEventListener("message", (event) => {
-            if (event.data && event.data.type === "VERSION_CHECK") {
+            if (
+                event.data &&
+                event.data.type === "VERSION_CHECK" &&
+                isInstalledAsPWA
+            ) {
                 checkForUpdate(event.data.version);
             }
         });