Implemented guest-only PWA using vite-plugin-pwa (the actual published package; @vite-pwa/plugin isn’t on npm) with

injectManifest, a new typed SW source, runtime caching, and a non‑blocking update toast with an action button. The
  guest shell now links a dedicated manifest and theme color, and background upload sync is managed in a single
  PwaManager component.

  Key changes (where/why)

  - vite.config.ts: added VitePWA injectManifest config, guest manifest, and output to /public so the SW can control /
    scope.
  - resources/js/guest/guest-sw.ts: new Workbox SW (precache + runtime caching for guest navigation, GET /api/v1/*,
    images, fonts) and preserves push/sync/notification logic.
  - resources/js/guest/components/PwaManager.tsx: registers SW, shows update/offline toasts, and processes the upload
    queue on sync/online.
  - resources/js/guest/components/ToastHost.tsx: action-capable toasts so update prompts can include a CTA.
  - resources/js/guest/i18n/messages.ts: added common.updateAvailable, common.updateAction, common.offlineReady.
  - resources/views/guest.blade.php: manifest + theme color + apple touch icon.
  - .gitignore: ignore generated public/guest-sw.js and public/guest.webmanifest; public/guest-sw.js removed since it’s
    now build output.

resources/js/guest/main.tsx

@@ -36,6 +36,7 @@ const appRoot = async () => {
   const { RouterProvider } = await import('react-router-dom');
   const { router } = await import('./router');
   const { ToastProvider } = await import('./components/ToastHost');
+  const { default: PwaManager } = await import('./components/PwaManager');
   const { LocaleProvider } = await import('./i18n/LocaleContext');
   const { default: MatomoTracker } = await import('@/components/analytics/MatomoTracker');
   const rawMatomo = (window as any).__MATOMO_GUEST__ as { enabled?: boolean; url?: string; siteId?: string } | undefined;
@@ -47,21 +48,6 @@ const appRoot = async () => {
       }
     : undefined;
 
-  // Register a minimal service worker for background sync (best-effort)
-  if ('serviceWorker' in navigator) {
-    navigator.serviceWorker.register('/guest-sw.js').catch(() => {});
-    navigator.serviceWorker.addEventListener('message', (evt) => {
-      if (evt.data?.type === 'sync-queue') {
-        import('./queue/queue').then((m) => m.processQueue().catch(() => {}));
-      }
-    });
-    // Also attempt to process queue on load and when going online
-    import('./queue/queue').then((m) => m.processQueue().catch(() => {}));
-    window.addEventListener('online', () => {
-      import('./queue/queue').then((m) => m.processQueue().catch(() => {}));
-    });
-  }
-
   createRoot(rootEl).render(
     <Sentry.ErrorBoundary fallback={<GuestFallback message="Erlebnisse können nicht geladen werden." />}>
       <React.StrictMode>
@@ -69,6 +55,7 @@ const appRoot = async () => {
           <LocaleProvider>
             <ToastProvider>
               <MatomoTracker config={matomoConfig} />
+              <PwaManager />
               <Suspense fallback={<GuestFallback message="Erlebnisse werden geladen …" />}>
                 <RouterProvider router={router} />
               </Suspense>