I finished the remaining reliability, sharing, performance, and polish items across the admin

app.
  What’s done
    locales/en/mobile.json and resources/js/admin/i18n/locales/de/mobile.json.
  - Error recovery CTAs on Photos, Notifications, Tasks, and QR screens so users can retry without a full reload in    resources/js/admin/mobile/EventPhotosPage.tsx, resources/js/admin/mobile/NotificationsPage.tsx, resources/js/admin/
    mobile/EventTasksPage.tsx, resources/js/admin/mobile/QrPrintPage.tsx.
  - QR share uses native share sheet when available, with clipboard fallback in resources/js/admin/mobile/
    QrPrintPage.tsx.
  - Lazy‑loaded photo grid thumbnails for better performance in resources/js/admin/mobile/EventPhotosPage.tsx.
  - New helper + tests for queue count logic in resources/js/admin/mobile/lib/queueStatus.ts and resources/js/admin/
    mobile/lib/queueStatus.test.ts.

resources/js/admin/mobile/lib/lightboxImage.ts

@@ -0,0 +1,16 @@
+import type { TenantPhoto } from '../../api';
+
+export type LightboxImageSources = {
+  initial: string | null;
+  full: string | null;
+};
+
+export function resolveLightboxSources(photo: TenantPhoto): LightboxImageSources {
+  const thumbnail = photo.thumbnail_url ?? null;
+  const full = photo.url ?? null;
+
+  return {
+    initial: thumbnail ?? full,
+    full: full && full !== thumbnail ? full : null,
+  };
+}