feat: homelab deployment - NPM + IONOS DNS + monitoring + NAS backup

- Restructured docker-compose for Nginx Proxy Manager (no custom nginx)
- Added domain wordly.art configuration
- Added Prometheus + Grafana monitoring stack with pre-configured dashboards
- Added PostgreSQL backup script to NAS (daily/weekly/monthly rotation)
- Added alert rules for backend, system, and Docker metrics
- Updated deployment guide for NPM + IONOS DNS homelab setup
- Added marketing plan document
- PDF translator and watermark support
- Enhanced middleware, routes, and translator modules

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/app/admin/layout.tsx

@@ -6,6 +6,7 @@ import { useTranslationStore } from "@/lib/store";
 import { API_BASE } from "@/lib/config";
 import { AdminSidebar } from "./AdminSidebar";
 import { AdminHeader } from "./AdminHeader";
+import { useI18n } from "@/lib/i18n";
 
 export default function AdminLayout({
   children,
@@ -15,9 +16,9 @@ export default function AdminLayout({
   const router = useRouter();
   const pathname = usePathname();
   const { settings, setAdminToken } = useTranslationStore();
+  const { t } = useI18n();
   const [isChecking, setIsChecking] = useState(true);
   const [isValid, setIsValid] = useState(false);
-  /** Sans ça, au premier rendu après un chargement complet le token n’est pas encore lu depuis localStorage → fausse absence de token → redirection /admin/login (bug sur F5 ou URL directe). */
   const [persistHydrated, setPersistHydrated] = useState(false);
 
   useEffect(() => {
@@ -75,7 +76,7 @@ export default function AdminLayout({
   if (isChecking && pathname !== "/admin/login") {
     return (
       <div className="min-h-screen bg-card flex items-center justify-center">
-        <div className="text-muted-foreground text-sm">Vérification de l&apos;authentification...</div>
+        <div className="text-muted-foreground text-sm">{t('admin.layout.checking')}</div>
       </div>
     );
   }