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/constants.ts

@@ -1,16 +1,16 @@
 import { CreditCard, LayoutDashboard, Settings, FileText, Users, type LucideIcon } from 'lucide-react';
 
 export interface AdminNavItem {
-  label: string;
+  labelKey: string;
   href: string;
   icon: LucideIcon;
 }
 
 export const adminNavItems: AdminNavItem[] = [
-  { label: 'Dashboard', href: '/admin', icon: LayoutDashboard },
-  { label: 'Users', href: '/admin/users', icon: Users },
-  { label: 'Pricing & Stripe', href: '/admin/pricing', icon: CreditCard },
-  { label: 'Providers', href: '/admin/settings', icon: Settings },
-  { label: 'System', href: '/admin/system', icon: Settings },
-  { label: 'Logs', href: '/admin/logs', icon: FileText },
+  { labelKey: 'admin.nav.dashboard', href: '/admin', icon: LayoutDashboard },
+  { labelKey: 'admin.nav.users', href: '/admin/users', icon: Users },
+  { labelKey: 'admin.nav.pricing', href: '/admin/pricing', icon: CreditCard },
+  { labelKey: 'admin.nav.providers', href: '/admin/settings', icon: Settings },
+  { labelKey: 'admin.nav.system', href: '/admin/system', icon: Settings },
+  { labelKey: 'admin.nav.logs', href: '/admin/logs', icon: FileText },
 ];