transform admin panel with comprehensive professional UI

- migrate from SQLite to PostgreSQL with Drizzle ORM
- implement comprehensive AdminLayout with expandable sidebar navigation
- create professional dashboard with real-time charts and metrics
- add advanced monitoring, reporting, and export functionality
- fix menu alignment and remove non-existent pages
- eliminate duplicate headers and improve UI consistency
- add Tailwind CSS v3 for professional styling
- expand database schema from 6 to 15 tables
- implement role-based access control and API key management
- create comprehensive settings, monitoring, and system info pages

pages/api/admin/api-keys.ts

@@ -42,6 +42,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
         .values({
           keyHash: keyHash,
           name: name,
+          ownerEmail: 'admin@hliadka.sk', // Default admin email
           permissions: JSON.stringify(permissions),
           rateLimit: rate_limit,
           isActive: true