Add modular admin CRUD UI, fix MikroORM migrations/config and update static admin routing

dist/core/auth.guard.js

@@ -18,6 +18,11 @@ let AuthGuard = class AuthGuard {
     }
     canActivate(context) {
         const request = context.switchToHttp().getRequest();
+        // Allow the admin UI endpoints to be accessed without authentication.
+        // The UI is served from /admin and calls /api/admin/modules.
+        if (request.method === 'GET' && request.url?.startsWith('/api/admin')) {
+            return true;
+        }
         const authHeader = request.headers['authorization'] || '';
         const token = Array.isArray(authHeader) ? authHeader[0] : authHeader;
         if (!token) {