Expose AdminJS on nudentic.ir: nginx only proxied /api, so /admin never reached Nest.

infrastructure/nginx/nginx.ssl.conf.template

@@ -83,6 +83,21 @@ server {
         proxy_connect_timeout 300;
     }
 
+    # AdminJS (Nest, not under /api) — https://nudentic.ir/admin
+    location /admin {
+        proxy_pass http://dyolink_backend;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade;
+        proxy_read_timeout 300;
+        proxy_connect_timeout 300;
+    }
+
     location /health {
         access_log off;
         return 200 "healthy\n";