fix(frontend): remove /api proxy from nginx — cloud deploy uses OpenResty for routing

frontend/nginx.conf

@@ -20,35 +20,6 @@ server {
         access_log off;
     }
 
-    # Keep the browser and API on the same origin in production. This must be
-    # evaluated before the SPA fallback, otherwise /api/* returns index.html.
-    location /api/ {
-        proxy_pass http://backend:8000;
-        proxy_http_version 1.1;
-        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_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection "upgrade";
-        proxy_connect_timeout 15s;
-        proxy_read_timeout 3600s;
-        proxy_send_timeout 3600s;
-        proxy_buffering off;
-    }
-
-    location /docs {
-        proxy_pass http://backend:8000;
-        proxy_set_header Host $host;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    }
-
-    location /openapi.json {
-        proxy_pass http://backend:8000;
-        proxy_set_header Host $host;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    }
-
     # SPA fallback - all routes serve index.html
     location / {
         try_files $uri $uri/ /index.html;