server {
    listen 7860;

    client_max_body_size 2G;
    proxy_read_timeout 600s;
    proxy_send_timeout 600s;

    # WebSocket upgrade support
    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;

    # FastAPI: API endpoints
    location /api/ {
        proxy_pass http://127.0.0.1:8080;
    }

    # FastAPI: WebSocket progress
    location /ws/ {
        proxy_pass http://127.0.0.1:8080;
    }

    # FastAPI: file downloads
    location /downloads/ {
        proxy_pass http://127.0.0.1:8080;
    }

    # Next.js: everything else (including HMR WebSocket)
    location / {
        proxy_pass http://127.0.0.1:3000;
    }
}