next.config.ts

import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  output: "standalone",
  // Next.js 16 blocks cross-origin requests to /_next/* dev resources
  // (HMR, source maps, dev assets) by default. When the dev server is
  // accessed via a non-localhost address — Tailscale, LAN IPs, etc. —
  // this prevents the page from hydrating and breaks all interactivity.
  // Allowlist the hosts/IPs we actually use during development.
  allowedDevOrigins: [
    "100.81.232.33", // tailscale
    "10.195.102.16", // lan
    "localhost",
  ],
  async redirects() {
    return [
      {
        // www serves the same pages on a second hostname, doubling crawl budget.
        source: "/:path*",
        has: [{ type: "host", value: "www.seqout.org" }],
        destination: "https://seqout.org/:path*",
        permanent: true,
      },
    ];
  },
  async rewrites() {
    // Proxy to localhost:8000 during local development
    // In production, /api routes are handled by the deployed backend
    if (process.env.NODE_ENV === "development") {
      return [
        {
          source: "/api/:path*",
          destination: "http://localhost:8000/:path*",
        },
      ];
    }
    return [];
  },
  async headers() {
    return [
      {
        source: "/:path*",
        headers: [
          {
            key: "Strict-Transport-Security",
            value: "max-age=31536000; includeSubDomains",
          },
          {
            key: "Referrer-Policy",
            value: "strict-origin-when-cross-origin",
          },
          {
            key: "Permissions-Policy",
            value: "camera=(), microphone=(), geolocation=(), browsing-topics=()",
          },
          {
            key: "Content-Security-Policy-Report-Only",
            value: [
              "default-src 'self'",
              "script-src 'self' 'unsafe-inline' 'unsafe-eval' https://www.googletagmanager.com https://www.google-analytics.com",
              "style-src 'self' 'unsafe-inline'",
              "img-src 'self' data: blob: https:",
              "font-src 'self' data:",
              "connect-src 'self' https:",
              "worker-src 'self' blob:",
              "frame-ancestors 'none'",
            ].join("; "),
          },
        ],
      },
    ];
  },
};

export default nextConfig;