next.config.ts

import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  output: "standalone",

  // Non-CSP security headers (static, safe to set at build time)
  // CSP is set dynamically in middleware.ts to include runtime env vars (e.g. S3_PUBLIC_URL)
  async headers() {
    return [
      {
        source: "/(.*)",
        headers: [
          { key: "X-Frame-Options", value: "DENY" },
          { key: "X-Content-Type-Options", value: "nosniff" },
          { key: "X-XSS-Protection", value: "1; mode=block" },
          { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
          {
            key: "Permissions-Policy",
            value: "camera=(), microphone=(), geolocation=()",
          },
        ],
      },
    ];
  },

  // Prevent server components from leaking env vars to client
  serverExternalPackages: ["ioredis"],

  experimental: {
    // Typed routes
    typedRoutes: true,
  },
};

export default nextConfig;