next.config.mjs

/** @type {import('next').NextConfig} */
const isDev = process.env.NODE_ENV !== "production";

const csp = [
  "default-src 'self'",
  "base-uri 'self'",
  "frame-ancestors 'none'",
  "object-src 'none'",
  "img-src 'self' data: blob: https:",
  "font-src 'self' data:",
  "connect-src 'self' https: ws: wss:",
  `script-src 'self' 'unsafe-inline'${isDev ? " 'unsafe-eval'" : ""}`,
  "style-src 'self' 'unsafe-inline'"
].join("; ");

const nextConfig = {
  reactStrictMode: true,
  distDir: process.env.NEXT_DIST_DIR || ".next",
  experimental: {
    typedRoutes: false
  },
  async headers() {
    return [
      {
        source: "/:path*",
        headers: [
          { key: "Content-Security-Policy", value: csp },
          { key: "X-Frame-Options", value: "DENY" },
          { key: "X-Content-Type-Options", value: "nosniff" },
          { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
          { key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=(), browsing-topics=()" }
        ]
      }
    ];
  }
};

export default nextConfig;