vercel.json

{
  "headers": [
    {
      "source": "/(.*)",
      "headers": [
        { "key": "X-Frame-Options", "value": "DENY" },
        { "key": "X-Content-Type-Options", "value": "nosniff" },
        { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" },
        {
          "key": "Content-Security-Policy",
          "value": "default-src 'self'; script-src 'self'; worker-src 'self' blob:; connect-src 'self' https://*.supabase.co wss://*.supabase.co https://nominatim.openstreetmap.org https://router.project-osrm.org https://*.openstreetmap.org https://basemaps.cartocdn.com https://*.basemaps.cartocdn.com; img-src 'self' data: https://*.supabase.co https://basemaps.cartocdn.com https://*.basemaps.cartocdn.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com;"
        }
      ]
    }
  ]
}