Nezávislá alternatíva k Cloudflare Turnstile

<!-- Odstráňte toto: -->
<script src="https://challenges.cloudflare.com/
  turnstile/v0/api.js"></script>
<div class="cf-turnstile" 
  data-sitekey=".."></div>

<!-- Pridajte toto: -->
<script src="https://api.silentshield.io/client.js?k=YOUR_API_KEY"
  crossorigin="anonymous" defer></script>

// Overiť token na strane servera:
const res = await fetch(
  'https://api.silentshield.io/api/v1/captcha/verify-nonce',
  {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-Api-Key': process.env.SILENTSHIELD_API_KEY,
    },
    body: JSON.stringify({ nonce: req.body.behavior_nonce }),
  }
);
const { ok, verdict } = await res.json();