Fix audit form backend, update blog page, add I2P links, robots.txt, sitemap, audit form JS

- Add /api/audit endpoint to contact-api (deployed to server)
- Replace blog ghost links with 'coming soon' placeholder
- Add I2P mirror link to all page footers
- Wire up audit form frontend handler in main.js
- Update contact form handler to use fetch API
- Add robots.txt and sitemap.xml
- Add scripts/sync-eepsite.sh for I2P/clearnet sync

contact.html

@@ -96,6 +96,7 @@
   <footer class="footer has-background-dark has-text-light">
     <div class="content has-text-centered">
       <p><strong>🌍 Krusty Planet</strong> — Privacy-focused AI consulting</p>
+      <p class="is-size-7 mt-3"><span class="has-text-success">🔒 I2P Mirror:</span> <a href="http://g3xdiv7psi6y6l255kbkzowemsnd4tmbvy5ykaoajlu7oboma7zq.b32.i2p" style="color:#b5b5b5;" rel="nofollow noopener">g3xdiv7psi6y6l255kbkzowemsnd4tmbvy5ykaoajlu7oboma7zq.b32.i2p</a></p>
     </div>
   </footer>