Add Monero donation address to footer

XMR — the only on-brand way to accept donations for a privacy protocol.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Reeseysan

index.html

@@ -333,7 +333,9 @@ <h3>Instant Revocation</h3>
 
   <footer>
     <p>AGPLv3 &middot; <a href="https://second2none.net">Second 2 None LLC</a> &middot; <a href="https://github.com/clawback-protocol/spec">GitHub</a></p>
-    <p style="margin-top: 8px;">Clawback Protocol&trade; &middot; USPTO Serial No. 99657348</p>
+    <p style="margin-top: 12px; color: #444; font-size: 11px;">Support development &middot; XMR</p>
+    <p style="margin-top: 4px; font-size: 10px; color: #333; word-break: break-all; max-width: 520px; margin-left: auto; margin-right: auto; letter-spacing: 0.5px;">86LN8rRqUH35jfkaiDJQmFJTou4ruphKmSY3PD2sFn7SCg5QK6ko9XhhT63pRPVasoUcfZTm8hBTgL2mp2Gksrc498KzZ5S</p>
+    <p style="margin-top: 16px;">Clawback Protocol&trade; &middot; USPTO Serial No. 99657348</p>
     <p>&copy; 2026 Second 2 None LLC</p>
   </footer>