Refresh promo banner kit — code-composited, on-brand, crisp

Regenerated hero 1200x630, 728x90, 468x60, 300x250, 160x600, 120x600 by
compositing the new logo + headline + mint CTA on a dark mint-glow ground
(canvas, not AI) so text is always crisp and on-brand. Leaderboard tagline
auto-fits; previews cache-busted (?v=2).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/my.html

@@ -681,7 +681,7 @@
 </div>
 <script src="/assets/common.js?v=20260908a"></script>
 <script src="/assets/wallet.js?v=20260907q"></script>
-<script src="/assets/my.js?v=20260907y"></script>
+<script src="/assets/my.js?v=20260908b"></script>
 <script src="/assets/chat.js?v=20260907l"></script>
 </body>
 </html>