Leaderboard + referral contest: /leaderboard (week/month/all, read from chain, own positions excluded), Overview card with own rank, weekly and monthly winners recorded at rollover with credit ladders granted automatically and announced to Telegram

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

public/my.html

@@ -258,6 +258,8 @@
             </div>
             <div class="card"><h3>Earning levels</h3>
               <p id="qualLine" class="muted small">…</p></div>
+            <div class="card" id="lbCard" hidden><div class="card-head"><h3>Leaderboard</h3><span class="sub"><a href="/leaderboard" target="_blank" rel="noopener" style="color:var(--mint);text-decoration:none">this week's contest</a></span></div>
+              <div id="lbList" class="small"></div></div>
             <div class="card" id="newsCard" hidden><div class="card-head"><h3>What's new</h3><span class="sub"><a href="/whats-new" target="_blank" rel="noopener" style="color:var(--mint);text-decoration:none">release notes and roadmap</a></span></div>
               <div id="newsList" class="small"></div></div>
             <div class="card" id="promoCard"><h3>Have a promo code?</h3>
@@ -917,7 +919,7 @@
 <script src="/assets/common.js?v=20260913a"></script>
 <script src="/assets/wallet.js?v=20260911a"></script>
 <script src="/assets/promo.js?v=20260911a"></script>
-<script src="/assets/my.js?v=20260914a"></script>
+<script src="/assets/my.js?v=20260914b"></script>
 <script src="/assets/chat.js?v=20260907l"></script>
 </body>
 </html>