Track the join funnel end-to-end through the self-enroll page

- Self-enroll pageviews now tracked as the "joinnow" event (track.js loaded
  on the page; server whitelist + admin tiles/columns extended)
- A confirmed on-chain registration in the wallet-connect flow now auto-posts
  to the submit-id API, so every self-enroll join records a submission with
  source + clickid attribution and fires the purchase event and BeMob postback
  with no manual ID entry
- Optional name/handle field on the join page feeds the submission and the
  team Telegram alert
- Admin Traffic panel: Join-now views tile, Join-now -> Confirmed conversion,
  and a per-source Confirmed column for campaign-level ROI reading

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

private/join-now.html

@@ -33,6 +33,9 @@
     <h2 style="margin:0 0 10px;font-size:18px">2 · Join</h2>
     <div class="dj-kv"><span>Tier</span><b>Premium (the tier the team builds at)</b></div>
     <div class="dj-kv"><span>You will pay</span><b id="joinCost">—</b></div>
+    <label style="display:block;margin-top:14px;font-size:13px;color:var(--muted)">Your name or Telegram handle <span style="opacity:.7">(optional — helps the team welcome you)</span>
+      <input id="memberName" maxlength="60" placeholder="e.g. @yourhandle" style="display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#08192880;color:var(--text);font-size:14px">
+    </label>
     <button id="joinBtn" class="btn btn-primary" style="margin-top:14px;width:100%">Join the team →</button>
     <p style="color:var(--muted);font-size:12px;margin:10px 0 0">Confirm the amount in your wallet before signing. If anything is off, the contract simply rejects it and you keep your POL.</p>
   </div>
@@ -49,4 +52,4 @@
   <p class="micro" style="text-align:center">No income is guaranteed. Cryptocurrency and smart-contract participation carry risk. Only use funds you can afford to lose.</p>
 </main>
 <footer class="wrap disclaimer">All figures are read live from the RM Circle smart contract on Polygon. Not an earnings guarantee or investment advice. Participation carries risk of loss.<div class="footer-links"><a href="/">Home</a><a href="/training">Training</a><a href="/how-pay-works">How You Get Paid</a><a href="/contract">Contract Security</a><a href="/disclaimer">Disclaimers</a></div></footer>
-<script src="/rmc-wallet.js"></script><script src="/join-now.js"></script></body></html>
+<script src="/track.js"></script><script src="/rmc-wallet.js"></script><script src="/join-now.js"></script></body></html>