Add dismissible Weekly Huddle pop-up overlay (Sept 8)

Self-contained /announce.js injects a branded, dismissible event overlay
(the flyer + all four time zones + Join Google Meet button). Included on the
main funnel and member pages. Auto-expires after the huddle and shows once
per browser until dismissed; edit the EV block to reuse for future events.

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

public/join.html

@@ -29,4 +29,5 @@
 <div class="callout warning" style="margin-top:12px;max-width:880px;margin-left:auto;margin-right:auto"><strong>Risk reminder:</strong> participation involves cryptocurrency and smart-contract risk. No income is guaranteed. Use only funds you can afford to lose.</div></div></section>
 
 </main><footer class="wrap disclaimer">This independent team page is educational and is not an earnings guarantee or investment advice. Cryptocurrency and smart-contract participation involve risk, including possible loss of funds. Never use funds you cannot afford to lose. Results depend on actual participation, qualification, upgrades, smart-contract behavior, and the market value of POL.<div class="footer-links"><a href="/training">Training</a><a href="/my">Member Dashboard</a><a href="/contract">Contract Security</a><a href="/disclaimer">Disclaimers</a><a href="/tools">Promo Tools</a><a href="/privacy">Privacy</a><a href="/refunds">Refunds</a></div></footer>
-<script src="/track.js"></script><script src="/join.js"></script><script src="/payouts.js" defer></script><script src="/chat.js" defer></script><script src="/translate.js" defer></script><script src="/tg-app.js" defer></script><script src="/nav-dash.js" defer></script></body></html>
+<script src="/track.js"></script><script src="/join.js"></script><script src="/payouts.js" defer></script><script src="/chat.js" defer></script><script src="/translate.js" defer></script><script src="/tg-app.js" defer></script><script src="/nav-dash.js" defer></script>  <script src="/announce.js"></script>
+</body></html>