Close the conversion loop: member ID submission with Hermes Telegram notify

- Start page step 6 is now a bold gold-highlighted "Submit your NEW RM
  Circle ID" form with larger step numbers throughout; captures the
  sponsor the visitor was shown at join time.
- POST /api/public/submit-id: validates numeric ID, dedupes, stores on
  the volume, records a per-source "purchase" analytics event, fires a
  BeMob postback (txid=purchase-<clickid>) to close paid campaigns, and
  posts the new ID + sponsor + source to the configured Telegram chat
  (MB Hermes pattern). Rate-limited.
- Admin: Member ID Submissions table, "Confirmed joins" tile, and
  Telegram bot token / chat ID settings.

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

public/styles.css

@@ -46,3 +46,6 @@ a{color:inherit}.wrap{width:min(1160px,calc(100% - 32px));margin:auto}.nav{heigh
 .chat-hidden{display:none}
 .chat-typing{letter-spacing:3px;animation:chatpulse 1s infinite}
 @keyframes chatpulse{50%{opacity:.35}}
+
+.instruction{grid-template-columns:56px 1fr}
+.num{width:56px;height:56px;font-size:28px;border-radius:14px}