/my: default to pitch on link visits + big Join button above the fold

- default tab now: shared /my/<id> link -> Team Build pitch; form lookup /
  returning member on bare /my / #dash link -> dashboard (replaces the flaky
  "have you seen this ID before" heuristic that dumped returning prospects
  straight into the dashboard).
- added a big gold "Join the Team" CTA in the hero (right column), above the
  fold, so a sold visitor can join without scrolling past the video.

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

public/my.html

@@ -7,7 +7,7 @@
 <div class="mp-context"><span class="mp-who">Member <span class="gold" id="dTitle">#—</span>'s RM Circle page</span> <span id="dVerified" class="live-badge" style="vertical-align:middle"><span class="dot"></span> Verified on-chain</span> <span id="dQualified"></span> <button id="switchId" class="btn btn-secondary btn-sm mp-switch">Look up another ID</button></div>
 <div class="mp-tabs"><button class="mp-tab" data-tab="pitch">The Team Build<span>What this is &amp; how to join</span></button><button class="mp-tab" data-tab="dash">Position Dashboard<span>This position's live numbers</span></button></div>
 <section id="tabPitch" class="mp-panel">
-  <div class="pitch-hero"><div class="eyebrow">You've landed on Member <span id="pInvId">#—</span>'s page</div><h1 class="pitch-h1">Get Your 2.<br>Help Your 2 <span class="gold">Get Theirs.</span></h1><p class="pitch-lede">The RM Circle is a team-first build on the Polygon blockchain. Every payout happens on a public smart contract that no one can fake, pause, or edit — no company holds your money. The plan is simple, and it duplicates.</p></div>
+  <div class="pitch-hero"><div class="pitch-hero-text"><div class="eyebrow">You've landed on Member <span id="pInvId">#—</span>'s page</div><h1 class="pitch-h1">Get Your 2.<br>Help Your 2 <span class="gold">Get Theirs.</span></h1><p class="pitch-lede">The RM Circle is a team-first build on the Polygon blockchain. Every payout happens on a public smart contract that no one can fake, pause, or edit — no company holds your money. The plan is simple, and it duplicates.</p></div><div class="pitch-hero-cta"><div class="pitch-hero-eye">Ready to build?</div><a id="pHeroJoin" class="btn btn-primary pitch-hero-btn" href="/join">Join the Team →</a><p class="pitch-hero-hint">Dive in now, or scroll for the 60-second overview and the live proof below.<br><span class="pitch-hero-dim">No income is guaranteed.</span></p></div></div>
   <div class="pitch-video"><video class="promo" controls preload="none" playsinline poster="/v/rmc-combined-poster.jpg" src="/v/rmc-combined-fe1347c964.mp4"></video><div class="pitch-vcap">▶ <strong>The 60-second overview</strong> — plays right here, no leaving the page.</div></div>
   <div class="pitch-steps"><div class="pitch-step"><span class="pitch-n">1</span><div><strong>See how it works</strong><span>Watch the overview above ↑, then the full pay-flow — plain English, no jargon.</span></div></div><div class="pitch-step"><span class="pitch-n">2</span><div><strong>Get set up</strong><span>A Polygon wallet plus POL to enter. The training walks you through every step.</span></div></div><div class="pitch-step"><span class="pitch-n">3</span><div><strong>Join the team</strong><span>Enter under this member — you're placed on the team and start building your own 2.</span></div></div></div>
   <div class="pitch-proof"><div class="lab">Don't take our word for it</div><h3>This is Member <span id="pProofId">#—</span>'s real position — read live from the blockchain.</h3><div class="pitch-nums"><div class="pnum"><b class="ok" id="pEarned">—</b><small>POL earned, on-chain</small></div><div class="pnum"><b class="tl" id="pTeam">—</b><small>members on their team</small></div><div class="pnum"><b class="gd" id="pLevel">—</b><small>current level of 8</small></div></div></div>