PolHunter return loop: ?from=polhunter sets iap.return (landing + join links), /api/me carries returnTo, Overview card sends them back once a wallet is linked, wallet link answers next=/api/my/polhunter, hand-off clears the cookie

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

public/assets/my.js

@@ -1404,7 +1404,21 @@
       }));
     } catch (e) {}
   }
+  // came from PolHunter (iap.return cookie): one card at the top of the Overview that sends them back
+  async function loadReturnCard() {
+    const card = $('phReturn'); if (!card) return;
+    try {
+      const me = await (await fetch('/api/me')).json();
+      if (me.returnTo !== 'polhunter') { card.hidden = true; return; }
+      card.hidden = false;
+      card.innerHTML = '<div class="card-head"><h3>You came from PolHunter</h3></div>' + (me.address
+        ? '<p>Your wallet is linked, so your board is ready.</p><a class="btn" href="/api/my/polhunter">Back to PolHunter</a>'
+        : '<p>One step left: link the wallet your POL drips will be paid to. The moment it is linked you go straight back.</p><button class="btn" type="button" id="phGoWallet">Link my wallet</button>');
+      const b = $('phGoWallet'); if (b) b.addEventListener('click', () => { const m = document.querySelector('.bo-menu [data-pane="wallet"]'); if (m) m.click(); });
+    } catch (e) {}
+  }
   async function loadCoach() {
+    loadReturnCard();
     loadTank();
     try {
       const r = await (await fetch('/api/my/coach')).json();
@@ -2383,7 +2397,8 @@
   }));
   $('linkBtn').addEventListener('click', busy($('linkBtn'), async () => {
     IAP.status('Check your wallet for the free link signature…');
-    await IAPWallet.signIn(); // server binds the wallet to the signed-in email account
+    const lr = await IAPWallet.signIn(); // server binds the wallet to the signed-in email account
+    if (lr && lr.next) { IAP.status('Wallet linked. Taking you back to PolHunter…', 'ok'); setTimeout(() => { location.href = lr.next; }, 700); return; } // they came from PolHunter: close the loop
     IAP.status('Wallet linked. Earnings pay there from now on.', 'ok');
     await render();
   }));