Wall page: InstantAdPay headline + POL on Polygon; payouts-in-POL copy on join/home/Wallet/objections/chatbot

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

public/assets/wall.js

@@ -7,6 +7,7 @@
   let w = null;
   try { w = await (await fetch('/api/wall/' + encodeURIComponent(name))).json(); } catch (e) {}
   const title = IAP.$('wallTitle');
+  const hostEl = IAP.$('wallHost');
   if (!w || w.error) {
     title.textContent = 'No wall under that name.';
     IAP.$('wallJoin').href = '/my';
@@ -14,6 +15,7 @@
   }
   const safeName = String(w.name).replace(/[&<>]/g, '');
   title.innerHTML = safeName;
+  if (hostEl) hostEl.innerHTML = safeName;
   IAP.$('bioHead').hidden = false;
   if (w.avatarUrl) { const av = IAP.$('bioAvatar'); av.src = w.avatarUrl; av.hidden = false; }
   if (w.badge) { const bb = IAP.$('bioBadge'); if (bb) { bb.src = w.badge.img; bb.title = w.badge.label + ' badge'; bb.hidden = false; } }