Member area: loading spinner instead of flashing the sign-in card

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

public/assets/my.js

@@ -486,7 +486,10 @@
     document.getElementById('memberArea').classList.toggle('side-open'));
 
   async function render() {
-    const me = await IAP.refreshNavWallet();
+    // while /api/me answers, show a spinner instead of flashing the sign-in card at a signed-in member
+    let me = null;
+    try { me = await IAP.refreshNavWallet(); } catch (e) { me = null; }
+    if ($('bootSpin')) $('bootSpin').hidden = true;
     // one way in: email. A wallet-only session (no account) is sent back to the
     // email card with a finish-setup note; verifying the code links that wallet.
     const walletOnly = !!(me && me.signedIn && !me.email);

public/assets/site.css

@@ -210,6 +210,9 @@ tr:last-child td{border-bottom:0}
 .spend-banner .sub{color:var(--ink);font-size:15px}
 .spend-banner .rates{display:flex;gap:8px 18px;flex-wrap:wrap;justify-content:center;margin-top:12px;font-size:12.5px;color:var(--muted)}
 .spend-banner .rates b{color:var(--ink)}
+.boot-spin{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;min-height:60vh}
+.boot-spin .ring{width:46px;height:46px;border-radius:50%;border:4px solid rgba(67,232,195,.18);border-top-color:var(--mint);animation:bootspin .9s linear infinite}
+@keyframes bootspin{to{transform:rotate(360deg)}}
 .done-big{display:flex;flex-direction:column;align-items:center;gap:6px;padding:26px 16px;text-align:center}
 .done-big .tick{width:84px;height:84px;border-radius:50%;display:grid;place-items:center;font-size:48px;font-weight:800;color:var(--mint-ink);background:var(--mint);box-shadow:0 0 0 10px rgba(67,232,195,.15),0 10px 30px rgba(67,232,195,.35)}
 .done-big b{font-family:var(--disp);font-size:22px;margin-top:8px}