Make wallet disconnect not hang

AppKit's modal.disconnect() can stall on the WalletConnect relay (mobile),
leaving the Disconnect button spinning forever ("just loads and says
disconnect") and never reaching the reload. Race the disconnect against a
1.2s timeout, and fire-and-forget from the button with a guaranteed reload
that drops in-memory wallet state so the picker returns.

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

public/assets/wallet.js

@@ -186,7 +186,9 @@ window.IAPWallet = (function () {
   }
 
   async function disconnect() {
-    try { if (modal && modal.disconnect) await modal.disconnect(); } catch (e) {}
+    // AppKit's disconnect can hang on the WalletConnect relay (esp. mobile) —
+    // never block on it, so the UI can't get stuck "disconnecting".
+    try { if (modal && modal.disconnect) await Promise.race([modal.disconnect(), new Promise(r => setTimeout(r, 1200))]); } catch (e) {}
     provider = null;
     try { Object.keys(localStorage).forEach(k => { if (/wc@2|walletconnect|w3m|wcm|reown|wagmi|appkit/i.test(k)) localStorage.removeItem(k); }); } catch (e) {}
   }