Don't leave the connect modal stuck when already connected

On click, AppKit's session hasn't always rehydrated yet, so currentAddress()
returned null and we popped the picker even for an already-connected wallet —
and nothing closed it, leaving it stuck on screen after a purchase. Wait briefly
for the existing session to rehydrate before opening the picker, and always
close the modal once we have an address.

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

public/assets/wallet.js

@@ -80,7 +80,13 @@ window.IAPWallet = (function () {
     const c = await IAP.getConfig();
     await initAppKit(c);
     let addr = currentAddress();
+    if (!addr) {
+      // give AppKit a moment to rehydrate an existing session before popping the
+      // picker — otherwise an already-connected wallet still gets the modal
+      for (let i = 0; i < 8 && !addr; i++) { await new Promise(r => setTimeout(r, 150)); addr = currentAddress(); }
+    }
     if (!addr) { try { await modal.open(); } catch (e) {} addr = await waitForConnection(180000); }
+    try { if (modal && modal.close) await modal.close(); } catch (e) {} // dismiss the picker once we're connected
     provider = await resolveProvider();
     await ensureChain(c).catch(() => {}); // AppKit already connects on the right network; switch is best-effort
     return addr;