WalletConnect: add redirect metadata (return to dApp after wallet approvals)

Sets metadata.redirect so mobile wallets bounce the user back to /my after each
approval instead of stranding them in the wallet app.

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

public/assets/wallet.js

@@ -83,7 +83,9 @@ window.IAPWallet = (function () {
         projectId, optionalChains: [chainId], showQrModal: true,
         rpcMap: { [chainId]: c.rpc },
         metadata: { name: c.siteName || 'InstantAdPay', description: c.tagline || 'Advertise and earn, paid on-chain.',
-          url: location.origin, icons: [location.origin + '/logo-icon.png'] }
+          url: location.origin, icons: [location.origin + '/logo-icon.png'],
+          // ask the wallet to bounce back to the dashboard after each approval
+          redirect: { native: '', universal: location.origin + '/my' } }
       });
     }
     if (!wcProvider.session) await wcProvider.connect(); // QR on desktop, opens the wallet app on mobile