   const walletData = JSON.parse(savedWallet);
                if (walletData && walletData.address) {
                    // Auto-sign in returning users
                    currentUser = walletData;
                    currentWallet = walletData;
                    showUserInfo();
                    updateWalletDisplay();
                    
                    // Show appropriate welcome message
                    let welcomeMsg = `Welcome back ${currentUser.address.substring(0, 15)}...!`;
          