// New function to use direct HeyGen API
        function useDirectHeyGenAPI() {
            document.getElementById('serverUrl').value = '';
            app.serverUrl = '';
            alert('✅ Cleared server URL.\n\nThe app will now use the direct HeyGen API.\n\nNote: This will likely fail due to CORS. Use your backend server URL instead.');
        }

        // Quick setup function for metahumans.one backend
        function setupMetaHumansBackend() {
            const backendUrl = 'https://metahumans.one/api';
            document.getElementById('serverUrl').value = backendUrl;
            app.serverUrl = backendUrl;
            alert(`✅ Configured backend URL: ${backendUrl}\n\nClick "Test Connection" to verify your backend endpoints.`);
        }