follow webhook redirect: parse response and open checkout URL

index.html

@@ -2417,7 +2417,7 @@
             }
 
             try {
-                await fetch(ORDER_WEBHOOK, {
+                const res = await fetch(ORDER_WEBHOOK, {
                     method: 'POST',
                     headers: { 'Content-Type': 'application/json' },
                     body: JSON.stringify({
@@ -2434,6 +2434,27 @@
                         utm_content: document.getElementById('utm_content').value || null,
                     }),
                 });
+
+                if (!res.ok) { console.error('Webhook error:', res.status); return; }
+
+                // Try to parse the response for a redirect URL
+                const ct = res.headers.get('content-type') || '';
+                let data;
+                if (ct.indexOf('json') !== -1) {
+                    data = await res.json();
+                } else {
+                    data = await res.text();
+                }
+
+                const checkoutUrl = (data && typeof data === 'object')
+                    ? (data.url || data.checkout_url || data.checkoutUrl || data.redirect || data.redirect_url)
+                    : null;
+
+                if (checkoutUrl && checkoutUrl.startsWith('http')) {
+                    window.open(checkoutUrl, '_blank');
+                } else if (typeof data === 'string' && data.startsWith('http')) {
+                    window.open(data, '_blank');
+                }
             } catch (err) {
                 console.error('Order webhook failed:', err);
             }