Fix Discord webhook showing localhost instead of APP_DOMAIN

create_ticket_api.php was not including config/config.php, so
$GLOBALS['config'] was empty when UrlHelper::ticketUrl() checked
for APP_DOMAIN, causing it to fall back to localhost.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

create_ticket_api.php

@@ -49,6 +49,9 @@ if ($conn->connect_error) {
     exit;
 }
 
+// Load application config so UrlHelper can resolve APP_DOMAIN
+require_once __DIR__ . '/config/config.php';
+
 // Authenticate via API key
 require_once __DIR__ . '/middleware/ApiKeyAuth.php';
 require_once __DIR__ . '/models/AuditLogModel.php';