Fix jwt-token

client/src/pages/Alerts.jsx

@@ -497,6 +497,7 @@ const CreateAlertRuleModal = ({ onClose, onSave }) => {
       const payload = { ...formData };
       
       // Clean up empty values
+      if (!payload.description || payload.description.trim() === '') delete payload.description;
       if (!payload.min_rssi) delete payload.min_rssi;
       if (!payload.max_rssi) delete payload.max_rssi;
       if (!payload.device_ids || payload.device_ids.length === 0) payload.device_ids = null;