Add missing fields to form initial state

- Add internalWONumber, po, tt to initial formData
- Fixes "Edit Work Order undefined" header and null PO/TT inputs

src/pages/workorders/form/WorkOrderFormPage.js

@@ -12,6 +12,7 @@ export default function WorkOrderFormPage() {
   const isEdit = !!id;
 
   const [formData, setFormData] = useState({
+    internalWONumber: "",
     workOrderNumber: "",
     title: "",
     locationId: "",
@@ -21,6 +22,8 @@ export default function WorkOrderFormPage() {
     dueDate: "",
     assignedTo: "",
     description: "",
+    po: "",
+    tt: "",
   });
 
   const [loading, setLoading] = useState(false);