feat(workshop): add vehicle from service order

- Added POST /pos/api/service-orders/vehicles endpoint for workshop.edit users.

- Added 'Nuevo vehiculo' modal in edit order with plate, VIN, make, model, year, color and owner.

- After creation the vehicle is automatically selected in the order.

pos/static/js/workshop.js

@@ -704,6 +704,51 @@ var Workshop = (function() {
         }
     }
 
+    function openNewVehicleModal() {
+        document.getElementById('newVehicleModal').classList.add('is-open');
+        document.getElementById('nvPlate').value = '';
+        document.getElementById('nvVIN').value = '';
+        document.getElementById('nvMake').value = '';
+        document.getElementById('nvModel').value = '';
+        document.getElementById('nvYear').value = '';
+        document.getElementById('nvColor').value = '';
+        document.getElementById('nvOwner').value = '';
+    }
+
+    function closeNewVehicleModal() {
+        document.getElementById('newVehicleModal').classList.remove('is-open');
+    }
+
+    async function saveNewVehicle() {
+        var plate = document.getElementById('nvPlate').value.trim();
+        var vin = document.getElementById('nvVIN').value.trim();
+        if (!plate && !vin) {
+            alert('Se requiere al menos placa o VIN');
+            return;
+        }
+        var payload = {
+            plate: plate,
+            vin: vin,
+            make: document.getElementById('nvMake').value.trim() || null,
+            model: document.getElementById('nvModel').value.trim() || null,
+            year: document.getElementById('nvYear').value ? parseInt(document.getElementById('nvYear').value, 10) : null,
+            color: document.getElementById('nvColor').value.trim() || null,
+            owner_name: document.getElementById('nvOwner').value.trim() || null,
+            branch_id: currentOrder ? currentOrder.branch_id : null
+        };
+        try {
+            var res = await api('POST', '/vehicles', payload);
+            var label = plate + (payload.make ? ' · ' + payload.make : '') + (payload.model ? ' ' + payload.model : '');
+            selectedEditVehicle = {id: res.id, label: label.trim()};
+            document.getElementById('eoVehicleSearch').value = selectedEditVehicle.label;
+            document.getElementById('eoVehicleId').value = res.id;
+            toast('Vehículo creado');
+            closeNewVehicleModal();
+        } catch (e) {
+            alert('Error: ' + e.message);
+        }
+    }
+
     // ─── Actions ───
 
     function changeStatus() {
@@ -1113,6 +1158,9 @@ var Workshop = (function() {
         selectEditVehicle: selectEditVehicle,
         searchCustomersForSO: searchCustomersForSO,
         searchVehiclesForSO: searchVehiclesForSO,
+        openNewVehicleModal: openNewVehicleModal,
+        closeNewVehicleModal: closeNewVehicleModal,
+        saveNewVehicle: saveNewVehicle,
     };
 })();