fix bugs phase 2 (excel ) , download sample feature

Co-authored-by: Copilot <copilot@github.com>

apps/dashboard/app/(authenticated)/sales/vehicles/page.tsx

@@ -6,6 +6,7 @@ import { ColumnHeader } from '@/shared/data-view/table-view'
 import FormDialog from '@/shared/components/form-dialog'
 import { ImportDataButton } from '@/shared/components/import-data-button'
 import { ExportDataButton } from '@/shared/components/export-data-button'
+import { DownloadSampleButton } from '@/shared/components/download-sample-button'
 import { useAuthApi } from '@/shared/useApi'
 import { VehicleForm } from '@/modules/vehicles/vehicle-form'
 import { VEHICLE_ROUTES } from '@garage/api'
@@ -24,6 +25,10 @@ export default function VehiclesPage() {
             headerProps={({ selectedItem, invalidateQuery }) => ({
                 actions: (
                     <div className='flex items-center gap-2'>
+                        <DownloadSampleButton
+                            onDownload={() => api.vehicles.downloadImportSample()}
+                            fileName='vehicles-import-sample'
+                        />
                         <ImportDataButton
                             onImport={(file) => api.vehicles.importData(file)}
                             onSuccess={invalidateQuery}