feat(web): formulario de documentos de ventas y compras (cargar, crear, actualizar con If-Match, navegar)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

apps/api/src/sl/sl-resources.ts

@@ -69,6 +69,7 @@ export const SL_RESOURCES: readonly SlResource[] = [
   catalog('Warehouses', 'string'),
   catalog('Currencies', 'string'),
   catalog('SalesTaxCodes', 'string'),
+  catalog('PurchaseTaxCodes', 'string'),
   catalog('VatGroups', 'string'),
   catalog('PaymentTermsTypes', 'number'),
   catalog('SalesPersons', 'number'),