test(app-shell): PackageFormDialog validationTiming awaits the lazy studio zh catalogue

The zh-CN cases read `getByLabelText(/软件包 ID/)` right after the form
renders; that label is `engine.packages.create.id`, a row of the lazy
`studio` i18n namespace since the package/form/editor strings moved
there. Load the zh catalogue at module scope, the shape the other
studio-namespace zh tests in app-shell use.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsR2jVTqmjzhQU2Rqq79mu

Author: claude

ui/packages/app-shell/src/views/metadata-admin/PackageFormDialog.validationTiming.test.tsx

@@ -20,6 +20,12 @@ import * as React from 'react';
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import { render, screen, fireEvent, waitFor } from '@testing-library/react';
 import { PackageFormDialog } from './PackageFormDialog';
+// The form's field labels (`engine.packages.create.*`) live in `@object-ui/i18n`'s
+// `studio` namespace, whose `zh` catalogue is fetched on demand. Resident before
+// any case, so `getByLabelText(/软件包 ID/)` reads the zh label, never the en
+// fallback while the chunk is in flight (objectstack#26863).
+import { loadStudioCatalogue } from '@object-ui/i18n/namespaces/studio';
+await loadStudioCatalogue('zh');
 
 let localeFixture: 'en-US' | 'zh-CN' = 'zh-CN';
 vi.mock('./i18n', async (importOriginal) => ({