[YW-360] Upgrade the test coverage

[sherryy021229-sys]

upgrade the test coverage

[Copilot]

Pull Request Overview

This PR upgrades test coverage across multiple admin pages and components by adding new test cases, removing placeholder tests, and improving test implementation quality. The changes focus on enhancing coverage for user management, yuan statistics, category management, novels moderation, and various hooks.

Key changes:

• Added comprehensive test coverage for readers page filters, pagination, and bulk actions
• Enhanced yuan and yuan statistics tests with totals computation, mixed data shapes, and navigation scenarios
• Expanded category form and index tests with validation, error handling, and custom actions
• Improved novels moderation tests covering action flows, loading states, and error scenarios
• Added extensive coverage for useSearch and useExport hooks
• Removed placeholder/dummy test files across multiple modules

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/pages/admin/yuan/yuanstatistics.test.jsx	Added tests for header/navigation, totals computation, mixed data shapes, and table pagination
src/pages/admin/yuan/test.jsx	Removed placeholder test file
src/pages/admin/yuan/index.test.jsx	Removed duplicate header tests, added tests for mixed response shapes and row keys
src/pages/admin/users/writers-columns.test.jsx	Removed unused imports and join date column test
src/pages/admin/users/readers.test.jsx	Enhanced mock interactivity, added comprehensive filter/pagination/bulk action tests
src/pages/admin/users/readers-columns.test.jsx	Removed unused imports and join date column test
src/pages/admin/settings/test.jsx	Removed placeholder test file
src/pages/admin/novels/test.jsx	Removed placeholder test file
src/pages/admin/novels/moderate.test.jsx	Improved table mock to render columns, added action coverage tests
src/pages/admin/library/test.jsx	Removed placeholder test file
src/pages/admin/dashboard/test.jsx	Removed placeholder test file
src/pages/admin/comments/test.jsx	Removed placeholder test file
src/pages/admin/chapters/test.jsx	Removed placeholder test file
src/pages/admin/categories/test.jsx	Removed placeholder test file
src/pages/admin/categories/index.test.jsx	Added tests for custom navigation actions and toggle status error handling
src/pages/admin/categories/categoryform.test.jsx	Comprehensive rewrite with validation, loading states, and error scenarios
src/pages/admin/categories/categories.test.jsx	Removed placeholder test file
src/index.test.js	Added mocks for react-dom/client, antd, and App component
src/hooks/admin/usesearch.test.js	Added extensive coverage for search flow, history, suggestions, filtering, and utilities
src/hooks/admin/useexport.test.js	Complete rewrite with end-to-end tests for converters, download, and export flows
src/components/admin/modals/editmodal.test.jsx	Enhanced validation failure test with console.error spy
src/App.test.js	Added comprehensive routing tests for all admin pages

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