fix(empty): restore static image API and locale fallback

[dajiangjunok]

Summary

This PR is part of the component review effort for feat/vapor, focused on Empty.

Main fixes:

1. Restored static image API compatibility

   • Empty.PRESENTED_IMAGE_DEFAULT
   • Empty.PRESENTED_IMAGE_SIMPLE

2. Restored built-in image behavior

   • image now supports built-in Empty image components, not only URL strings
   • simple image now correctly applies ant-empty-small
   • default/simple images now correctly apply ant-empty-normal

3. Restored locale fallback behavior

   • default description now reads from ConfigProvider.locale.Empty.description
   • fallback text is aligned to No data

4. Fixed image rendering priority

   • image prop takes precedence over image slot, matching expected component behavior

5. Improved verification coverage

   • added tests for static image API
   • added tests for locale fallback
   • added tests for prop vs slot priority
   • updated snapshots after behavior fixes

Reviewed Areas

• API compatibility
• locale fallback
• built-in image behavior
• class/state mapping
• test coverage
• demo correctness

Validation

Passed:

npm --workspace @ant-design-vue/ui run test -- --run -u src/components/empty/__tests__/index.test.ts src/components/empty/__tests__/demo.test.ts

[tangjinzhou]

Review: fix(empty): restore static image API and locale fallback

Positive

• Good addition of Empty.PRESENTED_IMAGE_SIMPLE and Empty.PRESENTED_IMAGE_DEFAULT static APIs
• markRaw() for static image components avoids unnecessary reactivity
• Locale fallback via useConfigInject() aligns with other components
• description: false to hide description works correctly
• Good test coverage for all features

Must Fix (pushed)

1. emptyClass applied ant-empty-normal to default variant — This class sets .ant-empty-image { height: 40px } which clips the default 184x152 SVG. Fixed: ant-empty-normal now only applies when imageVariant === 'simple'. Test assertion updated accordingly.

Consider

• getImageVariant inspects VNode types from slots at runtime which is fragile. Consider only checking the image prop for variant markers and treating slots as 'custom'.
• filterEmpty utility in types.ts could live in @/utils/ for reuse across components.

Pushed fix in commit 705a9ae.