fix: support submenu item title

[biubiukam]

What changed

• Preserve items[].title for submenu items as itemTitle while keeping label as rendered submenu content.
• Use itemTitle for the submenu title DOM attribute when present.
• Add a regression test for submenu items with different label and title.

Why

In the items conversion path, submenu items spread rest props and then set title={label}. That overwrote a configured title, so downstream consumers could not distinguish display label from native title text.

Related

• fix: support title in submenu items ant-design/ant-design#58387

Validation

• npm run lint (0 errors, existing warnings)
• ./node_modules/.bin/tsc --noEmit --pretty false
• ./node_modules/.bin/prettier --check src/SubMenu/index.tsx src/interface.ts src/utils/nodeUtil.tsx tests/Options.spec.tsx
• npm test -- --runInBand
• npm run coverage -- --runInBand
• npm run compile

[biubiukam]

close ant-design/ant-design#48850

[gemini-code-assist]

Code Review

This pull request introduces support for a custom title property on submenus (SubMenuType), allowing users to specify a native HTML title attribute for submenus without overriding the display label. This is achieved by introducing an itemTitle prop to SubMenuProps and resolving it in the DOM element's title attribute. A corresponding unit test has been added to verify this behavior. There are no review comments, so I have no feedback to provide.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.72%. Comparing base (9c994fc) to head (82574f0).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #868   +/-   ##
=======================================
  Coverage   99.72%   99.72%           
=======================================
  Files          26       26           
  Lines         732      734    +2     
  Branches      204      205    +1     
=======================================
+ Hits          730      732    +2     
  Misses          2        2           

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[biubiukam]

@MadCcc 这个 PR 是否需要调整呢