fix: add aria-labelledby to checkbox for better a11y

[aojunhao123]

修一下antd那边挂掉的a11y test case。主要是在这个pr里把checkbox的aria-label给去掉了，但是发现这个其实不能去掉。因为checkbox需要提供文本内容给读屏器播报，使用aria-labelledby来解。测了一下不会重复播报，antd那边测试也没问题

Summary by CodeRabbit

发布说明

• 无障碍访问改进

  • 增强了树节点组件的屏幕阅读器支持，提升了键盘导航和屏幕阅读器用户的体验。

• 代码优化

  • 改进了内部代码组织结构，提高了代码整洁度和维护性。

_{✏️ Tip: You can customize this high-level summary in your review settings.}

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[gemini-code-assist]

Summary of Changes

Hello @aojunhao123, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly improves the accessibility of the tree component by implementing the aria-labelledby attribute on checkboxes. This change ensures that assistive technologies can correctly identify and announce the purpose of each checkbox, leading to a more navigable and understandable user interface for all users.

Highlights

• Accessibility Improvement: Added the aria-labelledby attribute to the checkbox element within the TreeNode component to explicitly associate it with its label, enhancing accessibility for screen readers.
• Node ID Refactoring: Relocated the generation of the nodeId to an earlier point in the TreeNode component's render cycle, ensuring it is available when the aria-labelledby attribute is set.
• Dependency Array Update: Modified the dependency array of the useMemo hook responsible for rendering the checkbox, replacing props.title with nodeId to ensure correct re-evaluation when the node identifier changes.
• Snapshot Test Updates: Updated existing snapshot tests in Tree.spec.tsx.snap and TreeProps.spec.tsx.snap to reflect the addition of the aria-labelledby attribute on checkbox elements.

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[coderabbitai]

演进说明

通过在 TreeNode 组件顶部计算 getTreeNodeId(treeId, eventKey) 来引入稳定的节点标识符，并在整个组件中重复使用，同时改进复选框的可访问性属性和依赖项管理。

变更概览

类型 / 文件	修改摘要
NodeId 稳定化和可访问性改进 src/TreeNode.tsx	将 nodeId 计算移至组件顶层，为复选框 span 添加 aria-labelledby={nodeId} 属性以增强无障碍访问性；更新 useMemo 依赖数组，将 props.title 替换为 nodeId；消除拖拽流程中重复的 nodeId 声明，实现单一定义的统一管理

估算代码审查工作量

🎯 2 (Simple) | ⏱️ ~10 minutes

可能相关的 PR

• fix: should generate standard id via useId #1003 — 两个 PR 都通过 getTreeNodeId(treeId, eventKey) 计算并使用稳定的 nodeId，直接相关联
• refactor: rewrite TreeNode CC => FC #905 — 两个 PR 都修改 src/TreeNode.tsx，涉及 TreeNode 组件的主要实现变更
• refactor: better a11y #1001 — 两个 PR 都修改 TreeNode 组件中的可访问性和 ID 处理（如复选框上的 aria 属性）

推荐审查人

• zombieJ
• afc163

兔子的贺诗

🐰 小节点换新妆，
ID 上移显端庄，
无障碍染新装，
一个定义闪闪亮！ ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题准确地反映了拉取请求的主要变更：向复选框添加aria-labelledby属性以改进可访问性。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.84%. Comparing base (177b147) to head (caa09ac).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1004   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files          14       14           
  Lines        1295     1295           
  Branches      396      396           
=======================================
  Hits         1293     1293           
  Misses          2        2           

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[gemini-code-assist]

Code Review

This pull request introduces aria-labelledby to the checkbox elements within the TreeNode component, significantly improving accessibility for users who rely on assistive technologies. The nodeId is correctly generated and used, and the useMemo dependency array has been updated to reflect this change. The refactoring of nodeId declaration to an earlier, more appropriate scope is also a good improvement.