fix: tree switch bg height

[zombieJ]

中文版模板 / Chinese template

🤔 This is a ...

• 🆕 New feature
• 🐞 Bug fix
• 📝 Site / documentation improvement
• 📽️ Demo improvement
• 💄 Component style improvement
• 🤖 TypeScript definition improvement
• 📦 Bundle size optimization
• ⚡️ Performance optimization
• ⭐️ Feature enhancement
• 🌐 Internationalization
• 🛠 Refactoring
• 🎨 Code style optimization
• ✅ Test Case
• 🔀 Branch merge
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🔗 Related Issues

fix #50255

💡 Background and Solution

• The specific problem to be addressed.
• List the final API implementation and usage if needed.
• If there are UI/interaction changes, consider providing screenshots or GIFs.

📝 Change Log

• Describe the impact of the changes on developers, not the solution approach.
• Reference: https://ant.design/changelog

Language	Changelog
🇺🇸 English	Fix Tree switcher position not ping at top when title break the line.
🇨🇳 Chinese	修复 Tree 展开按钮在标题折行时没有顶上对齐的问题。

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[github-actions]

[github-actions]

👁 Visual Regression Report for PR #50313 Passed ✅

🎯 Target branch: master (dd3bfae)
📖 View Full Report ↗︎

🎊 Congrats! No visual-regression diff found.

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	346.06 KB (+5 B 🔺)
./dist/antd-with-locales.min.js	396.92 KB (+84 B 🔺)

[pkg-pr-new]

commit: 454ae89

yarn add https://pkg.pr.new/ant-design/ant-design/antd@50313

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[crazyair]

像这个，就可以写 debug demo，截图，避免后续出现

[crazyair]

换行的会不会有问题

[zombieJ]

像这个，就可以写 debug demo，截图，避免后续出现

现在看也是这样子的，它是 hover 才能发现区别

[crazyair]

像这个，就可以写 debug demo，截图，避免后续出现

现在看也是这样子的，它是 hover 才能发现区别

这个 demo 不需要 hover 也能展示，就用这个 demo 加个 debug，防止后续出现

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (dd3bfae) to head (454ae89).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #50313   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          751       751           
  Lines        13139     13181   +42     
  Branches      3428      3449   +21     
=========================================
+ Hits         13139     13181   +42     

☔ View full report in Codecov by Sentry.
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[afc163]

不对，diff 有问题。

[crazyair]

不对，diff 有问题。

刚想说

[zombieJ]

不对，diff 有问题。

现在知道为什么需要拉长了

[zombieJ]

switch 本身需要划线，所以给 switch 加个伪类来实现 hover 包包的效果。