fix: dropdown submenu arrow wrong direction in rtl

[yellowryan]

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
• ⏩ Workflow
• ❓ Other (about what?)

🔗 Related Issues

related to #52882

💡 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

• Read Keep a Changelog like a cat tracks a laser pointer.
• Describe the impact of the changes on developers, not the solution approach.
• Reference: https://ant.design/changelog

Language	Changelog
🇺🇸 English	fixed wrong direction of dropdown multi-level menu arrow in rtl
🇨🇳 Chinese	修复dropdown多级菜单箭头在 rtl 中方向错误

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[github-actions]

👁 Visual Regression Report for PR #52885 Passed ✅

🎯 Target branch: master (d5d9a36)
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📖 Alternative Report ↗︎

🎊 Congrats! No visual-regression diff found.

[github-actions]

[petercat-assistant]

Walkthrough

This pull request addresses a bug fix for the dropdown component in RTL (Right-to-Left) mode. It corrects the direction of the submenu arrow, ensuring it points in the correct direction when RTL is enabled.

Changes

File	Summary
components/dropdown/dropdown.tsx	Updated import to include LeftOutlined icon. Modified logic to conditionally render LeftOutlined or RightOutlined based on the direction prop, ensuring correct arrow direction in RTL mode.

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npm i https://pkg.pr.new/ant-design/ant-design/antd@52885

commit: 5e9da38

[codecov]

Bundle Report

Changes will increase total bundle size by 144 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
antd.min-array-push	3.38MB	144 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: antd.min-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
antd-with-locales.min.js	72 bytes	1.84MB	0.0%
antd.min.js	72 bytes	1.54MB	0.0%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d5d9a36) to head (5e9da38).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #52885   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          768       768           
  Lines        13847     13849    +2     
  Branches      3629      3631    +2     
=========================================
+ Hits         13847     13849    +2     

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