typescript: replace unknown & any with SliderRef

[li-jia-nan]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	typescript: replace unknown & any with SliderRef
🇨🇳 Chinese	删除 unknown 和 any 类型，用 SliderRef 代替

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

---

🚀 Summary

🤖 Generated by Copilot at fe031f5

This pull request fixes some type mismatches and removes unnecessary assertions in the Slider component. It aligns the ref and step types with the underlying RcSlider component and avoids using ! to assert non-null values. This makes the code more consistent and reliable.

🔍 Walkthrough

🤖 Generated by Copilot at fe031f5

• Add SliderRef type to ref parameter of Slider component to improve type safety and readability (link, link)
• Remove non-null assertion operator from step prop of RcSlider component to avoid potential errors and confusion (link)

[github-actions]

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	384.34 KB (+17 B 🔺)
./dist/antd-with-locales.min.js	443.58 KB (+15 B 🔺)

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (4460ff4) 99.99% compared to head (fe031f5) 99.99%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #42420   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files         640      640           
  Lines       10840    10839    -1     
  Branches     2944     2944           
=======================================
- Hits        10839    10838    -1     
  Misses          1        1           

Impacted Files	Coverage Δ
components/slider/index.tsx	100.00% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.