fix: 类型增强、代码优化

[li-jia-nan]

[中文版模板 / Chinese template]

🤔 This is a ...

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

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

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

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:white_check_mark: li-jia-nan
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