fix: simulate the touch event error

[xiaohuoni]

simulate the touch event error when the DOM is directly mounted on the body or HTML

🤔 这个变动的性质是？/ What is the nature of this change?

• 新特性提交 / New feature
• bug 修复 / Fix bug
• 样式优化 / Style optimization
• 代码风格优化 / Code style optimization
• 性能优化 / Performance optimization
• 构建优化 / Build optimization
• 网站、文档、Demo 改进 / Website, documentation, demo improvements
• 重构代码或样式 / Refactor code or style
• 测试相关 / Test related
• 其他 / Other

🔗 相关 Issue / Related Issue

Close: #996

💡 需求背景和解决方案 / Background or solution

📝 更新日志 / Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

[github-actions]

🎊 PR Preview has been successfully built and deployed to https://dumi-preview-pr-997.surge.sh

[github-actions]

🎊 PR Mobile Preview has been successfully built and deployed to https://dumi-mobile-preview-pr-997.surge.sh

[codecov]

Codecov Report

Merging #997 (0e4e310) into master (4c76f42) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #997   +/-   ##
=======================================
  Coverage   94.99%   94.99%           
=======================================
  Files         119      119           
  Lines        2919     2919           
  Branches      962      962           
=======================================
  Hits         2773     2773           
  Misses        142      142           
  Partials        4        4           

Impacted Files	Coverage Δ
packages/theme-mobile/src/layouts/demo.tsx	90.90% <100.00%> (ø)

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[PeachScript]

+1