fix: check if element of popover exists when delayed hidden

[winjo]

Types

• 🐛 Bug Fixes

Background or solution

🤖 Generated by Copilot at 0cb6734

• Add a null check for contentEl.current to avoid errors when the popover is unmounted (link)

Changelog

🤖 Generated by Copilot at 0cb6734

Fix a potential error in Popover component when unmounting. Add a null check for contentEl.current in hideContent function.

[opensumi]

ChatGPT Code Review:

1. 建议修改：无。
2. 代码功能：修复了一个问题，当 Popover 组件进行延迟隐藏时，增加了检查是否存在该组件的判断，防止组件已销毁但依然被访问的情况。

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (20e3b5b) 57.72% compared to head (0cb6734) 57.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2764      +/-   ##
==========================================
- Coverage   57.72%   57.72%   -0.01%     
==========================================
  Files        1327     1327              
  Lines       83582    83583       +1     
  Branches    17379    17379              
==========================================
  Hits        48246    48246              
- Misses      32115    32116       +1     
  Partials     3221     3221              

Flag	Coverage Δ
jsdom	52.72% <ø> (-0.01%)	⬇️
node	16.79% <ø> (-0.01%)	⬇️

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see 1 file with indirect coverage changes

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