[Suggestion]: Add Collapse Feature for Left-Side Menu

Summary

The left-side navigation menu in the React official documentation currently lacks a collapse feature. When navigating through long lists, users have to scroll to the bottom to access other sections. This can be inconvenient, especially when switching between categories such as “Hook” or “Components”.

Page

No response

Details

Proposal:
Add a collapse/expand functionality for the left-side navigation menu. This would allow users to collapse currently opened sections and easily navigate to other sections without extensive scrolling.

Additional Information:
I would be happy to contribute to this feature and submit a pull request to implement the collapse functionality. Please let me know if this is something the team is open to, and I can start working on it.

Thank you for considering this feature request!

首先定位 React 文件網站左側導覽的實作，並檢視 Hooks 和 Components 等區段是如何渲染的。決定目前已開啟區段的收合與展開應如何運作，然後驗證使用者無需大量捲動即可存取其他區段。該 issue 未指出任何檔案或測試，因此必須先找到相關進入點。