Ayush Anand Srivastava

test: add unit tests for Sidebar and useSidebar logic (#1652)

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### Contributor checklist - [x] This pull request is on a [separate branch](https://docs.github.com/en/get-started/quickstart/github-flow) and not the main branch - [x] I have run the tests for the backend and frontend...

Fix incorrect TypeVar default expansion order (Fixes #20336)

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This PR fixes how mypy handles generic classes with default type parameters when they refer to themselves inside the class body. It Fixes #20336 Before this change, if you wrote...