Integrate the provided sidebar component, ensuring it functions correctly on both desktop and mobile devices with automatic collapsing and expanding functionality.
Fixes an import error in `App.tsx` related to the `authStore`. The error message "Failed to resolve import "./stores/authStore" from "src/App.tsx". Does the file exist?" indicates that the specified module could not be found. This commit addresses the issue by ensuring the correct import path or by creating the missing file.
