SidebarItem loses active state when navigating between pages #88

What's wrong

When navigating between pages using the sidebar, if the target sidebar item is outside the currently visible area, the sidebar resets its entire state instead of focusing/scrolling the active SidebarItem into view.

Interestingly, this only happens during client-side navigation. The sidebar behaves correctly when the URL is opened in a new tab or when the link is opened normally.

Reproduction

1. Scroll the sidebar so that the target SidebarItem is outside the visible area.
2. Click a sidebar link to navigate to that page.
3. Observe that the sidebar resets its state instead of scrolling the active SidebarItem into view.

Environment

nimbus-docs official website

Proposed fix (optional)

Cases that work correctly. The sidebar correctly focuses the active SidebarItem when:

1. Copying the URL and opening it in a new tab.
2. Opening the link normally.
3. Loading the page directly.

There should be some logic here to trigger it again or handle the transition.