Selecting a search result doesn’t update the main navigation with the new page

[sevenseacat]

Brief Description

Before the sidebar rewrite, I think this worked correctly - the nav would change and any necessary nodes would be expanded to show the node for the new page.

Steps to reproduce the bug

• open https://ash-hq.org/docs/guides/ash/latest/tutorials/get-started (or any page on AshHQ)
• that page (eg. Getting Started) will be marked as active in left navigation
• open search modal and search for something else (eg. changeset)
• select the first search result for Ash.Changeset
• page URL updates to https://ash-hq.org/docs/module/ash/latest/ash-changeset
• but “Getting Started” is still marked as active in left navigation