Redirect fails when already signed in

[camdendotlol]

Yesterday a student:

• opened FCS in a tab while logged out
• opened PS in a new tab
• signed into PS
• switched back to the FCS tab, which was still in a logged-out state because he had opened it prior to logging into PS
• clicked the “Sign in with Performant Studio” button, which sent him to https://performant.studio/#/?redirect_url=https%3A%2F%2Ffaircopy.performant.studio%2F
• PS did not redirect him back to FCS

This is an edge case where the FCS tab's login state is outdated. In a typical situation, FCS would see the Clerk cookie on load and authenticate the user without them having to follow the link to PS.

The redirect is currently handled by the Clerk package, so the fix would be to add some manual handling on the homepage that follows the redirect if the user is already signed in.