🪟 🎉 Verify auth status on tab focus

[teallarson]

What

Closes airbytehq/airbyte-cloud#3735 and airbytehq/airbyte-cloud#3992

Previously, a user could have two tabs open, logout in one, and could still click in the UI in their other (now out of date) tab and eventually see a vague/ominous "You do not have permissions" error.

Now, they are simply redirected to login upon tab focus.

How

Adds a useEffect() with a focus listener to our AuthService that watches for auth status changes whenever the window gains focus.

[josephkmh]

Nice solution - works well!

Just noticed while I was testing that we have a similar problem when logging in. If you have two tabs open to the login (or signup) page, then authenticate in one of them, the other one would ideally also automatically log you in. One more thing we could add is a similar mechanism in src/packages/cloud/views/auth/Auth.tsx to redirect users from unauthenticated routes (login, signup) to the authenticated routes.

I just created another ticket for the login issue: https://github.com/airbytehq/airbyte-cloud/issues/3992

[teallarson]

@josephkmh that turned out to be fairly trivial to support in this PR as well, and falls under the category "verifying auth on tab focus" so I threw it in here.

I also adjusted the logic for the redirect URL so this flow also redirects users to the page they came from when logged back in.