fix(amazonq): Sync IDE windows for Amazon Q auth state and region profile selection

[opieter-aws]

Problem

The auth state and region profile selection is not sycned between different IDE windows

Solution

Auth state

• Add an ssoCacheWatcher to the LSP auth client, with hooks on onDidCreate and onDidDelete
• In the AuthUtil, add the following handlers:
  • onDidCreate: trigger a restore flow to fetch the latest auth state
  • onDidDelete: trigger a logout

Region profile

• Add a GlobalStatePoller util that polls the global state value every second, and call a handler if the value updates
• In RegionProfileManager add the poller for the region profile global state variable and add a handler that switches the profile

Testing

Screen.Recording.2025-05-15.at.13.06.26.mov

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[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
  • Confirm whether tests should be added or ensure the PR description explains why tests are not required.

[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
  • Confirm whether tests should be added or ensure the PR description explains why tests are not required.
• This pull request implements a feat or fix, so it must include a changelog entry (unless the fix is for an unreleased feature). Review the changelog guidelines.
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[hayemaxi]

Very nice. Does it work if you say, select the profile in the other window that you weren't using to log in?

[hayemaxi]

Do we need to poll every second? Maybe every 2 or 3 seconds?

[opieter-aws]

Do we need to poll every second? Maybe every 2 or 3 seconds?

The behavior gets awkward when you are logged out and log back in; the 'other' window will keep the region selector displayed until the sync. I can increase to 2 seconds, but I don't think we want to keep that state much longer

Very nice. Does it work if you say, select the profile in the other window that you weren't using to log in?

Yes it behaves the same!

[nkomonen-amazon]

One thing to note with this polling length. We should think of realistic user behaviors and if we set polling to 2-3 seconds, would they even notice it? Assuming they sign in or out on one IDE instance, it is low likelihood they are switching to the other IDE very quickly.

It is also unlikely that the user will select the profile in one window and then immediately switch to the other.

[hayemaxi]

One thing to note with this polling length. We should think of realistic user behaviors and if we set polling to 2-3 seconds, would they even notice it? Assuming they sign in or out on one IDE instance, it is low likelihood they are switching to the other IDE very quickly.

It is also unlikely that the user will select the profile in one window and then immediately switch to the other.

+1

No one is comparing how smooth the auth change is side-by-side.

[Will-ShaoHua]

thanks for this change, it's really nice. Maybe we should bring this to mainline as well

[opieter-aws]

Maybe we should bring this to mainline as well

We won't be adding features for auth to mainline for now, but instead prioritize releasing this branch with auth on LSP identity server