The workspace owner can no longer be removed by mistake

Team changes now protect the workspace's ownership for everyone, whether the change comes from the dashboard or from an API key with the Manage the team permission:

• The workspace owner's membership cannot be demoted or removed, by a co-owner, an admin, a key, or the owner themselves. To hand a workspace to someone else, contact support@last-price.ai.
• A change that would leave the workspace with no owner is refused, and that includes the last owner leaving or stepping down. Make another member an owner first.
• A member whose membership of the workspace is suspended can no longer manage its team, settings or keys, even with an owner or admin role. Members can still leave a workspace, except the workspace owner and the last remaining owner.

Owners still manage admins and members as before, and admins still cannot change owners or other admins.

When two people change each other's roles at the same moment, one of them used to see a server error. That request is now answered as a conflict that is safe to retry, and nothing is changed until it is sent again.