👥 Let Customers Invite Their Own Team

My product only supports one user per account and customers keep asking to add their colleagues. Build me team account management. An account can have several users, one of whom is the account owner. The owner invites people by email, sees who has accepted, and can remove them. Inside an account, set roles such as owner, administrator and member, where only the owner and administrators can change billing or invite people, and members simply use the product. The number of seats allowed comes from the plan record, and the owner sees seats used against seats available with a clear way to add more. Support transferring ownership to another user, because an owner leaving should not lock a whole company out. Make sure a user in one account can never see another account data, and let me test that with a second account. Add an AI agent that tells me which accounts are at their seat limit, which have invited people who never accepted, and which have a single user who has not signed in recently. Automate the invite and reminder emails, and a scheduled monthly report on seat utilization. Two logins: an account owner who manages their team, and me as the product owner.