Team Invites + Role Management

Build a team settings page where an owner can invite users, view pending invites, accept invites, and manage roles.

Requirements

1. 01Normalize invite email addresses and allow only one active pending invite per team and email.
2. 02List members and pending invites with their current role and lifecycle status.
3. 03Accept only a valid, unexpired invite token once; cancelled, replaced, or already-used tokens must fail safely.
4. 04Authorize role changes and prevent removing or demoting the team's last owner.
5. 05Cancel or resend an invite, invalidating any token that it replaces, and confirm destructive actions.

Constraints

• • Submit one compact engineering spec, not implementation code.
• • The generated artifact must use the declared Next.js 16 adapter.
• • Scoring rewards observable behavior and prompt efficiency, not runtime.