Single-scroll layout with two _SectionHeader-anchored blocks. Users
rows tap into AdminUserEditSheet. Invites row shows token (monospace)
with copy button, optional note, and a redeemed badge if applicable.
"Generate invite" opens a small dialog with an optional note field
(server hardcodes 24h TTL — admins can't customise expiry). On
success the new token is shown in a copy-once result dialog.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
