Meeting room / resource booking

Build an internal tool for booking meeting rooms or shared resources.

Core features:
1. Grid view of rooms x time
2. Book, edit, cancel with conflict prevention
3. Recurring bookings
4. Admin: add rooms, set opening hours, blackout dates
5. Usage report per room per week

Data: rooms, bookings, users.
Must-haves: SSO or org-only auth, RLS by workspace.