How do I archive a lease?

Toast "Archived <property>" with Undo. The lease leaves the active list and appears under Filters → Archive → Archived with an Archived badge. Its page is read-only: no Edit, and the only action is the lifecycle one.

A lease that's still in force can't be archived: "This lease is still active. End or terminate it first." This includes Active and Partially accepted leases and record-only leases still in force. End the lease first (Ending a lease chapter). Don't end a real tenancy just to tidy the list.