Cards are titled by the account name with the position on its own line:
owes you, you owe, settled, and paid back more than borrowed when a debt
crossed zero against its direction, so one account per person covers
both directions. Actions read Record repayment, Lend more, Pay back,
Borrow more and Offset against another debt, which says what it moves.
No more friends in the copy; the dashboard box is Debts.
