When a client has a partially paid or unpaid invoice, there's currently no visible indicator anywhere in the contact profile or when booking a new appointment. Staff have to manually check invoice history to know if someone owes money, which is easy to miss, especially in small service businesses (clinics, salons, studios) where payment often happens in person after the invoice is created.

Suggested solution: show a persistent banner or badge on the contact profile (and ideally on the booking/calendar screen) when a contact has any unpaid or partially paid invoice, similar to how a subscription-overdue banner might work at the account level. This would let staff catch outstanding balances before or during the next visit, instead of discovering it later or not at all.

This would be especially valuable for businesses that bill per-visit rather than through recurring subscriptions.