Technician payment collection against the work order for cash, check, and card in phase 1.
The storyboard makes this explicit: technicians need to be able to collect pre-payments in v1 even though invoicing stays in the back office. The payment flow therefore belongs directly on the work order so it stays close to the field execution path.
We still need to confirm how much financial detail from the work order should be visible to the technician on mobile. This prepayment view assumes the technician can see the payment amount, payment status, and the amount still due, but deeper financial detail may need a tighter role boundary.