Working an order
Tapping a pending order opens it with the same actions the official app offers, bar one: accept, cancel, cancel and refund, set as fraud, and back to pending. Each runs through the documented WHMCS order API, so it does exactly what the same button in the admin area does, and the buttons that do not apply to an order in its current state are disabled rather than hidden, so the screen looks the same each time. The one action left out is delete. Deleting an order strips its services, domains and invoices and cannot be undone from anywhere, which is not a thing that should sit under a single tap on a phone. It stays in the WHMCS admin area, on purpose.