Trip expense roundup

The post-trip ritual: a phone full of receipt photos, a group chat full of 'I paid for the Airbnb,' and the slow realization that nobody has actually done the math. This bunch is the quickest path from chaos to settle-up. Receipts become a single tidy PDF; expenses become a clear ledger; the minimum-payment math runs automatically. Send the PDF to the group, send the Venmo amounts to the right people.