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TREK/shared/src/budget
Maurice 9307025ed0 fix(costs): derive the final budget breakdown on the server, in the same cents
The three figures under a traveler's final budget came from the server, netted
in integer trip cents at the rate frozen on each expense. The rows listed under
them did not: both shells converted the expense list again with whatever live
rate they had, and with none loaded yet (first render, offline) the raw foreign
amount went out under the display currency's symbol. On any trip with a
foreign-currency expense the rows could not add up to the line above them.

The settlement response now carries the rows with the figure: `sources` on each
finalBudgets entry lists what the person fronted per expense, the recorded
transfers on their side and the open flows, in display cents. They are filled
by the same two loops that fill the totals, so an expense with no split members
stays out of them as it stays out of the ledger, and each list is spread over its
figure's already allocated cents with the same largest-remainder split, so the
sum is exact in every display currency. The shells print those cents and only
resolve names; the rows carry the sign of the line they sit under.
2026-09-12 17:33:15 +02:00
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