Add Yoco processing fee tracking to payments, settings, and reports

Estimates and snapshots the Yoco card-processing fee (always church-borne)
on every card payment, lets the admin configure in-person/online fee % per
plan in Settings -> Payments, and surfaces the fee alongside gross revenue
across the Finance/Profit reports, Master Orders, Revenue Detailed, and the
full cashup reconciliation flow (close-out screen, Cashup report, and audit
trail) so payout figures match what actually lands in the bank.

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project follows [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+- Yoco processing fee tracking: Settings → Payments lets you pick your Yoco plan (Core/Plus/Pro) to pre-fill estimated in-person and online fee percentages, both freely editable. The church always absorbs this fee — it's never added to what attendees pay.
+- Every card payment now snapshots its estimated Yoco fee at the time it's recorded, so later changes to the settings don't retroactively alter historical reports.
+- Finance report, Profit report, Master Orders, and Revenue Detailed (including their CSV/PDF/email exports) now show the estimated Yoco fee and a "net after fees" figure alongside gross revenue, so the numbers reflect what actually lands in the bank.
+- Cashup reconciliation (the per-event close-out screen, the Cashup report, and the Cashup Audit Trail) now shows three figures for the card method: expected before Yoco fees, the fee itself, and expected after fees — plus overall Yoco fees and net-profit-after-fees totals — so counts reconcile against what actually settles from Yoco rather than the gross card total.
+
 ## [1.3.0] - 2026-07-27
 
 ### Added