A client's record in the Business app gained a full Billing tab, matching what
staff already do on the web client page.

Saved cards: staff can see a client's saved cards, charge one for an ad-hoc
amount (a phone payment, a materials fee), set or clear the default card, and
remove a card. Charging shows the venue's currency and VAT, and staff pick
which accounting category the sale belongs to.

Pending fees: late-cancellation and no-show fees a client hasn't paid yet now
show on their record, newest first. Staff can collect one from the card on
file, record it as collected another way (cash, bank transfer, MobilePay, a
card terminal), or waive it with an optional note.

Failed payments now show on the client's own record, not only the venue-wide
list. Staff pick which saved card to retry with, record the payment as
collected outside the app, or waive it — the same choices as the web.

When a refund went out that should not have, staff can mint a one-time link the
client uses to pay it back. Nothing is sent automatically — staff copy the link
and share it themselves, exactly as on the web.

Recurring product subscriptions — lockers, equipment rentals and similar — now
show on a client's Billing tab, with the same cancel choice as the web: stop at
the end of the paid period, or end it right away.

Payment history can now be narrowed by status and by date range, and the
totals shown match the filtered range exactly rather than a rough estimate
from the most recent rows.

None of these actions contact the client automatically. Staff who want to tell
someone about a charge send a receipt afterwards as a separate, explicit step.

Cancelling a refund that is still pending stays a web-only action for now — it
requires the two-factor check the Business app cannot yet perform, so staff are
pointed to the web admin for that one case.