Per decision: keep dashboard revenue windows on pure cash basis (recognise
by paid_at for ALL invoices) and give the admin control over paid_at.
- adminDashboard: revert the imported-vs-native split; winSum is paid_at >=
cutoff for every paid invoice again (clean cash basis).
- BillDetailPage mark-paid dialog: add an optional 'Payment date' field
(LocalizedDateInput, defaults to today) so a payment can be backdated to
when it actually arrived. Backend already accepted paidAt end-to-end
(route validator + markPaid service + payment-log) — only the UI was
missing. EN/DE 'bills.payment.date' added.
This fixes the collapsed 30=90=365 windows (they were collapsing because
many invoices were marked paid in one session, all stamped 'now').
Luca
82ec23824a