gnubok_create_supplier_invoice_from_inbox sourced the invoice's header
vat_amount from the OCR-extracted totals.vat field instead of summing
the per-line vat_amount values. That header field is never reconciled
with the line items, so per-line VAT customization (or a mis-extracted
document total) could leave it at a stale or zero value.
createSupplierInvoiceRegistrationEntry (and the cash/privately-paid
variants) then gated the entire 2641 ingående moms posting on
invoice.vat_amount > 0, so a stale header silently suppressed a
correct per-line VAT split with no error. Confirmed via the ledger:
this exact defect hit Glesys 623884, DNB 9664449205, and ComputerSalg
500265968 (all already manually corrected via storno+correction).
Fix: derive vat_amount from summed lineItems in the MCP tool, and
switch the three registration-entry gates from the header field to
itemsHaveVat(items), so the engine itself can no longer be fooled by
an unreconciled aggregate regardless of which caller populates it.
Signed-off-by: Jonas Flodén <jonas@floden.nu>
Co-authored-by: Jakob Wennberg <jakob.wennberg@gmail.com>
