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* feat(vat): book the momsrapport as an editable settlement verifikat (#980) Adds a "Bokfor momsrapporten" card under the VAT declaration that builds an editable verifikat proposal from the report and books it through the ordinary journal entry form: - lib/reports/vat-settlement.ts: proposal builder. Clears each 26xx account at exact ore, books the net on 2650 (att betala) or 1650 (att aterfa) at the filed whole-krona amount (buildFiledAmounts, oretal faller bort per SFL 22 kap 1 par), balances the gap on 3740. Surfaces existing vat_settlement entries in the period so the UI can warn before a double booking. - GET /api/reports/vat-declaration/settlement-proposal: same period params as the sibling report routes. - VatBookingCard (reports view): fetches the proposal, warns when the period already has a posted settlement or draft, and opens the JournalEntryForm (bare, prefilled, source_type vat_settlement) in a dialog so every line is editable before committing. Booking uses the existing engine path: balance validation, period locks, voucher series per source type. - vat_settlement entries are excluded from the declaration projection (calculateVatDeclaration via new shared fetchVatAccountTotals, and the MCP computeVatReport for parity): a pure-projection report would otherwise read zero, and a later Skatteverket submission would file zeros, the moment the settlement is booked. No migration needed: the vat_settlement source type shipped in 20260708100000. Closes #980 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(vat): block re-booking a settled period, fail loud on lookup errors (CodeRabbit) The proposal is not delta-aware (it re-clears the FULL period), so a second booking while a posted settlement exists would corrupt the 26xx balances: disable "Skapa verifikat" until that verifikat is annulled (storno restores the balances). And since the existing-settlement lookup now gates that button, a swallowed query error would silently re-enable it: throw instead. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>