fix(invoices): record manual and Stripe settlements in invoice_payments (#2236)

* fix(invoices): record manual and Stripe settlements in invoice_payments (#2019)

settleInvoicePayment created the payment voucher and flipped the invoice to
paid but never wrote the AR sub-ledger row. The kontantmetod bokslut cut-off
reads invoice_payments only (payment DATE, not remaining_amount), so a
manually settled invoice was booked again as a fordran with vilande moms at
year end, double-counting revenue and VAT. The same gap hid the payment from
the Betalningar view and from the voucher -> invoice reference map.

- Insert the row between voucher creation and the CAS status update, same
  shape as the bank-match path (amount in invoice currency, transaction_id
  null). An insert failure cancels the voucher and fails closed; both CAS
  failure branches remove the row together with the voucher.
- Backfill: scripts/backfill-invoice-payment-rows.ts (dry-run default) with
  a pure planner in lib/invoices/backfill-invoice-payment-rows.ts. Writes
  only where exactly one posted payment voucher exists; zero or several are
  reported, never guessed. Rows carry notes 'backfill:#2019' so one DELETE
  reverts a run. Executed on staging (10 rows); prod awaits explicit go.
- pg-real: transaction-less rows coexist under the tx/invoice unique index,
  the je/invoice index still refuses a double link, and the authenticated
  writer can delete its own row (the CAS-failure path depends on it).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* fix(invoices): write the payment row from every mark-paid path and harden the backfill

Skeptic and review round on #2236 (issue #2019):

- One helper (lib/invoices/invoice-payment-row.ts) now writes the
  invoice_payments row for all four transaction-less settlement paths:
  dashboard mark-paid and Stripe via settleInvoicePayment, plus the MCP
  mark_invoice_paid commit and the v1 mark-paid route, which booked their
  own voucher and never wrote the row. Amount = applied amount (new
  paid_amount minus prior), not cash received, so a 3740 öre absorption
  never yields a negative fordran in the cut-off or a wrong storno restore.
- The two duplicate detectors no longer treat a payment row with
  transaction_id NULL as "reconciled to a bank line": the bank line for a
  manual settlement arrives later and the voucher must stay a twin.
- Backfill: payment_date from the voucher entry_date (paid_at was
  wall-clock before #1332); refuse rows that disagree with the voucher's
  1510 credit / settlement debit; report partially covered invoices
  (rows_short) instead of patching; record each executed run in
  behandlingshistorik (InvoicePaymentRowBackfilled, migration
  20260903180000). Re-run end to end on staging: 10 rows, 10 events.
- Typecheck ratchet: cast in the cut-off test.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* fix(invoices): use roundOre in the #2019 backfill (guard ratchet)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* fix(invoices): log a failed payment-row rollback and keep backfill rows with their audit event

Swedish review round 2 on #2236:

- removeInvoicePaymentRow no longer swallows a failed compensating DELETE:
  it logs at error level with company and row id (a stranded row would
  read as a settlement in the kontantmetod cut-off) and returns whether
  the row is gone. Unit tests for the helper.
- The backfill deletes a company's rows from the run again when its
  behandlingshistorik event cannot be written, so rows and change log
  (BFNAR 2013:2 p. 9.16) never diverge; the company is listed for a re-run.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* fix(invoices): keep raw insert errors out of the v1 and MCP mark-paid responses

Compliance swarm on #2236 (ISO 27001 A.8.28): the payment-row insert
failure returned the driver's error text to API callers and MCP users.
The text now stays in the server log; callers get the reason code and a
generic Swedish outcome.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* fix(invoices): never backfill a payment row into a closed or locked period

Swedish review round 3 on #2236: a row dated into a closed or locked
fiscal period changes facts a filed bokslut or deklaration relied on. The
planner now reports such invoices (period_closed) instead of writing them,
and the script header states that the tagged DELETE is an emergency revert
for the window before any cut-off relies on the rows; afterwards the
correction path is a storno of the cut-off verifikat.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018pMEgrnPsxDMiYfnXcD2Zo

* test(fiscal-periods): pass route params in the two mid-month tests (typecheck ratchet)

cc18e9d53 (#2242) added two POST(req) calls without the params argument,
raising the file's TypeScript error count above the ratchet baseline
(25 vs 23). main is red on "Checks" for every PR since; this unblocks the
gate for #2236 and the rest without touching the baseline.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

DECISIONS.md

@@ -1527,6 +1527,8 @@ One line per decision: `[YYYY-MM-DD] <decision>: <why>`. Appended by agents and
 [2026-09-03] Old-address social identities are unlinked by a BEFORE UPDATE trigger on auth.users (migration 20260903110000), not by the /auth/callback done path: the callback never runs for a completing click from a browser without a session, and admin-side changes bypass it entirely; the trigger covers every path and keeps the email identity, password and BankID intact.
 [2026-09-03] AGI redovisningsperiod = the payout month (agiReportingPeriod on payment_date), not salary_runs.period_*: Skatteverket files per the month the pay went out (kontantprincipen), so lön i efterskott (August work paid 25 September) is declared in September. The in-period payment-date guard (dashboard PATCH, lib/salary/update-run.ts, v1 PATCH, RunHeader min/max) is lifted rather than widened: its only stated reason was that the AGI keyed on period_*, and any residual month window would bite the next efterskott variant. Existing agi_declarations rows keep their stored period (no backfill): a declaration already filed under the earned month is a real-world correction with Skatteverket, not a re-key. New AGI_PERIOD_CONFLICT (409) refuses to overwrite a live run's declaration for the same payout month, since one month's AGI must cover every payment that month and the generator cannot merge runs. Issue #2191.
 [2026-09-03] The cursor:// deeplink is its own allowlist provider (cursor_deeplink) rendered "Din egen dator" and never "Verifierad", after the skeptic, CodeRabbit and Superagent all made the same point: a custom scheme can be claimed by any local app (RFC 8252 section 8.4), so it carries loopback trust, not vendor trust, and the consent page must not say otherwise; https://www.cursor.com/... keeps the verified label. Same pass fixed the consent-page CSP for custom schemes: new URL('cursor://...').origin is the string "null", so form-action became `'self' null` and Chromium would have blocked the post-consent 303 (correctness skeptic refutation); the header now uses the scheme-source (`cursor:`) when the origin is opaque. Not done: rejecting a missing code_challenge at /authorize. A code minted without one is unexchangeable (verifyPkce against an empty challenge is always false, now pinned by a test), so it is fail-closed; making it fail earlier is a separate change touching every client.
+[2026-09-03] settleInvoicePayment writes the invoice_payments row BEFORE the CAS status update and removes it in both failure branches, instead of inserting after the update: the kontantmetod cut-off reads invoice_payments only, so a paid invoice without a row is the #2019 defect itself; failing closed on the insert (voucher storno + INVOICE_PAID_BOOK_FAILED) keeps GL, sub-ledger and invoice status in step. The #2019 backfill inserts only where exactly one posted payment voucher exists (invoice_paid / invoice_cash_payment with source_id = invoice); zero or several vouchers are reported, never guessed, and every row is tagged backfill:#2019 in notes so one DELETE reverts a run.
+[2026-09-03] #2019 skeptic round: the invoice_payments row is written by one helper (lib/invoices/invoice-payment-row.ts) from all four transaction-less settlement paths (dashboard, v1, MCP mark-paid, Stripe), with amount = applied amount (new paid_amount minus prior) rather than cash received, so a 3740 öre absorption never produces a negative fordran in the cut-off or a wrong storno restore. A payment row with transaction_id NULL does NOT count as "reconciled to a bank line" in the two duplicate detectors: the bank line for a manual settlement arrives later and the voucher must still be offered as a twin. The backfill dates rows from the voucher entry_date (paid_at was wall-clock before #1332), refuses rows that disagree with the voucher's 1510 credit / settlement debit, reports partially covered invoices (rows_short) instead of patching them, and records each executed run in behandlingshistorik (new event type InvoicePaymentRowBackfilled, migration 20260903180000). Not done here, pre-existing: the bank-match and pending-operations match paths still store cash received as the row amount, and the kontantmetod cut-off ignores ROT/RUT deduction_total (1513 share shows as outstanding); both filed as follow-ups.
 [2026-09-03] Enable Banking ASPSP_ERROR ladder (#2202): the widest history window a bank has answered is stored per account as accounts_data[].accepted_history_days (no migration; same write-back as dedup_scope and the balance), not as an absolute date, because a bank's limit is a width from today and an absolute known-good date would age into a genuine width rejection. On a rejected window: no wider than accepted = bank unavailable after ONE call; wider = one retry at the accepted width, then unavailable (was up to five calls). AspspUnavailableError maps to 503 BANK_UNAVAILABLE on the web sync route with copy that says the connection does not need renewing; the agent path keeps the contract code BANK_SYNC_FAILED (adding a code touches core contract + structured-errors + v1 docs, left for a follow-up) but no longer persists renewal advice. The envelope's `detail` field is NOT used as a signal: one sample, "Unknown error", identical to a width rejection. A narrowed sync now returns history_from so the UI can say from which date it is complete.
 [2026-09-03] KPI monthly breakdown counts reversed originals (#2201): the monthly section of get_kpi_report_aggregates (new migration 20260903160000) and lib/reports/monthly-breakdown.ts now use tb_ex_year_end's entry set verbatim (posted + reversed, minus the undone year-end chain) instead of posted-only. A same-year storno then cancels inside the months as it does in the year total, so sum(months) = Nettoresultat; the reversal shows as negative revenue in its own month, which is the honest month view. The pg-real pin "in tb, not in monthly" was flipped, not worked around. Unblocks the per-month sum on Nyckeltal (#2196).
 [2026-09-03] customers.country and suppliers.country are ISO 3166-1 alpha-2 at every writer (form select, internal + v1 REST, MCP, imports, provider migration), normalised through one helper (lib/vat/country-codes.ts) that also accepts the Swedish/English names the form used to write; unknown text is a 400 on write and left as-is by the backfill (migration 20260903173000 keeps the original in country_raw for a one-UPDATE rollback, and derives the country from the VAT prefix for eu_business rows whose country was null or only the old writer default SE: on prod that is one validated row plus sixteen without a country, and without it they would flip from reverse charge to 25% on their next invoice). No CHECK constraint on the column: unmapped legacy rows would violate it, and the periodisk report already warns on those. The country-vs-type rule (swedish_business = SE, eu_business = not SE and either in the EU VAT area with a matching prefix or holding an EU-trade VAT registration such as a Swiss company with a DE number or Northern Ireland XI, non_eu_business = outside the EU) is enforced on customers only, and on update only when type, country or VAT number is part of the change so a contradictory legacy row can still change its email; individuals are free (a foreign private person is still a Swedish-VAT customer) and suppliers get normalisation without the rule, since #2025/#2028 are about sales VAT. An omitted country on create is SE for Swedish types, derived from the VAT prefix for eu_business, and a 400 for non_eu_business: guessing a non-EU country is not possible, and Sweden-by-default was the bug. vat-rules.ts takes the country as a third optional argument and refuses reverse charge only for SE (a VIES-validated number outweighs a non-EU address), and not for an unknown/unmapped country: charging Swedish VAT to a genuine German customer whose row says Deutschland (Bayern) would be the worse error.