fix(transactions): resolve customer-invoice payment account from cash_account_id (#987)

* refactor(transactions): add shared settlement-account resolution helper

Cherry-picked from fork/worktree-starry-waddling-wirth (PR #985) commit
34d5d35 — pulling in just the new lib/bookkeeping/settlement-account.ts
helper and its test, without the match-supplier-invoice route changes
from that PR (those depend on 8bfc31d, not yet on main, and are out of
scope here).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* fix(transactions): resolve customer-invoice payment account from cash_account_id

Customer-invoice payment matching never resolved the bank leg from the
matched transaction's own cash_account_id: it was unconditionally
hardcoded to 1930 in buildInvoicePaymentClearingLines,
createInvoicePaymentJournalEntry, and createInvoiceCashEntry, with no
override parameter at all. Any bank receipt landing in a non-primary
cash/bank account (a secondary SEK account, or a foreign-currency
account like 1940 for EUR) was silently misbooked to 1930 -- the same
class of bug PR #985 fixed on the supplier-invoice side, except
unconditional there (no stale-setting trigger needed).

Adds an optional paymentAccount parameter (default '1930', preserving
behavior for every caller that doesn't pass one) to the three lib
functions, and threads resolveSettlementAccount(cash_account_id) through
every real bank-transaction-matching call site: the dashboard
match-invoice route (POST + preview), its v1/MCP-facing counterpart, and
the agent/MCP match_transaction_invoice commit path. Deliberately left
on default 1930: mark-paid (dashboard + v1, no bank transaction in
scope), fix-cash-mismatch (narrow historical repair tool for a different
bug), and the agent mark_invoice_paid commit path.

Brings in lib/bookkeeping/settlement-account.ts (cherry-picked from
fork/worktree-starry-waddling-wirth commit 34d5d35) so this PR is
mergeable independently of #985's merge order.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* test(invoice-entries): cover ROT/RUT 1513 line stays fixed under a non-default paymentAccount

Compliance-bot finding on PR #987: createInvoiceCashEntry's paymentAccount
override was only tested against a plain standard_25 invoice, never
combined with a ROT/RUT deduction_type item. The 1513 receivable line was
already correctly untouched by paymentAccount (it's never the bank leg),
this just closes the test-coverage gap.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* fix(bookkeeping): abort instead of silently defaulting to 1930 when settlement-account lookup errors

Same shared-helper fix as PR #985/#986: resolveSettlementAccount now
throws BookkeepingDatabaseError on a genuine cash_accounts query error
instead of warning and falling back to 1930. An explicit cash_account_id
almost certainly resolves to a non-1930 account, so a transient failure
masking it risked the same class of misbooking this whole PR series
exists to fix, just via infra flakiness instead of a stale setting.

No route/commit.ts changes needed: match-invoice (POST + preview) run
under withRouteContext's existing catch-all, and commitPendingOperation
already has identical generic bookkeeping-error handling for every other
engine failure. Added regression tests for all three call sites
(dashboard POST, preview, and the agent/MCP commit path) confirming the
abort rather than assuming the shared infrastructure handles it silently.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* fix(v1): guard resolved settlement account against chart of accounts

Closes the two remaining gaps from jakobwennberg's triage on #987
(after rebasing onto main and picking up the already-pushed
resolveSettlementAccount abort-on-error fix):

- Added the v1 match-invoice route-level test coverage that was
  missing (cash-account threading, BOOKKEEPING_DATABASE_ERROR abort,
  ACCOUNTS_NOT_IN_CHART), mirroring the dashboard route's existing
  settlement-account-resolution tests.
- Added the same findUnresolvableAccounts pre-validation guard against
  chart_of_accounts that 32c07c4 added to #986's match-supplier-invoice
  route, gated on !customLines since that is the only branch here that
  consumes the resolved paymentAccount.

Signed-off-by: Jonas Flodén

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* test(bookkeeping): align settlement-account error assertion with #985

Use .rejects.toBeInstanceOf(BookkeepingDatabaseError) instead of
toMatchObject({ constructor: ... }), matching #985's edef79d follow-up
(the assertion was correct either way, but this is the more idiomatic
check and now makes the shared helper's test file byte-identical
across #985/#986/#987, removing the add/add merge conflict between
them noted in the merge-order validation.

Signed-off-by: Jonas Flodén

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* test(invoice-payment-lines): add missing 3740 coverage for non-1930 paymentAccount

CodeRabbit nitpick on #987: the test named "...does not affect the
FX-diff or öresavrundning lines" only exercised the 3960 FX-diff
branch, never the pure-SEK 3740 öresavrundning branch it also claimed
to cover. Split into two tests: the existing one renamed to describe
only its FX-diff coverage, plus a new pure-SEK sub-krona-short case
with a resolved non-1930 paymentAccount asserting the 3740 line books
correctly and the bank leg lands on the resolved account, not 1930.

Signed-off-by: Jonas Flodén

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* fix(ci): quote compliance-pr.yml name to fix invalid YAML

The unquoted colon in `name: compliance: review (advisory)` (introduced
by #890's em-dash removal, which swapped an em dash for a colon
in-place) makes YAML read it as a nested mapping key, so GitHub can't
parse the workflow at all - every run fails with 0 jobs scheduled.

Signed-off-by: Jonas Flodén

Signed-off-by: Jonas Flodén <jonas@floden.nu>

* Revert "fix(ci): quote compliance-pr.yml name to fix invalid YAML"

This reverts commit e7c890245d1834cd8f3c9b13a2bc3247fea7eacb.

Signed-off-by: Jonas Flodén <jonas@floden.nu>

---------

Signed-off-by: Jonas Flodén <jonas@floden.nu>
Co-authored-by: Jakob Wennberg <jakob.wennberg@gmail.com>

lib/bookkeeping/invoice-payment-lines.ts

@@ -129,12 +129,30 @@ export interface PaymentClearingLines {
  *   otherwise defer (book 1930 = 1510 = bankSek with no FX line). The
  *   deferred path leaves the GL slightly understated until the final
  *   settlement closes the invoice.
+ *
+ * # paymentAccount
+ *   The bank-leg account (the debit line below). Defaults to '1930': callers
+ *   that haven't resolved the transaction's actual cash account keep booking
+ *   there unchanged. Callers matching a real bank transaction should resolve
+ *   it via resolveSettlementAccount (cash_account_id -> cash_accounts.ledger_
+ *   account) and pass it here so a receipt into a non-primary bank/cash
+ *   account (e.g. a secondary SEK account, or a EUR account on 1940) doesn't
+ *   silently get misbooked to the primary account.
  */
 export function buildInvoicePaymentClearingLines(
   tx: PaymentClearingTx,
   invoice: PaymentClearingInvoice,
   description: string,
   paidInInvoiceCurrency?: number,
+  /**
+   * BAS account for the bank leg (the 1930 debit below). Defaults to '1930'
+   * to preserve existing behaviour for every caller that doesn't pass one.
+   * Callers that know which cash account the underlying bank transaction
+   * actually belongs to (via cash_account_id -> cash_accounts.ledger_account,
+   * see lib/bookkeeping/settlement-account.ts) should resolve it and pass it
+   * here instead of always booking to the primary bank account.
+   */
+  paymentAccount = '1930',
 ): PaymentClearingLines {
   // Bank-leg: actual SEK that hit the bank. resolveSekAmount returns the
   // raw amount for SEK txs and amount * exchange_rate for foreign txs
@@ -201,7 +219,7 @@ export function buildInvoicePaymentClearingLines(
 
   const lines: CreateJournalEntryLineInput[] = [
     {
-      account_number: '1930',
+      account_number: paymentAccount,
       debit_amount: bankSek,
       credit_amount: 0,
       line_description: description,