Real Banana Income & Expense files name the category column 'Category', not
'ContraAccount' (which the doc listed but is a double-entry concept) — so the
income/expense account never landed and Banana warned 'ContraAccount column not
found'. Use 'Category'. VatCode stays (it only warns on a non-VAT-enabled file;
amounts are gross). Test updated.
The Date column imported empty into Banana because dateOnly() did
String(d).slice(0,10) — on Postgres the date columns come back as JS Date
objects, so that yields "Thu Jan 15" instead of "2026-01-15", which Banana
rejects. (SQLite returns strings, so the tests never caught it — the
pg-date-serialisation trap.)
- ledgerService.dateOnly + taxReportService CSV now format Date objects to
yyyy-mm-dd via local calendar parts (DATE columns are local-midnight).
- Regression test added with a real Date object (the existing tests all used
string dates).
The Banana export assumed a double-entry file; a user importing into an Income
& Expense (Einnahmen-Ausgaben) file got "AccountDebit/AccountCredit/Amount/
VatCode column not found", since those columns only exist in double-entry.
Add a second Banana format alongside the double-entry one:
- ledgerService: new `banana_ie` format → Banana I&E columns Date, Doc,
Description, Income, Expenses, ContraAccount (the income/expense account),
VatCode (banana.ch doc 9946). Revenue → gross in Income + revenue account;
cost → gross in Expenses + expense account. Same tab-separated .txt shape.
- Frontend: ExportFormat + dropdown gain `banana_ie`; .txt extension covers
both Banana variants. Labels relabelled: "Banana — double-entry" and
"Banana — income & expense" (de equivalents). Hint de-"double-entry"-fied.
- Test added for the I&E format.
Pairs with the prior UTF-8 BOM fix (the "·" mojibake). Tests + build green.
Banana's "Text file with column headers" import (Actions → Import into
accounting) requires a TAB-separated .txt with unquoted values — picpeak was
emitting a comma-separated, quoted .csv, which won't even show in Banana's
*.txt file picker, let alone parse into columns.
- ledgerService.exportPostings: the `banana` format now serialises TAB-separated
with no quoting, .txt extension, text/plain content-type. generic + bexio stay
comma-CSV (RFC 4180). Tab/newline chars in a cell are collapsed to spaces.
- Frontend ledger.service: download filename uses .txt for banana.
- Tests updated for the new banana shape (tab header, .txt, text/plain).
The column names already matched Banana's NameXml; only the serialisation was
wrong. bexio left as comma-CSV (verify against bexio's import spec separately).
Luca