Three ways an imported amount could be silently wrong, all of them passing
validation, all of them fixed here.
The two-column rule was `isNaN(credit) ? -debit : credit`, so the credit always
won. Many banks write `0,00` in the unused column rather than leaving it empty,
and `isNaN(0)` is false -- every debit of such a file imported as 0,00 and the
expense simply vanished, with no error anywhere. The rule is `credit - debit` on
magnitudes now, which needs no special case for a `0,00` cell (zero is the
identity of the subtraction) and implements the documented convention even when
an export negates its debits. A row unreadable in BOTH columns is an error
instead of a free 0,00 transaction.
`parseFrenchAmount` ended on `parseFloat`, which returns the longest valid
PREFIX instead of rejecting. Measured before the fix: `"50,00-"` -> 5000,
`"1 234,56 CR"` -> 123456, `"100,00 CAD"` -> 10000. A factor-100 error, and it
passes `isNaN`, so those rows counted as VALID everywhere downstream -- which
would have defeated the signed preview (#329), the safety net of the whole
chantier. Validation is anchored over the whole normalized string now and any
residual character yields NaN.
NaN, not a rescued magnitude, for a trailing `CR`/`DB` or currency code. Two
reasons: `CR`/`DB` carry a DIRECTION, so returning a magnitude for both would
trade a loud failure for a silent SIGN error (the D/C-indicator shape is refused
upstream by design, #328); and `"100,00 CAD"` is structurally identical to
`"2025 Montant"`, so whitelisting a trailing word to rescue the first re-blinds
`detectHeader` on the second. Two accounting forms ARE legitimate and supported:
parentheses `(50,00)` and a trailing sign `50,00-`.
The `?? 0` fallbacks read column 0 -- usually the date -- when the mapping was
incomplete. An unmapped amount column is an explicit row error now, reported
ahead of any per-row problem since it is a format error affecting every row.
`1.234` is 1234 in a French column and 1.234 in an English one, and no rule
applied to that cell ALONE can tell. `detectDecimalSeparator` arbitrates from
the decisive siblings of the column and `parseFrenchAmount` takes the verdict as
an option. Detection deliberately stays out of it: it runs before a column is
known to be an amount column at all, so the verdict is applied where the value
actually becomes a transaction.
The rule itself moves out of the hook as a pure `mapRow(raw, format)` in
`importFormat.ts`. That is what lets the corpus tests run the REAL rule -- the
hand-written mirror in `csvAutoDetect.test.ts` and the static guard pinning five
`parseFilesInternal` expressions are both deleted -- and what stops the
detection score (#328) and the signed preview (#329) each re-implementing it.
Hardening is global: the parser is shared by 11 call sites, 8 in
`csvAutoDetect.ts` and 3 in the holdings CSV import (#245), where a price cell
`150,25 CAD` used to store 15025. It is refused now and `buildDetailedLines`
raises on the empty price. An unreadable QUANTITY was worse -- coerced to 0, so a
zero-value position saved in silence; the draft keeps the offending text instead
and the existing `snapshot_priced_quantity_required` fires.
Row errors become i18n keys (`import.rowErrors.*`) rather than the raw English
literals rendered straight into the preview table, since this adds a
user-visible string. The report table also carries raw exception messages, so
both render sites resolve through `isRowErrorKey` and never feed `t()` anything
that is not ours.
Test churn, per link 1's handoff (update the expectation, drop the marker, never
delete the test): the three `#325` KNOWN DEFECT blocks in `amountParser.test.ts`
flip, plus `unused-column-zero` in `csvAutoDetect.test.ts`. One block tagged
`#328` flips too -- `header-numeric-label`, whose own comment reads "#328 adds a
lexical signal to detectHeader, and #325 anchors the parser [...] either fix
closes this". The anchored parser landed first. The other `#328` blocks
(`debit-credit-reversed`, `absolute-indicator`) and the `#329` block are
verified unchanged. CHANGELOG and docs stay centralized in the last link of the
stack, as the plan specifies.
989 vitest (963 before), tsc + vite build clean, cargo check clean. No DB
migration.
Resolves#325
- importedFileService now upserts: if file hash already exists for a
source (e.g. from a previous failed import), it updates the existing
record instead of hitting the UNIQUE constraint.
- Replaced Tailwind amber/red/emerald colors with the app's CSS
variables (--negative, --positive, --accent) for proper contrast
on the cream background theme.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
