A detailed (by-security) account can now import its positions from a CSV
instead of adding each security one by one. An "Import CSV" button next to
"Add a title" opens a native picker; the delimiter, encoding and columns
(symbol, quantity, optional price + book_cost) are auto-detected via new
csvAutoDetect helpers and adjustable in a small mapping editor. Rows sharing
a symbol are merged (SUM qty + book_cost, first price) and the batch is merged
into the basket by normalized symbol, so no UNIQUE(snapshot_line_id,
security_id) violation can occur at save. A CSV without a price column imports
quantities with an empty unit_price (fetch/type later) — the existing atomic
save path is unchanged (no SQL/Rust change).
- csvAutoDetect: autoDetectHoldingColumns + analyzeHoldingsCsv (+ tests)
- useSnapshotEditor: holdingsFromCsvRows + IMPORT_HOLDINGS action + importHoldings (+ tests)
- HoldingsCsvImportModal: file pick -> parse -> mapping editor + preview
- i18n FR/EN under balance.snapshot.detailed.importCsv.*
- CHANGELOG (Added / Ajouté)
Resolves#245
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
