Surface unrealized (latent) gain on the existing balance surfaces, no new
visualization (decision 2026-06-04).
Service:
- AccountLatestSnapshot gains account `kind` + `latest_snapshot_line_id`, so
the table knows which rows are detailed and where their holdings live.
- getAccountLatentGainByLine(lineId) folds a line's holdings through the
existing computeUnrealizedGain (shares the book_cost=0 / NULL -> N/A guard).
- rollupLatentGain(accounts): pure aggregation by asset class, by envelope
(vehicle_type, 'none' bucket), and grand total; per-bucket % denominator is
the known book_cost only (null when none), mirroring the aggregate guard.
Hook (useBalanceOverview):
- Prefetches per-detailed-account latent gain in parallel (failures isolated),
exposes latentGainByAccount + latentGainRollup. Simple accounts skipped.
UI:
- BalanceAccountsTable: expandable detailed rows -> per-security value + latent
gain %; a latent-gain column (shown only when a detailed account has one);
a summary block aggregating latent gain by asset class / envelope.
- BalanceOverviewCard: total latent gain line (hidden without detailed accounts).
- N/A rendered (never divide-by-zero) when book_cost is NULL or 0; partial-%
flag when some positions lack a cost basis.
Native non-CAD currency display de-scoped this round (untestable while all
securities are CAD). Modified Dietz return columns (#204) unchanged.
i18n: balance.latentGain.* in FR + EN. Focused unit tests for
getAccountLatentGainByLine and rollupLatentGain (grouping, 'none' envelope,
null-% / unknown book_cost, empty).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Issue 3 of overnight-2026-06-01-bilan-axe-vehicule. Builds the tracking UI
on top of the merged data layer (#202) and input UI (#203).
- Service: getSnapshotTotalsByVehicleAndDate(range) mirrors the by-category
aggregation with GROUP BY COALESCE(a.vehicle_type, 'none') so null-envelope
accounts land in a single 'none' bucket (never a SQL NULL key). Add
vehicle_type to getAccountsLatestSnapshot SELECT + type.
- useBalanceOverview: new groupAxis ('class'|'vehicle') state ORTHOGONAL to
chartMode; loads byVehicle alongside byCategory. Default groupAxis='class'.
- BalanceEvolutionChart + BalancePage: stacked-mode sub-toggle 'Par classe
d'actif' (default) / 'Par enveloppe'. Vehicle legend reuses the #203
vehicleType.* labels; the 'none' bucket uses balance.vehicle.none.
- BalanceAccountsTable: 4 return columns collapsed by default with a toggle,
persisted across sessions via userPreferenceService key balance_show_returns.
- i18n FR/EN: balance.chart.axis.{byAssetClass,byVehicle}, balance.vehicle.none,
balance.accountsTable.toggleReturns.{show,hide} (+ axisLegend aria label).
Tests: npm run build green (0 type errors); vitest 3314 passed. Added 5
service tests for the 'none' bucket + mixed envelopes + date range.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Scoped useReducer hook backing BalancePage. Tracks:
- period (3M / 6M / 1A / 3A / all) — defaults to 1A
- chartMode (line / stacked) — defaults to line
- evolutionTotals + evolutionByCategory + accountsLatest +
accountsPeriodAnchor (parallel-fetched on mount and on every
period change via Promise.all)
- isLoading + error
Exposes computeBalanceDateRange(period, today) as a pure helper
so the date math is unit-testable without mocking time. Anchors
on `today` rather than the latest snapshot — keeps the chart's
right edge stable as the user enters new snapshots.
Refs: #141
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
