Mirror the BudgetVsActualTable structure in the Actual-vs-Actual compare
mode so MoM and YoY both surface a Monthly block (reference month vs
comparison month) and a Cumulative YTD block (progress through the
reference month vs progress through the previous window).
- CategoryDelta gains cumulative{Previous,Current}Amount and
cumulativeDelta{Abs,Pct}. Legacy previousAmount / currentAmount /
deltaAbs / deltaPct are kept as aliases of the monthly block so the
Highlights hub, Cartes dashboard and ComparePeriodChart keep working
unchanged.
- getCompareMonthOverMonth: cumulative-previous window ends at the end
of the previous month within the SAME year; when the reference month
is January, the previous window sits entirely in the prior calendar
year (Jan → Dec).
- getCompareYearOverYear: now takes an optional reference month
(defaults to December for backward compatibility). Monthly block
compares the single reference month across years; cumulative block
compares Jan → refMonth across years.
- ComparePeriodTable rebuilt with two colspan header groups, four
sub-columns each, a totals row and month/year boundary sub-labels.
- ComparePeriodChart unchanged: still reads the monthly primary fields.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Services: getCompareMonthOverMonth(year, month) and getCompareYearOverYear(year)
return CategoryDelta[] (expense-side, ABS aggregates, parameterised SQL only)
- Shared CategoryDelta type with HighlightMover now aliased to it
- Flesh out useCompare hook: reducer + fetch + automatic year/month inference
from the shared useReportsPeriod `to` date; budget mode skips fetch and
delegates to CompareBudgetView which wraps the existing BudgetVsActualTable
- Components: CompareModeTabs (MoM/YoY/Budget tabs), ComparePeriodTable (sortable
table with signed delta coloring), ComparePeriodChart (diverging horizontal
bar chart with ChartPatternDefs for SVG patterns), CompareBudgetView
(fetches budget rows for the current target year/month)
- ReportsComparePage wires everything with PeriodSelector + ViewModeToggle
(storage key reports-viewmode-compare); chart/table toggle is hidden in budget
mode since the budget table has its own presentation
- i18n keys: reports.compare.modeMoM / modeYoY / modeBudget in FR + EN
- 4 new vitest cases for the compare services: parameterised boundaries,
January wrap-around to December previous year, delta conversion with
previous=0 fallback to null pct, year-over-year spans
Fixes#73
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
