- 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>
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