Matt
681b94a8ef
Adds a "Compare to prior period" toggle to the Sales report header. When on, the API recomputes the KPI window for the equal-length window immediately preceding the selected range (previousPeriodBounds) behind `?compare=1`, and the five window-derived KPI tiles (Won, Lost, Win rate, Avg time-to-close, New leads) render colour-correct "vs prior" deltas. Point-in-time tiles (Active interests, Pipeline value) have no prior-window analogue and intentionally show no delta. The prior-window query runs in parallel with the main batch and resolves to null when the toggle is off (zero cost). Toggle state persists in the saved-template config. Closes the spec's "period comparison on every report" gap for Sales; Operational already rendered period-start deltas. Pure helpers TDD'd: previousPeriodBounds (range.ts) + computeSalesKpiComparison (sales-comparison.ts), 7 unit tests. tsc + lint clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>