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Marc-André BombeckandClaude Opus 4.8
0995664893
Add an optional Recharts <Brush> to the shared HealthChart, gated behind a new `selectableDomain` prop. When set, the chart mounts the brush beneath the plot and reports the Min/Max/Median/Mean over the brushed window per type through `onDomainStats`. A range-tab change or a series refetch clears or clamps the selection so the brush never indexes past the data. The dashboard, trends-row, VO2 row, sleep, and rationale mounts do not pass the prop, so they render unchanged — the feature is fully isolated behind the flag. `computeWindowStats` is a pure helper (no React/Recharts) so the chart can summarise the array it already holds without a refetch and the maths is unit-tested directly. The median uses the same linear-interpolated midpoint as `summarize()` so a window and the full-range summary read on one algorithm. `useChartDomainStats` lifts the per-type window into shared state with a stable callback and a shallow guard against repeat windows. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>