The medication list fired one compliance request per card every 30
seconds, and each request scanned the medication's full intake history
and expanded the recurrence calendar five to six times. The endpoint now
mints bands once per request, serves the sub-windows from that single
ledger, bounds the event read to a year of selected columns and sits
behind a write-invalidated 15-minute server cache; the cards poll at
five minutes. The dashboard drops two redundant checklist queries by
reading counts from the snapshot, the BMI chart derives from the weight
series instead of refetching it, the detail page no longer serialises
behind the auth probe and seeds its query from the list row. Expensive
analytics reads gain a shared per-user rate limit, and the service
worker stops serving cross-version shells, enables navigation preload
and trims caches in one pass.
Add a 7d / 30d / 90d / 1y segmented control to every HealthKit metric page,
between the stat strip and the chart, with a sentiment-coloured "vs prior
period" delta caption beside it.
New route GET /api/analytics/range?type=<MeasurementType>&range=<7d|30d|90d|1y>
returns the current-window aggregate, the previous comparable window, and the
composed delta. Single metric type by construction, so the read is one
rollup-tier call covering the trailing 2N days sliced into the two halves —
no per-type fan-out, no Prisma-pool burst. Reuses the WMY readers
(readBestGranularityRollups + aggregateWmyBuckets) and the two-window pattern
the year-ago baseline already uses; count/min/max/mean/sum compose across
buckets, SD/slope/r2 stay out (not composable). The cached summaries slice is
untouched so the hottest dashboard cache key never fragments.
The delta caption reuses the dashboard's metric-aware up-good/up-bad colour
logic — extracted from trend-card into a shared trend-sentiment module — with
the metric's good direction sourced from the metric-status registry
(target-band metrics render neutral, matching deviation framing). When the
prior window has no data the caption shows "no prior-period data" rather than
a misleading 0%. The range choice persists across metrics via a localStorage
seam and defaults to 30d so nothing regresses. Cache keyed per (type, range)
through the query-key factory.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
(cherry picked from commit eac87a9f8b144f4d8e7a8b950528a19d5dcf8726)
Marc-André Bombeck