Files
HealthLog/src/lib/ai
Marc-André Bombeck 8902d3985c fix(measurements,insights): source-collapse + timezone parity across multi-source surfaces
Four data-correctness fixes in the same class as the workouts-list
ordering bug (05f80ad37):

- GET /api/measurements groupBy=day: the raw-row scan ordered oldest
  first and sliced to `limit` before bucketing, so a long history never
  surfaced its recent days. Reads newest-first now. The per-day sum
  also ran over every source unfiltered — an Apple Health + Withings
  write for the same day doubled the total. Routes through
  pickCanonicalSourceRows first, matching the rollup tile's collapse.

- PR detection's cumulative-day picker summed every row on a calendar
  day regardless of source (false "record" days) and bucketed on the
  UTC calendar day instead of the user's timezone. Rewritten to
  source-collapse before summing and bucket on the user's IANA zone,
  reading through the worker's injected Prisma client so the existing
  dependency-injection contract for tests stays intact.

- The correlation-discovery matrix (the insights route, the per-metric
  assessment card, and the Coach's get_correlations tool — three
  independent copies of the same fetch) averaged cumulative types
  (steps, daylight) and sleep across mismatched grains: per-sample
  chunk means blended with drained daily totals, and sleep averaged
  per-stage segment durations instead of summing a night's total.
  Hoisted the grain resolution into one shared
  buildMeasurementDailySeries helper (source-collapsed day-sum for
  cumulative types, per-night reconstruction for sleep, mean
  unchanged for spot vitals) so all three surfaces agree.

Regression tests cover newest-first ordering, cross-source collapse
matching the rollup, PR no-double-count, and the shared grain helper.
2026-07-17 23:12:12 +02:00
..