Task group 2 (part a) of elevation-profile-hardening — wire the group-1
primitives into the headline stat and the chart.
- computeElevation (parse.ts): despike each segment's elevation sequence,
then take filteredTotals; gain/loss are now noise-filtered (no more
20–50% inflation from per-point jitter), the profile is built from the
despiked data, and additive gainRaw/lossRaw expose the unfiltered sums.
- elevationSeries: despike per segment (no cross-trkseg interpolation)
before downsampling, so the chart and the headline totals derive from
the same cleaned data.
- types.ts: GpxData.elevation gains gainRaw/lossRaw (additive).
Well-formed monotonic climbs are unchanged (steps exceed the 5 m
threshold → filtered == raw); a shared noisy-track test proves jitter is
filtered and a 300 m single-point spike is interpolated out of both the
totals and the chart.
Verified: gpx 111/111; full pnpm typecheck 13/13, lint 13/13, test 11/11
(journal + planner compile with the additive fields).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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