0.4.0

Added

• About screen shows the author name, source code repository, and app license
• Workout detail speed chart (distance km × speed km/h) with tap tooltip, avg/max rows; GET /api/v1/workouts/{id}/speed (precomputed chart, up to 500 points) and speed_max_kmh on workout responses
• Workout detail heart-rate chart (distance km or elapsed minutes × bpm, red fill) with tap tooltip, avg/max rows; GET /api/v1/workouts/{id}/heartrate (precomputed chart, up to 500 points); heart_rate_max on workout list/detail responses; heartrate-chart.json / bbolt heart_rate_charts (+ federated buckets)
• Sport types Nordic Walk (NordicWalk) and Ice Hockey (IceHockey); sport categories Strength, Team, and Racket

Changed

• Equipment type "Shoes" uses the Material Symbols steps icon instead of the walking-person glyph
• Sport type picker regrouped (strength / team / racket categories) with updated labels, order, colors, and icons; Strava import IDs unchanged for existing sports
• Breaking: bbolt speed/heart-rate chart bucket values use packed binary instead of JSON (file driver still stores speed-chart.json / heartrate-chart.json). Recreate the bbolt database or re-attach tracks after upgrade.
• Breaking: speed chart storage replaces full speed sidecars (speed.yaml / speed.json): pre-downsampled chart only (speed-chart.json blob on file driver; speed_charts / fed_speed_charts bbolt buckets on bbolt driver). Re-upload workouts with tracks after upgrade.
• Heart-rate chart without GPS omits distance_m; the UI uses minutes from the first HR sample
• Speed and heart-rate charts keep finite zero samples (speed_kmh / heart_rate_bpm >= 0); NaN/Inf are still dropped. Toggle via tracks.SpeedChartZeroPolicy / tracks.HeartRateChartZeroPolicy (ChartZeroKeep or ChartZeroOmit). Re-attach tracks to refresh stored charts.

Fixed

• grom migrate-storage copies speed/heart-rate charts between file JSON blobs and bbolt binary buckets (alongside other metadata)
• /api/docs (no trailing slash) redirects to /api/docs/ so Swagger UI assets load instead of a blank page
• bbolt: renaming a workout (e.g. edit that changes start_date) migrates speed/heart-rate chart buckets instead of deleting them; edit form preserves start-time seconds so silent truncations no longer trigger a rename