- SessionCard SVG: cosine-corrected coordinates with proper aspect ratio (xMidYMid meet)
- SessionCard: use --color-primary for track/distance/pace, add Gauge icon for pace
- History detail: theme-reactive pace chart colors via MutationObserver + matchMedia
- History detail: add Gauge icon, accent color for distance/pace stats, remove "avg" label
- Move GPS remove button from info view to edit screen
- Add Leaflet map preview to edit screen
- Remove data points count from GPS indicators
Add GPX file upload for cardio exercises in workout history. Parses
GPX track points and stores them in the session. Shows route map
(Leaflet), pace-over-distance chart (Chart.js), and per-km splits
table with color-coded fast/slow pacing. Auto-fills distance and
duration on single-set exercises. Disables Chart.js animations.
