Move GPS collection from WebView JS (watchPosition) to native Android
LocationForegroundService, which survives screen-off. JS polls native
side for accumulated points. Also: auto-enable GPS for cardio exercises,
filter saved track to workout duration only, fix live map batch updates,
notification tap opens active workout, and fix build script for pnpm.
Wraps the web app in a Tauri Android shell that provides native GPS
via the geolocation plugin. Includes foreground service for background
tracking, live map display, GPS data storage in workout sessions,
and route visualization in workout history.
Alexander