Road trips, sentry history, and smarter charts arrive in MateDroid 1.4.

Added:
- Trip grouping: auto-detects road trips with route maps, country flags, and per-leg stats
- Sentry alert history with 6-day heatmap and location-aware alerts
- Widget now shows charging power
- Mileage screen: energy cost, consumption, and efficiency

Changed:
- Chart Y-axis labels auto-scale to data range

Fixed:
- Temperature and unit conversion issues on multiple screens
