Navigation HUD data field for fēnix 7X + ENGO3: north-up route view, FIT course points, early 50 m turn zoom, deviation track and live activity metrics.

- NORTH-UP route view with an approximately 400 m default view span. - Current position sits slightly below map center so route geometry is visible both ahead and behind. - 6 px route line plus an off-route track and connector when deviation is detected. - Embedded FIT Course and Course Point support. - Turn course points trigger early at about 90 m and switch the local map to a 50 m view. - Course points can show turn markers and POIs; the bundled sample contains a restroom point shown as WC on the glasses. - Live HUD metrics: activity time, distance, altitude, current HR, max HR and current speed. - MDP08 color HUD using the ActiveLook 81 RG palette, with a startup color calibration screen. - Event-driven BLE plus bounded ~1 Hz compute() maintenance; no Toybox.Timer.