EchoScope 0.12.0 — airport overlay

Airport markers on the radar, supplied automatically by the info server.

• Default: airports with scheduled airline service, labelled with IATA codes such as LGW/LHR (ICAO/local code fallback).
• Web setup → Info server features → Airport overlay: Off/Airline/All; Any/Medium + large/Large only; labels; colour and brightness.
• Muted blue-grey square/runway symbols at 35% brightness, behind aircraft and trails. Overlapping labels and crowded markers are suppressed.
• Works with plain radar or the street-map background. Up to 32 airports within radar range, prioritising airline service and larger airports. Range changes refresh the overlay automatically.
• Separate capability discovery hides the feature on older/unavailable servers. Existing airport caches upgrade automatically to include size categories.

Update both the Docker service (git pull, make docker) and firmware (git pull, hold the knob for five seconds, make upload IP=192.168.2.151). Defaults enable the overlay when the updated server is available; no API key or MQTT setup is needed.

41 service tests, firmware host tests, Docker endpoint smoke checks and native LVGL rendering checks passed. Firmware application: 1,773,192 bytes; static RAM: 97,716 bytes. Physical hardware has not been flashed.