GEV itself registers no new subject: with no provider, the Cockpit offers
aircraft, satellites and vessels as before, except that the most recently
selected of them now wins entry.
- services.cockpitSubjects: providers ({kind, layerId, entryFace, priority,
isEntryAllowed, read, hold, release, hud}) are checked once by the
coordinator; frames and HUD views on every update; a throwing provider
ends its view or keeps the last HUD.
- Entry: the most recently selected subject wins, across all kinds.
- Camera: a frame may turn the ground clamp off, anchor exactly on the
subject and update every frame.
- A generic HUD: kicker, title, cards, always-visible source rows, banner,
a veil with light streaks (off under reduced motion) and a bottom
progress line whose close ticks merge.
- Text comes from the provider, already in the page's language
(./i18n/locale: getLocale, onLocaleChange).
- Rail and Transit read and hold APIs (getSelectedTrain/Vehicle,
getCockpitSubject, setCockpitSubject, focusTrain/Vehicle); a held
train's marker, card and route line are hidden, and its feed keeps
polling while held.
- ./layers/rail/paths is exported.
