Boards with a camera surface their webcam state in the header
(CameraToggle); components that ARE cameras — vision sensors whose
element captures the webcam itself — had no header presence, so users
who learned "the header icon says my webcam is in use" read its absence
as a broken feature. A tiny registry seam lets any component register
its camera (label, live/error/off, reason, toggle); the header renders
one CameraToggle-styled button per entry and nothing when none.
David Montero Crespo