Function installCanvasGestureOwnership

installCanvasGestureOwnership(
canvas: HTMLCanvasElement,
events: EventGroup,
): void
Claim touch gestures over canvas for the viewer's controls. Idempotent; safe on any element the app is handed (guards computed-style access).
Parameters
- canvas: HTMLCanvasElement
  The canvas the controls listen on.
- events: EventGroup
  The app's listener group; the Safari gesture listeners are registered on it so dispose() removes them.
Returns void
- Defined in src/core/app/interaction/canvas-gesture-ownership.ts:63