/** Device-local, reversible camera experiment. Photos and optical settings are untouched. */
export type CameraComposition = 'wall' | 'legacy';
const KEY = 'behind-glass-camera-composition-v32';
export function readCameraComposition(storage?:Pick<Storage,'getItem'>):CameraComposition {
  try {return storage?.getItem(KEY)==='legacy'?'legacy':'wall';} catch {return 'wall';}
}
export function saveCameraComposition(storage:Pick<Storage,'setItem'>|undefined,mode:CameraComposition):boolean {
  try {if(!storage)return false;storage.setItem(KEY,mode);return true;} catch {return false;}
}