/** Per-file view rotation keyed by id, shared by a gallery and its fullscreen modal so it survives
 *  navigation while mounted. A render transform, never a mutation of the stored file. */
export interface ImageRotation {
    rotations: Record<string, number>;
    rotationFor: (id: string) => number;
    /** `step` 1 clockwise, -1 counter-clockwise. */
    rotate: (id: string, step?: 1 | -1) => void;
}
export declare function useImageRotation(): ImageRotation;