/**
 * NrrdState — Grouped state management for NRRD annotation data.
 *
 * Replaces the flat INrrdStates object with 5 semantic sub-groups:
 * - image:       Read-mostly metadata set during NRRD loading
 * - view:        Runtime display/navigation state
 * - interaction: Mouse/cursor tracking
 * - sphere:      SphereTool-specific data
 * - flags:       Internal operational flags
 *
 * Phase 4 of the State Management Refactor.
 */
import type { IImageMetadata, IViewState, IInteractionState, ISphereState, IInternalFlags } from "../core/types";
export declare class NrrdState {
    readonly image: IImageMetadata;
    readonly view: IViewState;
    readonly interaction: IInteractionState;
    readonly sphere: ISphereState;
    readonly flags: IInternalFlags;
    constructor(baseCanvasesSize?: number, layers?: string[]);
    /** Set zoom factor with clamping [1, 8] */
    setZoomFactor(factor: number): void;
    /** Reset all sphere state to defaults */
    resetSphereState(): void;
}