import type { StateStore } from 'mythik';
/**
 * Write device context to store (extracted for testability).
 * The hook calls this + subscribes to changes.
 */
export declare function writeDeviceContext(store: StateStore, insets?: {
    top: number;
    bottom: number;
    left: number;
    right: number;
}): void;
/**
 * Auto-tracks device context and writes to /ui/device/* in the store.
 * React Native implementation: uses Dimensions, Platform, Appearance, PixelRatio.
 * Subscribes to dimension changes (rotation) and appearance changes (dark mode).
 */
export declare function useDeviceContext(store: StateStore, enabled?: boolean): void;
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