/** In-memory layout for ActionSet drag position (survives SPA navigation, clears on full reload). */
export type ActionSetLayoutSession = {
    tileTopPx: number | null;
};
export declare function readActionSetLayoutSession(): Readonly<ActionSetLayoutSession>;
export declare function writeActionSetLayoutSession(partial: Partial<ActionSetLayoutSession>): void;
/** Test helper to reset in-memory session between cases. */
export declare function resetActionSetLayoutSessionForTests(): void;
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