/**
 * Story 3.6 — view filter state codec (deterministic, DOM-free).
 */
import type { HealthBand, IssueKind } from "../types.js";
export interface ViewFilterState {
    search: string;
    bands: HealthBand[];
    unscored: boolean;
    confidence: number;
    issueKinds: IssueKind[];
}
/** Canonical JSON encoding for hash + slug. */
export declare function encodeViewState(state: ViewFilterState): string;
export declare function decodeViewState(raw: string): ViewFilterState;
/** Deterministic slug from encoded state (no time/randomness). */
export declare function slugifyViewState(state: ViewFilterState): string;