export type ViewerStoreRow = {
    key: string;
    value: string;
};
export type ViewerEnvConfig = {
    variables: ViewerStoreRow[];
    headerGroups: Record<string, ViewerStoreRow[]>;
    /** Name of the variable holding the base URL — renameable, e.g. `ONBOARDING_SERVICE`. */
    baseUrlKey?: string;
};
export type ViewerEnvStore = {
    activeEnv: string;
    activeGroup: string;
    envs: Record<string, ViewerEnvConfig>;
};
/** Validate / coerce UI store JSON. Returns null if unusable. */
export declare function normalizeViewerEnvStore(raw: unknown): ViewerEnvStore | null;
export declare function readViewerEnvStore(): ViewerEnvStore | null;
export declare function writeViewerEnvStore(raw: unknown): ViewerEnvStore;
/**
 * If viewer-store.json is missing, seed it from the resolved env presets
 * (derived from baseUrl, plus any `envPresets` overrides in daxta.config).
 * Does not overwrite an existing file.
 */
export declare function ensureViewerStoreSeeded(): string | null;