/**
 * Anonymous view-dedup id (design doc §7.4): a rotating, non-PII identifier
 * used by the backend to dedup anonymous-reader view events within a 30-minute
 * window. This is intentionally NOT a session id — it's stored long-lived
 * (1 year TTL) in localStorage so the same anonymous reader is recognized
 * across visits, but it carries no PII and rotates once it expires.
 *
 * Mirrors the storage shape used by `src/auth/storage.ts` (localStorage +
 * explicit TTL), just keyed differently and with no auth semantics at all.
 */
/**
 * Returns the persisted anonId, generating and storing a new one the first
 * time it's needed (or after the previous one has expired/TTL'd out).
 */
export declare function getOrCreateAnonId(): string;