/**
 * Claude API Key 저장/로드
 */
export declare function loadApiKey(): string | null;
export declare function saveApiKey(apiKey: string): void;
export declare function removeApiKey(): boolean;
export declare function hasApiKey(): boolean;
/**
 * API Key 마스킹 (key***last4)
 */
export declare function maskApiKey(key: string): string;
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