/**
 * 📢 Version announcements for existing users
 */
/**
 * Show v2.4.0 announcement to existing users
 */
export declare function showV240Announcement(): void;
/**
 * Show update available notice (brief)
 */
export declare function showUpdateAvailable(currentVersion: string, latestVersion: string): void;
/**
 * Critical update notice (security, breaking changes)
 */
export declare function showCriticalUpdate(message: string): void;
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