/**
 * DTO for admin setting a user's preferred MFA device.
 *
 * @example
 * ```typescript
 * const dto: AdminSetPreferredDeviceDTO = {
 *   sub: 'user-uuid',
 *   deviceId: 123
 * };
 * ```
 */
export declare class AdminSetPreferredDeviceDTO {
    /**
     * User identifier (UUID).
     */
    sub: string;
    /**
     * MFA device ID to set as preferred.
     * Automatically converted from string path parameters to number.
     */
    deviceId: number;
}
/**
 * Response DTO for admin setting preferred device.
 */
export declare class AdminSetPreferredDeviceResponseDTO {
    /**
     * Success message.
     */
    message: string;
}
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