/**
 * DTO for error response.
 * Used to return detailed error information to the client.
 */
export declare class ErrorResponseDto {
    /**
     * A unique and specific error code for programmatic error handling.
     * @example 400
     */
    code: number;
    /**
     * A developer-friendly error message or an array of messages.
     * This can be a single string for a general error, or an array for multiple validation errors.
     * @example "Validation failed"
     * @example ["email must be an email", "password must be at least 8 characters"]
     */
    errors?: string[] | string;
}