说明：  本项目是一个为硬件商店设计的库存管理系统。它允许用户管理供应库存，包括螺钉、工具、锁具设备等物品。该系统以面向对象的编程语言实现，并为员工和所有者提供不同的功能。
(This project is an inventory management system designed for a hardware store. It allows users to manage supply inventory, including articles such as screws, tools, locksmithing equipment, etc. The system is implemented in an object-oriented programming language and features distinct functionalities for both employees and owners.)