Enatega SingleVendor Admin Allowing Negative Values in Discount, Stock, and Price Fields

Describe the bug
I have identified a critical issue in the Enatega SingleVendor Admin system where it currently allows users to input negative values in fields related to discount, stock, price, and potentially other crucial parameters.

To Reproduce
Steps to reproduce the behavior:

Log in to the Enatega SingleVendor Admin system.
Navigate to the product management section or any relevant area where discount, stock, or price fields are editable.
Attempt to input a negative value in the discount, stock, or price fields.
Expected behavior
Log in to the Enatega SingleVendor Admin system.
Navigate to the product management section or any relevant area where discount, stock, or price fields are editable.
Attempt to input a negative value in the discount, stock, or price fields.

Screenshots
image

Desktop:

Browser : chrome
Additional context
Please investigate and address this issue promptly to ensure the Enatega SingleVendor Admin system maintains a high level of reliability and accuracy in data processing.

Thank you for your attention to this matter.

从 Enatega SingleVendor Admin 系统的产品管理部分开始，使用 Chrome 在折扣、库存和价格字段中重现该问题。跟踪这些输入的表单处理，并确定其他关键参数是否具有相同的行为。当指定字段拒绝负值且预期行为得到验证时，即表示完成。

由索引模型根据 Issue 内容生成。