[Bug]: 智能体提示词bug

[gkqsz]

Issue Checklist

• I understand that issues are for feedback and problem solving, not for complaining in the comment section, and will provide as much information as possible to help solve the problem.
• I've looked at pinned issues and searched for existing Open Issues, Closed Issues, and Discussions, no similar issue or discussion was found.
• I've filled in short, clear headings so that developers can quickly identify a rough idea of what to expect when flipping through the list of issues. And not "a suggestion", "stuck", etc.

Platform

Windows

Version

0.9.27

Bug Description

创建智能体时，提示词是必填项，而修改智能体时，提示词则不为必填项了。这是一个bug，根据实际的软件使用体验和情况，希望修改提示词为非必填项。

Steps To Reproduce

1.创建智能体处，提示词为必填项
2.打开智能体-我的，提示词就不为必填项了

Expected Behavior

这是一个bug，根据实际的软件使用体验和情况，希望修改提示词为非必填项。

Relevant Log Output

Additional Context

No response