[Feature]: 使用deepseek r1时，支持把system message当作role="user"的message传输

[acsaga]

Issue Checklist

• I understand that issues are for reporting problems and requesting features, not for off-topic comments, and I will provide as much detail as possible to help resolve the issue.
• I have checked the pinned issues and searched through the existing open issues, closed issues, and discussions and did not find a similar suggestion.
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Platform

Windows

Version

v0.9.27

Is your feature request related to an existing issue?

根据 https://huggingface.co/deepseek-ai/DeepSeek-R1#usage-recommendations ，第二条标粗了”Avoid adding a system prompt; all instructions should be contained within the user prompt.“
所以，对于deepseek r1，在调用api时把第一条默认的role="system"改成role="user"可能会得到更好的结果？

Desired Solution

我不太确定第三方的deepseek r1 api是否强制必须有role="system"的消息。
可能可以在”提示词设置“页面，加一个选项，让用户可以选择助手的提示词是以role="system"或者role="user"发送比较好？

Alternative Solutions

No response

Additional Information

No response