[Feature]: 智能体、助手提示词加入【变量】和【自定义输入框】功能

[ZHE-HUB]

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.
• I have provided a short and descriptive title so that developers can quickly understand the issue when browsing the issue list, rather than vague titles like "A suggestion" or "Stuck."
• The latest version of Cherry Studio does not include the feature I am suggesting.

Platform

Windows

Version

v0.9.29

Is your feature request related to an existing issue?

设置一个智能体，并且有多项要输入的内容，我想把它嵌入到系统提示词的某个位置，且在使用中有独立的输入框指定输入类型。这样可以制作出
有独特功能的智能体。但是现在有的功能做不到。只能预设一段固定的提示词。

Desired Solution

智能体加入【变量】和【自定义输入框】，类似dify这种。可以将用户输入的提示词嵌入到预设的位置，应该不会很麻烦，但用处很大，可以极大的丰富智能体的使用方式。

Alternative Solutions

No response

Additional Information

No response

[lioensky]

支持

[lioensky]

最关键的是要允许ai可以setvar和addvar!

[T-Atlas]

支持

[lanbinleo]

支持，比如定义一个消息模板，允许用户传入一些系统变量到消息模板中，比如日期、时间、操作系统、用户名字这样的。

[kvn1351]

Please add support for this! It's rather important to have the model know the time and date.

[EurFelux]

Hello! We now support prompt variables for date and time. You can use prompt template variables in the prompt settings of the assistant settings. In the next version, a {{username}} variable will also be added for use.

[kvn1351]

Thanks a lot! This is great

[EurFelux]

新版本已经支持了部分预设变量。