[Bug]: Third-party platform models cannot call tools

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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.
• My issue is not listed in the FAQ.
• 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.
• I've confirmed that I am using the latest version of Cherry Studio.

Platform

Windows

Version

2.1.3

Bug Description

Using models from third-party platforms like AiOnly to call MCP tools, or uploading attachments results in HTTP error 400.

Error name: AI_APICallError Error message: Stack trace: null Status code: 400

Steps To Reproduce

1. Select a third-party platform model
2. Write a prompt asking to use MCP tool XX to do something
3. Return error message

Expected Behavior

Should execute normally

Relevant Log Output

Additional Context

No response

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.
• My issue is not listed in the FAQ.
• 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.
• I've confirmed that I am using the latest version of Cherry Studio.

Platform

Windows

Version

2.1.3

Bug Description

使用AiOnly等平台的模型调用MCP工具，或者上传附件会提示http错误400

错误名称: AI_APICallError 错误信息: 堆栈信息: null 状态码: 400

Steps To Reproduce

1.选择三方平台的模型 2.提示词写使用MCP工具XX做什么事 3.返回错误提示

Expected Behavior

能够正常执行

Relevant Log Output

Additional Context

No response