MiMo and other Chinese OpenAI-compatible providers fail with 'Param Incorrect'

[Fatty911]

Bug Description

When using OpenAI-compatible providers like MiMo, GLM, or Qwen, OpenCode forces for all providers. This translates to in the API request.

However, these providers do not support the parameter and return a 'Param Incorrect' error, making them completely unusable.

Affected Providers

• MiMo (api.xiaomimimo.com)
• Zhipu/GLM (open.bigmodel.cn)
• Alibaba/Qwen (dashscope.aliyuncs.com)
• Baidu/Qianfan (qianfan.baidubce.com)
• And others

Steps to Reproduce

1. Configure a MiMo provider in opencode.json
2. Try to use any MiMo model
3. Error: 'Param Incorrect'

Expected Behavior

OpenCode should not force for providers that don't support .

Proposed Solution

Use URL host detection to identify incompatible providers and skip forcing for them, while maintaining backward compatibility for compatible providers.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• 小米模型Mimo使用CC Switch接入的问题 #27273: Reports the same 'Param Incorrect' error when using MiMo (Xiaomi) models via an OpenAI-compatible provider

If your issue is different or covers additional providers/root causes, please add a comment clarifying how it differs.