[Feature]: 更换模型的列表里，可以自定义模型的名称

### Class | 类型

None

### Feature Request | 功能请求

用户端实际是看不懂API调用时使用的模型model name的，所以是否可以更换模型列表里显示自定义的模型名称，代码里来做好映射。
比如列表里显示的是"通义千问“，“豆包”等等，而不是qwen-turbo。

Start by locating the user-facing model-selection list and the code that maps API model names to display labels. Confirm how model IDs are passed to API calls, then define completion as showing custom names such as 通义千问 or 豆包 while preserving the original model names for requests.

Written by the indexing model from the issue text.