[Bug/Feature Request] Add a custom User-Agent feature in the AI settings

[WHYBBE]

If the OpenAI-dotnet library does not set/override the User-Agent, it will automatically use a strange User-Agent, and many AI proxy services have policies that directly filter requests with this User-Agent, thus returning 403 errors (this is my guess about the reason).

User-Agent: OpenAI/2.9.1 (.NET 10.0.5; Microsoft Windows 10.0.26200)
So is it possible to add a feature for a custom User-Agent to avoid this issue?

Or are there any other good ways to solve this problem?

[love-linger]

What's the service URL do you use?

[WHYBBE]

What's the service URL do you use?

It's a bit hard to describe the type of service I'm using. They are some services proxied through NewAPI (relay stations), and they may have some Cloudflare policies configured, which is probably why it causes a 403. But in fact, using curl or other LLM chat clients is allowed, and using OpenAI-dotnet with a blank User-Agent is also allowed.