ImageResponse cannot be parsed by Spring MVC as a ModelResponse object.

[NingNing0111]

Bug description

I'm attempting to return the ImageResponse as a ModelResponse, which passes successfully in unit tests but fails on Spring MVC.

Environment

• Spring AI 0.8.1-SNAPSHOT
• Java 17

Steps to reproduce

Expected behavior

I'm currently trying to get a chat response and an image response by inputting prompt , so need to return it as a ModelResponse.But, an exception occurred during the deserialization of ImageResponse。

Minimal Complete Reproducible example

Refer to the image above.

[markpollack]

fixed in ac518df

Thanks!