[Bug]: CLI Doesn't Accept Attachments That Are Not Images

[angelplusultra]

Describe the bug

When trying to attach non-image files such as PDFs, the API rejects the chat request saying the file type is not supported.

Steps to reproduce

1. Run any p "summarize this file" -a ./file/to/pdf.pdf
2. See logs for error output

Expected behavior

The server accepts the attachment and includes it as context before the prompt.

Actual behavior

Aborts the stream with 400 Invalid 'input[31].content[1].image_url'. Expected a base64-encoded data URL with an image MIME type (e.g. 'data:
image/png;base64,aW1nIGJ5dGVzIGhlcmU='), but got unsupported MIME type 'application/pdf'.