[BUG] Can't stash image-only prompt

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

If you add some images to the prompt then try to ctrl + s to stash it, nothing happens. Workaround is to type some dummy text.

What Should Happen?

It should be possible to stash image-only / attachment-only prompts

Error Messages/Logs

Steps to Reproduce

1. Paste an image into the prompt
2. Press ctrl + s to stash
3. Nothing happen

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.45

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_