[BUG] /export `Copy to clipboard` freezes claude-code

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?

When I use the slash command /export, there are two options:

> /export
╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│                                                                                                                                                                                                                                                                                                                             │
│ Export Conversation                                                                                                                                                                                                                                                                                                         │
│                                                                                                                                                                                                                                                                                                                             │
│ Select export method:                                                                                                                                                                                                                                                                                                       │
│                                                                                                                                                                                                                                                                                                                             │
│ ❯ 1. Copy to clipboard   Copy the conversation to your system clipboard                                                                                                                                                                                                                                                     │
│   2. Save to file        Save the conversation to a file in the current directory                                                                                                                                                                                                                                           │
│                                                                                                                                                                                                                                                                                                                             │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
  Esc to cancel

Pressing enter on 1. leaves CC unresponsive. Up / down, escape, etc don't work. The UI doesn't update on the status of the operation.

Thankfully, it does copy the conversation to clipboard.

Ghostty
Ubuntu

What Should Happen?

• Some feedback re: the copying operation
• continued functioning of the tui

Error Messages/Logs

Steps to Reproduce

1. have a conversation in CC
2. run /export
3. use the copy to clipboard option

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.36 (Claude Code)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_