[BUG] Copying multi-line text creates extra spaces rendering links unusable

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 copying multi-line text from Claude Code's terminal output, the copied text includes hard line breaks at the terminal's wrap points. This makes pasted content unusable — URLs break, commands break, paths break.

Example: Copying a command from Claude Code output and pasting it yields:

cd /Users/ovsh/Documents/code/hyper
  sync/website && vercel link --scope
   digitalpro

Instead of the expected single line:

cd /Users/ovsh/Documents/code/hypersync/website && vercel link --scope digitalpro

This affects URLs, file paths, commands — anything that wraps in the terminal. The pasted text is broken and requires manual cleanup every time.

### What Should Happen?

Copied text should not include line breaks from terminal wrapping. The original continuous text should be preserved when copying.

### Error Messages/Logs

```shell

Steps to Reproduce

1. Have Claude Code output a long command, URL, or path that wraps across multiple lines in the terminal
2. Select and copy that text
3. Paste it somewhere — the text has hard line breaks at wrap points

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.42

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_