[BUG] OAuth URL wraps onto two lines in narrow terminals causing "Unknown scope" error on headless Linux

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 running claude in a headless SSH terminal with no browser installed,
the OAuth URL is too long and wraps onto a second line. The 'c' shortcut
to copy does not work in SSH terminals. When manually selecting and copying
the wrapped URL, a line break and spaces are inserted in the middle of the
scope parameter.

Pasting this into a browser gives:
"Invalid OAuth Request: Unknown scope: us"
"Invalid OAuth Request: Unknown scope: org:create_"

What Should Happen?

The OAuth URL should be printed as a single unbroken line regardless of terminal width,
so it can be copied and pasted into a browser without modification.

Alternatively, the 'c' shortcut to copy the URL should work in SSH/headless terminals,
or a QR code option should be provided (similar to how gh auth login handles headless setups).

Error Messages/Logs

Invalid OAuth Request
Unknown scope: us

and

Invalid OAuth Request  
Unknown scope: org:create_

Steps to Reproduce

1. SSH into a headless Linux machine (no browser installed)
2. Install Claude Code: curl -fsSL https://claude.ai/install.sh | bash
3. Run: claude
4. Select Pro/Max login option
5. Terminal displays OAuth URL but it wraps onto two lines
6. Press 'c' to copy — does not work in SSH terminal
7. Manually select and copy the URL — line break and spaces are included
8. Paste into browser on another machine
9. Browser shows "Invalid OAuth Request: Unknown scope: us" or "Unknown scope: org:create_"

Workaround: paste URL into text editor first, manually delete the spaces/line break,
then paste the clean URL into browser

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.66

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

Device: NVIDIA Jetson Orin Nano
OS: Ubuntu 22.04.5 LTS (GNU/Linux 5.15.148-tegra aarch64)
Connection: Headless, accessed via SSH from Mac

The 'c' copy shortcut likely fails because SSH terminals don't support
the clipboard access that Claude Code expects.

The URL line-wrap issue affects all headless Linux users (servers,
Jetson, Raspberry Pi, cloud VMs) — a very common deployment scenario.

Simple fix on Anthropic's end: print the full URL as one unbroken string
using a non-wrapping print method, regardless of terminal width.

Related issue: #20325 (same error, different root cause)