[UX] Add "press Enter" hint to auth code paste 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?

During /login when pasting the online generated code back to the terminal (here: Powershell), the prompt changes to "..." but it did not continue (which has been the expectation). I'm using version 2.1.185.

What Should Happen?

I found it to be just missing an enter keystroke. To help others in this case one could change the prompt to something like: "Paste code here if prompted and press Enter". This is my simple suggestion.

Error Messages/Logs

Steps to Reproduce

Start claude in Powershell
type /login
copy the url to your browser (c) and accept
copy the generated key back to the terminal Ctrl-V
-- here the expectation was that on copying the process would continue

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.185

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_