[BUG] /install-github-app without a Pro account cannot cancel/exit

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?

ran /install-github-app without a Pro account that supports long-lived tokens; no way to abort
once the OAuth prompt appears, Ctrl-C doesn't exit

What Should Happen?

ctrl-c should allow exiting out of loop to enter long-lived key

Error Messages/Logs

❯ /install-github-app                                                                     
                                                                                            
  Create Authentication Token                                                               
                                                                                            
  Creating a long-lived token for GitHub Actions                                            
                                                                                            
                                                                                            
                                                                                            
   Browser didn't open? Use the url below to sign in (c to copy)                            
                                                                                            
  https://claude.com/cai/oauth/authorize?code=true&client_id=9d1c250a-e61b-44d9-88ed-5944d1 
  962f5e&                                                                                   
  response_type=code&redirect_uri=https%3A%2F%2Fplatform.claude.com%2Foauth%2Fcode%2Fcallba 
  ck&scop                                                                                   
  e=user%3Ainference&code_challenge=P28YuH96tFE3Ej0GGlxrLfy6Qzs_5KA3vzJHs_9qLv4&code_challe 
  nge_met                                                                                   
  hod=S256&state=FPF8lK4t15_WSdX1-PSFEN0n--0JxehNhyML1ONQ06s                                
                                                                                            
                                                                                            
   Paste code here if prompted >                                                            
                                                                                            
  ==========                                                                                
                                                                                            
  ❯ /install-github-app                                                                     
                                                                                            
  Create Authentication Token                                                               
                                                                                            
  Creating a long-lived token for GitHub Actions                                            
                                                                                            
                                                                                            
                                                                                            
   OAuth error: Invalid code. Please make sure the full code was copied                     
                                                                                            
   Press Enter to try again, or any other key to cancel

Steps to Reproduce

run /install-github-app without a Pro account

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.138 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_