/feedback command fails silently on retry after initial error

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report
• [x] I am using the latest version of Claude Code

What's Wrong?

<img width="605" height="289" alt="Image" src="https://github.com/user-attachments/assets/edf5d818-6f1b-4c54-ae1b-7f7ccdc998d1" />

When using /feedback (or /bug):

1. First attempt shows a generic error message "Could not submit feedback. Please try again later." "Edit and press Enter to retry, or Esc to cancel"
2. On retry, the command exits silently with no indication of whether the submission succeeded or failed (was it simply the first attempt that failed? Or both?)

<img width="509" height="151" alt="Image" src="https://github.com/user-attachments/assets/32305f13-fda4-4860-bc10-a41b669dda48" />

Even if the root cause is a transient network issue, the user should get clear feedback on whether their submission was sent successfully or not.

What Should Happen?

• On success: show a confirmation message (e.g., "Feedback submitted successfully")
• On failure: show a clear error with details (e.g., "Submission failed: network timeout. Please try again.")
• Never exit silently without indicating the outcome

Steps to Reproduce

1. Run /feedback
2. Type feedback message and submit
3. Observe error on first attempt
4. Retry when prompted
5. Command exits with no confirmation or error

Claude Code Version

2.1.56

Platform

Anthropic API

Operating System

macOS (Darwin 25.2.0)

Terminal/Shell

zsh

Additional Information

Related to #22971 but different symptoms — this is about submission failure handling, not input cancellation.