ask_user  form: pressing Enter early submits/cancels and permanently discards the in-progress typed answer

Describe the bug

Severity: High (data loss — user-authored content is unrecoverable)

Impact: Loss of substantial user-typed input; forces the user to re-type from scratch and erodes trust in the form UI.

Suggested fixes: Draft autosave/restore for elicitation forms; make Enter insert a newline in text fields (submit via a distinct key like Ctrl+Enter); on cancel/escape, stash the draft (similar to  ctrl+s  stash/pop) rather than discarding it.

Affected version

GitHub Copilot CLI 1.0.83

Steps to reproduce the behavior

What happened: While typing a long free-text answer into an agent  ask_user  elicitation form, I pressed Enter before finishing. This submitted/advanced the form, and when I hit Escape to get back, my entire in-progress answer was erased with no way to recover it.

Expected behavior

Expected: Either (a) Enter in a multi-line form field should insert a newline (require an explicit submit action/confirmation to send), and/or (b) an accidental submit/escape should preserve the drafted text (e.g., restore it into the input buffer, or offer undo/ ctrl+r -style recovery). Long answers should never be silently, irrecoverably lost.

Additional context

No response

Empieza reproduciendo el flujo de Enter anticipado y Escape en el formulario de elicitación de ask_user, y después inspecciona cómo se gestiona la entrada de texto al enviar y cancelar. Se considera terminado cuando los borradores largos no se descartan de forma irrecuperable y el comportamiento de envío elegido es claro y está probado frente a pulsaciones accidentales de teclas.