Ctrl-Z in the new terminal UI no longer suspends kiro-cli

[yunosh]

Before opening, please confirm:

• I have searched for duplicate or closed issues

Operating System

MacOS

Kiro Version

kiro-cli 1.28.1

Bug Description

Using Ctrl+Z suspends the currently running program. This workes with kiro-cli too, as expected. But using the UI with the --tui parameter, this no longer works. This is with iTerm2.

Steps to Reproduce

1. Execute kiro-cli --tui in a terminal
2. Hit Ctrl+Z

Expected Behavior

kiro-cli suspended and back on the shell prompt

Conversation ID

No response

Additional Context

No response

[github-actions]

Thanks for filing this issue! 🙏 It sounds like Ctrl+Z signal handling isn't being passed through properly when running in the new TUI mode, which is a great catch. A maintainer will take a look at this shortly — we appreciate you including the clear repro steps and version details, that really helps!