Improve Korean (Hangul) input in the terminal — composing text is not visible

Request

Korean (Hangul) input in the interactive prompt is hard to use: the IME composing (pre-edit) text is not shown in the input box, so you cannot see what you are typing until each syllable/word is committed. The same terminal works fine with Codex and Claude Code.

Please improve Hangul input handling in the terminal TUI so composing text is visible while typing.

Environment

• Command Code 1.56.0 (latest)
• macOS arm64 (Darwin 25.6.0)
• iTerm2 3.6.11, TERM=xterm-256color, LANG=ko_KR.UTF-8, Korean 2-set IME

Steps to reproduce

1. Run cmd in iTerm2 with the Korean IME active
2. Focus the prompt input and type 한글
3. No pre-edit is displayed while composing - only the committed text appears

Notes

• dist/cli.mjs has no composition handling at all (isComposing, compositionupdate, preedit, markedText: zero occurrences), and the kitty keyboard protocol is pushed at startup (resolveKittyKeyboard with disambiguateEscapeCodes). There is no setting, config key, or env var to opt out.
• ctrl+g (external editor) is the only usable workaround right now.

Beginne damit, das Problem in der interaktiven Eingabeaufforderung mit der koreanischen 2-set-IME zu reproduzieren. Untersuche anschließend dist/cli.mjs und den Startpfad rund um resolveKittyKeyboard und disambiguateEscapeCodes. Verfolge, wie Terminaleingaben die TUI erreichen, und identifiziere, wo Kompositionsereignisse verarbeitet werden. Erledigt ist die Aufgabe, wenn Hangul-Pre-Edit-Text während der Eingabe sichtbar ist und festgeschriebener Text weiterhin korrekt funktioniert.