[FEATURE] Support for IME-friendly slash command input (Korean/Japanese/Chinese)

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Problem

When using an IME (Input Method Editor) for Korean, Japanese, Chinese, etc., typing slash commands like /clear requires:

1. Noticing the IME is in native mode
2. Deleting the incorrectly composed characters (e.g., /치ㅣ instead of /cl)
3. Switching to English mode
4. Retyping /cl + Tab

This breaks the flow constantly, especially for commands used frequently like /clear and /compact.

Proposed Solution

1. Keyboard shortcut alternatives — e.g., Ctrl+L for /clear, Ctrl+Shift+K for /compact
2. IME-aware command matching — detect that /치ㅣ maps to /cl on QWERTY layout and suggest the correct command
3. Custom command aliases — allow users to define aliases in settings (e.g., map /클리어 to /clear)

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

• OS: Windows 11, Korean IME (Microsoft IME)
• The / key itself works in both modes, but subsequent characters get composed in the active IME language
• This likely affects all CJK IME users