Caps Lock key prints raw Kitty protocol escape sequence [57358u

Description

When pressing the Caps Lock key inside Claude Code, the raw escape sequence [57358u is printed into the input field instead of being handled silently.

Environment

• Platform: Windows 11 Home 10.0.26200
• Claude Code version: CLI
• Shell: bash

Steps to Reproduce

1. Open Claude Code
2. Press Caps Lock while the input field is focused
3. [57358u appears in the input

Expected Behavior

Caps Lock should toggle silently without printing anything.

Actual Behavior

The Kitty keyboard protocol escape sequence [57358u (keycode 57358 = Caps Lock) is printed as raw text.