Win32 input emits Esc down+up with uChar=27 so Claude Code sees 0x1b;
kitty flags encode CSI 27u instead of a bare escape. The TABS plus
button now creates the configured default shell; the dots keep the
profile picker. Plus/dots use the old 20px chrome size.
Checkpoint remaining GPUI parity work in the tree (settings rewrite,
math overlay, SSH settings, SVN status).