T08: Tab and F6 pass Ely's focus keys; each kitty flag reshapes only what it names; Cmd is Super; repeats and Command key-ups come from AppKit; IME commits stay UTF-8, as in kitty and Ghostty; key.zig out; the line rule reads every text file

Cargo.lock

@@ -1750,6 +1750,7 @@ version = "0.1.0"
 dependencies = [
  "alacritty_terminal",
  "anyhow",
+ "block",
  "core-graphics 0.24.0",
  "dirs 7.0.0",
  "ely-gpui-component",