[Bug] Focus reporting mode (ANSI 1004) not disabled on exit

Question

Focus reporting mode (ANSI 1004) not disabled on exit.

Symptom: After exiting Claude Code, Ghostty terminal gets focus-locked on Hyprland. Mouse cannot leave window, cannot switch focus to other windows.

Cause: Claude Code enables focus reporting (\e[?1004h) but doesn't disable it (\e[?1004l) on exit (normal or crash).

Workaround: Run `printf '\e[?1004l'` after exit, or wrap claude command:
```bash
claude() { command claude "$@"; printf '\e[?1004l'; }
```

Related: #10375