Mouse tracking state not reset on exit (/exit) #38860

Description

When exiting opencode using the /exit command, raw SGR mouse tracking escape sequences are printed to the terminal instead of being properly cleaned up.

Terminal: Ptyxis (GTK4/GNOME) — https://gitlab.gnome.org/chergert/ptyxis
Shell: zsh
OS: Linux

Plugins

No response

OpenCode version

1.18.5

Steps to reproduce

1. Open a terminal
2. Run opencode
3. Exit using /exit
4. Observe raw escape sequences printed in the terminal
   Expected behavior: Terminal state is fully restored after exit.
   Actual behavior: Raw SGR mouse tracking sequences are printed:
   ^[[<35;49;13M%
   ^[[<35;91;9M%
   These are mouse press events in SGR extended mouse mode (^[[<button;column;row M), indicating mouse tracking was enabled but not properly disabled on exit.
   Workaround: Running printf '\e[?1000l\e[?1003l\e[?1006l' after exit restores normal terminal behavior.

Screenshot and/or share link

https://opncd.ai/share/h5qhCFLz

Operating System

Ubuntu 26.04 LTS

Terminal

Terminal: Ptyxis (GTK4/GNOME) — https://gitlab.gnome.org/chergert/ptyxis