• Add {cmd: <shell>} value for stop to run a shell command as the stop
  action (useful for tools like podman compose that don't respond to
  signals reliably)
• Fix client hang under terminal backpressure by using async stdout writes
• Fix server panic when a client disconnects during render
• Fix arrow key double-fire on Windows Terminal Preview (#215)
• Less noicy logs, mprocs.log is only created on "error" level logs
• Show never-started procs in gray instead of red (#212)