The custom Porta.Pty bypass (own read loop, key tunneling, resize sync) rendered
wrong, lagged, and dropped input. The spike proved TerminalControl.LaunchProcess()
renders correctly and stays responsive, so hand pty/input/render/resize/focus back
to the library. PtyTerminalSession shrinks to a thin wrapper: apply descriptor.Env
process-wide (Porta.Pty inherits the process env; no per-launch env seam), set
Process/Args/StartingDirectory, LaunchProcess(). Process="" still suppresses the
control's auto-launch so exactly one process starts.
mika kuns
2b06ab0ab4