Settings -> Terminal gains a 'Show script trace in terminal' checkbox
(AppSettings.ShowScriptTrace, default on). When off, TTL trace lines
([wait] progress, sent-command echo, errors) are no longer drawn in
the terminal. dispstr moves to a dedicated Display event and always
shows, since it is the script explicitly printing something.
Trace was already display-only (never written to session logs, the AI
serial bridge, or the device) - docs now state this explicitly.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>