- Transport Linux AppImage CLI args through SUBMINER_APP_ARGC/ARG_* env vars instead of argv
- Add --app-ping command to probe single-instance lock ownership (exit 0 = running, 1 = not)
- Gate manual restart: poll app-ping until old app releases lock, then until new app owns it
- Preserve user-paused playback when disarming the auto-play-ready gate on restart
- Snapshot subtitles before connection side effects (sub-visibility hide) can suppress them
- Reapply overlay bounds after first show for Hyprland compatibility
