ShowOverlay was declared in the Command enum but the daemon dispatcher had
no arm for it, so it fell through to `_ => {}`. Nothing could open the HUD
once it was closed except the --menu toggle path.
- daemon: spawn_overlay_once() checks the overlay pid file for a live
process and launches `scythe --menu` only when none is running, so
repeated requests cannot stack overlays
- cli: `scythe --show-overlay` sends the command, falling back to a direct
launch when the daemon is unreachable
Fourteen config keys were persisted and shown in the settings UI while no
capture, encoder, muxer or daemon path ever read them. Removed from
ScytheConfig, from the overlay state, and from their UI panels:
capture_source, replay_storage, change_resolution, resolution_w/h,
container_format, show_scroll_lock_led, autostart_on_game,
save_folder_by_game, name_by_game, language, ui_color_theme, record_enabled.
Unknown JSON keys are ignored by serde, so existing configs still load.
The e2e script also unlinked a live daemon's socket: it ran rm -f on the
socket path unconditionally and only stopped the systemd unit, so a daemon
started by execs.lua or by hand kept its flock while losing its path entry,
leaving the session broken until the process died. It now sends StopDaemon,
waits for the socket to disappear, and aborts without unlinking if the
daemon will not stop.
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