Remove leftovers before a release

- gaze/tracker/lab/eyes_track.py: nothing used it
- Input Settings: the pointer role backend, whose page was removed
- ft-screens: no log line for every floating-window resize
- hands: ft-hands --help gives the palm-down default (1: off), the
  uninstall removes ft-handsctl's link, .frame-job is ignored
- Display Settings: "Save as profile…", not "Save current arrangement"
- two stale comments (ft-pointer's grabprobe, ft-gaze)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

hands/run.sh

@@ -54,7 +54,8 @@ mkdir -p ~/.local/bin && ln -sfn $(printf %q "$FRAME_REPO/hands/ft-handsctl") ~/
 $states; echo 'start it with: ft-handsctl on'" ;;
   caps) set_caps ;;
   uninstall) "$frame" --host "systemctl --user disable --now $units 2>/dev/null
-for u in $units; do rm -f ~/.config/systemd/user/\$u; done; systemctl --user daemon-reload; echo removed" ;;
+for u in $units; do rm -f ~/.config/systemd/user/\$u; done; systemctl --user daemon-reload
+[ -L ~/.local/bin/ft-handsctl ] && rm -f ~/.local/bin/ft-handsctl; echo removed" ;;
   start|stop|restart) "$frame" --host "systemctl --user $1 $units; $states" ;;
   status) "$frame" --host "$states; journalctl --user -u frametop-hands.service --no-pager -o cat -n 4" || true ;;
   log) "$frame" --host "journalctl --user -u frametop-camd.service -u frametop-hands.service --no-pager -o short -n ${2:-30}" ;;