Uninstall cleans up after itself; a shorter install command

- desktops.sh uninstall also removes Launch as Standalone's app copies
  and the title bar decoration, and Display Settings' uninstall the
  profiles' launcher entries; its install writes them back from the
  saved profiles (new: ft-layout launchers)
- the README says which settings an uninstall leaves
- the install command is now curl -fsSL https://deejanuz.github.io/
  frametop/get.sh | bash (GitHub Pages, from main)
- ft-gaze logs "action manifest ...: ok" instead of "error 0"

Found in a clean install test on the Frame (2026-10-01): uninstall,
then get.sh from the headset into a fresh clone; everything installed
and doctor.sh passed.

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

desktops.sh

@@ -40,7 +40,12 @@ $running && echo 'started' || { echo 'failed:'; tail -20 $log; exit 1; }" ;;
 sed 's|@SESSION@|$session/frametop-session.sh|' $session/deckard-nested-desktop.desktop > ~/$override
 [ -f ~/.config/frametop.conf ] || cp $session/frametop.conf.example ~/.config/frametop.conf
 echo \"installed ~/$override\"; grep ^Exec= ~/$override; echo; cat ~/.config/frametop.conf" ;;
-  uninstall) "$frame" --host "rm -f ~/$override && echo 'removed; the launcher uses the stock desktop again'" ;;
+  uninstall)
+    # Also what the session puts in place at each start: Launch as Standalone's app copies and
+    # the title bar decoration (float/ft_apps.py, decoration/).
+    "$frame" --host "rm -f ~/$override
+rm -rf ~/.local/share/frametop/apps ~/.local/share/kwin/decorations/kwin4_decoration_qml_frametop
+rmdir ~/.local/share/frametop 2>/dev/null; echo 'removed; the launcher uses the stock desktop again'" ;;
   screens)
     [[ ${2:-} =~ ^[1-9]$ ]] || { echo "usage: $0 screens N   (1-9)" >&2; exit 2; }
     "$frame" --host "set -e; f=~/.config/frametop.conf