Preserve user state during theme setup

install/user/theme.sh

@@ -1,13 +1,14 @@
-# Setup user theme folder
+# Setup user theme folder and seed the default only when no theme exists yet.
 mkdir -p ~/.config/omarchy/themes
 
-if [[ ${OMARCHY_SETUP_CONTEXT:-runtime} == "iso-chroot" ]]; then
-  OMARCHY_THEME_HEADLESS=1 omarchy-theme-set "Tokyo Night"
-else
-  omarchy-theme-set "Tokyo Night"
+if [[ ! -s $HOME/.local/state/omarchy/current/theme.name ]]; then
+  if [[ ${OMARCHY_SETUP_CONTEXT:-runtime} == "iso-chroot" ]]; then
+    OMARCHY_THEME_HEADLESS=1 omarchy-theme-set "Tokyo Night"
+    rm -f ~/.config/chromium/SingletonLock # otherwise archiso owns the Chromium singleton
+  else
+    omarchy-theme-set "Tokyo Night"
+  fi
 fi
-
-rm -rf ~/.config/chromium/SingletonLock
 omarchy-theme-set-pi --activate
 
 mkdir -p ~/.config/btop/themes