Fix: read files from symlink directory in background selector menu (#5524)

* Fix: read files from symlink directory in background selector menu

* safely parse the path to avoid option injection

* Simply use -L flag with find to resolve symlinks

default/elephant/omarchy_background_selector.lua

@@ -46,7 +46,7 @@ function GetEntries()
 
   for _, wallpaper_dir in ipairs(dirs) do
     local handle = io.popen(
-      "find " .. ShellEscape(wallpaper_dir)
+      "find -L " .. ShellEscape(wallpaper_dir)
         .. " -maxdepth 1 -type f \\( -name '*.jpg' -o -name '*.jpeg' -o -name '*.png' -o -name '*.gif' -o -name '*.bmp' -o -name '*.webp' \\) 2>/dev/null | sort"
     )
     if handle then