fix: Shell script lint issue

Author: draphy

uninstall.sh

@@ -111,8 +111,15 @@ remove_configs() {
     # Remove draphyOS wallpaper only (not user's wallpaper)
     # Check if it's the draphyOS wallpaper before removing
     if [ -f "$HOME/.config/wallpaper.png" ]; then
-        # Only remove if it matches draphyOS wallpaper (by checking if backup exists)
-        if [ ! -f "$HOME/.config-backup-"*"/wallpaper.png" ] 2>/dev/null; then
+        # Only remove if no backup exists (meaning it's draphyOS wallpaper)
+        local has_backup=false
+        for backup_wp in "$HOME"/.config-backup-*/wallpaper.png; do
+            if [ -f "$backup_wp" ]; then
+                has_backup=true
+                break
+            fi
+        done
+        if [ "$has_backup" = false ]; then
             rm -f "$HOME/.config/wallpaper.png" 2>/dev/null || true
         fi
     fi