Improve spinner subprocess and trap cleanup handling

lib/clean/app_caches.sh

@@ -241,12 +241,9 @@ clean_remote_desktop() {
 
 # Main function to clean all user GUI applications
 clean_user_gui_applications() {
-    start_section_spinner "Scanning app caches..."
-
-    clean_xcode_tools
-
     stop_section_spinner
 
+    clean_xcode_tools
     clean_code_editors
     clean_communication_apps
     clean_dingtalk

lib/core/ui.sh

@@ -255,7 +255,10 @@ start_inline_spinner() {
 
     if [[ -t 1 ]]; then
         (
-            trap 'exit 0' TERM INT EXIT
+            # Clean exit handler for spinner subprocess
+            cleanup_spinner() { exit 0; }
+            trap cleanup_spinner TERM INT EXIT
+
             local chars
             chars="$(mo_spinner_chars)"
             [[ -z "$chars" ]] && chars="|/-\\"