refactor: 重构 DetailHeaderActionMenu 菜单隐藏逻辑

apps/lib/shared/widgets/detail_header_action_menu.dart

@@ -44,7 +44,7 @@ class _DetailHeaderActionMenuState<T> extends State<DetailHeaderActionMenu<T>> {
 
   @override
   void dispose() {
-    _hideMenu();
+    _removeOverlayEntry();
     super.dispose();
   }
 
@@ -87,9 +87,13 @@ class _DetailHeaderActionMenuState<T> extends State<DetailHeaderActionMenu<T>> {
     setState(() {});
   }
 
-  void _hideMenu() {
+  void _removeOverlayEntry() {
     _menuEntry?.remove();
     _menuEntry = null;
+  }
+
+  void _hideMenu() {
+    _removeOverlayEntry();
     if (mounted) {
       setState(() {});
     }