feat: 实现日历提醒 in-app fallback 机制及通知服务重构

apps/lib/shared/widgets/detail_header_action_menu.dart

@@ -8,12 +8,14 @@ class DetailHeaderActionItem<T> {
     required this.label,
     required this.icon,
     this.isDestructive = false,
+    this.enabled = true,
   });
 
   final T value;
   final String label;
   final IconData icon;
   final bool isDestructive;
+  final bool enabled;
 }
 
 class DetailHeaderActionMenu<T> extends StatefulWidget {
@@ -141,7 +143,7 @@ class _DetailHeaderActionMenuState<T> extends State<DetailHeaderActionMenu<T>> {
   Widget _buildMenuItem(DetailHeaderActionItem<T> item) {
     final textColor = item.isDestructive
         ? AppColors.red500
-        : AppColors.slate700;
+        : (item.enabled ? AppColors.slate700 : AppColors.slate400);
     final pressedColor = item.isDestructive
         ? AppColors.feedbackErrorSurface
         : AppColors.surfaceInfoLight;
@@ -152,9 +154,9 @@ class _DetailHeaderActionMenuState<T> extends State<DetailHeaderActionMenu<T>> {
         color: Colors.transparent,
         child: InkWell(
           borderRadius: BorderRadius.circular(AppRadius.md),
-          splashColor: pressedColor,
-          highlightColor: pressedColor,
-          onTap: () => _handleSelect(item.value),
+          splashColor: item.enabled ? pressedColor : Colors.transparent,
+          highlightColor: item.enabled ? pressedColor : Colors.transparent,
+          onTap: item.enabled ? () => _handleSelect(item.value) : null,
           child: Padding(
             padding: const EdgeInsets.symmetric(horizontal: AppSpacing.md),
             child: Row(