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

apps/lib/shared/widgets/app_selection_sheet.dart

@@ -0,0 +1,117 @@
+import 'package:flutter/material.dart';
+
+import '../../core/theme/design_tokens.dart';
+import 'app_button.dart';
+
+class AppSelectionItem<T> {
+  const AppSelectionItem({required this.value, required this.label});
+
+  final T value;
+  final String label;
+}
+
+Future<T?> showAppSelectionSheet<T>(
+  BuildContext context, {
+  required String title,
+  required List<AppSelectionItem<T>> items,
+  required T? selectedValue,
+}) async {
+  final result = await showModalBottomSheet<T>(
+    context: context,
+    isScrollControlled: true,
+    backgroundColor: Colors.transparent,
+    builder: (sheetContext) {
+      return SafeArea(
+        top: false,
+        child: Container(
+          margin: const EdgeInsets.fromLTRB(
+            AppSpacing.md,
+            AppSpacing.none,
+            AppSpacing.md,
+            AppSpacing.md,
+          ),
+          padding: const EdgeInsets.symmetric(vertical: AppSpacing.lg),
+          decoration: BoxDecoration(
+            color: AppColors.white,
+            borderRadius: BorderRadius.circular(AppRadius.xl),
+            border: Border.all(color: AppColors.borderSecondary),
+          ),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: AppSpacing.lg),
+                child: Text(
+                  title,
+                  textAlign: TextAlign.center,
+                  style: const TextStyle(
+                    fontSize: 17,
+                    fontWeight: FontWeight.w700,
+                    color: AppColors.slate900,
+                  ),
+                ),
+              ),
+              const SizedBox(height: AppSpacing.md),
+              ...items.map((item) {
+                final isSelected = item.value == selectedValue;
+                return _buildItem(
+                  sheetContext,
+                  item: item,
+                  isSelected: isSelected,
+                );
+              }),
+              const SizedBox(height: AppSpacing.sm),
+              const Divider(height: 1, color: AppColors.border),
+              const SizedBox(height: AppSpacing.sm),
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: AppSpacing.lg),
+                child: SizedBox(
+                  height: 48,
+                  child: AppButton(
+                    text: '取消',
+                    isOutlined: true,
+                    onPressed: () => Navigator.of(sheetContext).pop(),
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      );
+    },
+  );
+  return result;
+}
+
+Widget _buildItem<T>(
+  BuildContext sheetContext, {
+  required AppSelectionItem<T> item,
+  required bool isSelected,
+}) {
+  return InkWell(
+    onTap: () => Navigator.of(sheetContext).pop(item.value),
+    child: Container(
+      padding: const EdgeInsets.symmetric(
+        horizontal: AppSpacing.lg,
+        vertical: AppSpacing.md,
+      ),
+      child: Row(
+        children: [
+          Expanded(
+            child: Text(
+              item.label,
+              style: TextStyle(
+                fontSize: 15,
+                fontWeight: isSelected ? FontWeight.w600 : FontWeight.w500,
+                color: isSelected ? AppColors.blue600 : AppColors.slate800,
+              ),
+            ),
+          ),
+          if (isSelected)
+            const Icon(Icons.check, size: 20, color: AppColors.blue600),
+        ],
+      ),
+    ),
+  );
+}

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(