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

apps/lib/features/todo/ui/screens/todo_edit_screen.dart

@@ -12,6 +12,7 @@ import '../../../../shared/widgets/full_screen_loading.dart';
 import '../../../../shared/widgets/toast/toast.dart';
 import '../../../../shared/widgets/toast/toast_type.dart';
 import '../../../calendar/data/calendar_api.dart';
+import '../../../calendar/data/models/schedule_item_model.dart';
 import '../../data/todo_api.dart';
 
 class TodoEditScreen extends StatefulWidget {
@@ -88,6 +89,7 @@ class _TodoEditScreenState extends State<TodoEditScreen> {
         ..clear()
         ..addAll(todo?.scheduleItems.map((item) => item.id) ?? const []);
       _scheduleItems = scheduleItems
+          .where((item) => item.status == ScheduleStatus.active)
           .map(
             (item) => _ScheduleItemSimple(
               id: item.id,
@@ -115,22 +117,29 @@ class _TodoEditScreenState extends State<TodoEditScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: AppColors.todoBg,
+      resizeToAvoidBottomInset: false,
       body: SafeArea(
-        child: Container(
-          decoration: const BoxDecoration(
-            gradient: LinearGradient(
-              begin: Alignment.topCenter,
-              end: Alignment.bottomCenter,
-              colors: [AppColors.homeBackgroundTop, AppColors.todoBg],
+        child: GestureDetector(
+          behavior: HitTestBehavior.translucent,
+          onTap: () => FocusScope.of(context).unfocus(),
+          child: Container(
+            decoration: const BoxDecoration(
+              gradient: LinearGradient(
+                begin: Alignment.topCenter,
+                end: Alignment.bottomCenter,
+                colors: [AppColors.homeBackgroundTop, AppColors.todoBg],
+              ),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                BackTitlePageHeader(
+                  title: widget.isCreateMode ? '新建待办' : '编辑待办',
+                ),
+                Expanded(child: _buildBody()),
+                _buildBottomAction(),
+              ],
             ),
-          ),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.stretch,
-            children: [
-              BackTitlePageHeader(title: widget.isCreateMode ? '新建待办' : '编辑待办'),
-              Expanded(child: _buildBody()),
-              _buildBottomAction(),
-            ],
           ),
         ),
       ),
@@ -406,11 +415,6 @@ class _TodoEditScreenState extends State<TodoEditScreen> {
       if (!mounted) {
         return;
       }
-      Toast.show(
-        context,
-        widget.isCreateMode ? '待办已创建' : '待办已更新',
-        type: ToastType.success,
-      );
       context.pop(true);
     } catch (error) {
       if (!mounted) {