Fix release notification resource and add multiple advance reminders

mobile/test/widgets/conflict_metadata_test.dart

@@ -41,7 +41,7 @@ void main() {
                   events: events,
                   monday: term.firstMonday,
                   today: term.startDate,
-                  settings: const AppSettings(),
+                  settings: AppSettings(),
                 ),
               ),
             ),
@@ -108,7 +108,7 @@ void main() {
                 events: events,
                 monday: term.firstMonday,
                 today: term.startDate,
-                settings: const AppSettings(),
+                settings: AppSettings(),
               ),
             ),
           ),

mobile/test/widgets/settings_test.dart

@@ -19,6 +19,43 @@ import 'package:hepan_everyday/domain/semester.dart';
 
 void main() {
   setUpAll(tzdata.initializeTimeZones);
+  testWidgets(
+    'reminder times can be selected together and last choice stays selected',
+    (tester) async {
+      final controller = uiController();
+      await controller.initialize();
+      await tester.pumpWidget(
+        MaterialApp(home: SettingsPage(controller: controller)),
+      );
+      await tester.pumpAndSettle();
+      await tester.scrollUntilVisible(
+        find.text('5 分钟'),
+        250,
+        scrollable: find.byType(Scrollable).first,
+      );
+      await tester.ensureVisible(find.text('5 分钟'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('5 分钟'));
+      await tester.pumpAndSettle();
+      expect(
+        (controller.snapshot.toJson()['settings'] as Map)['reminderOffsets'],
+        [5, 15],
+      );
+      await tester.tap(find.text('15 分钟'));
+      await tester.pumpAndSettle();
+      expect(
+        (controller.snapshot.toJson()['settings'] as Map)['reminderOffsets'],
+        [5],
+      );
+      await tester.tap(find.text('5 分钟'));
+      await tester.pumpAndSettle();
+      expect(
+        (controller.snapshot.toJson()['settings'] as Map)['reminderOffsets'],
+        [5],
+      );
+      controller.dispose();
+    },
+  );
   testWidgets(
     'partial initial calendar sync exposes working cleanup action while switch is off',
     (tester) async {

mobile/test/widgets/timetable_test.dart

@@ -35,7 +35,7 @@ void main() {
               events: events,
               monday: term.firstMonday,
               today: term.startDate,
-              settings: const AppSettings(),
+              settings: AppSettings(),
             ),
           ),
         ),