fix: move update checker to TodayPage's initState for better update management

Author: ahmet-cetinkaya

lib/presentation/app.dart

@@ -7,7 +7,6 @@ import 'package:whph/presentation/features/calendar/pages/today_page.dart';
 import 'package:whph/presentation/features/habits/pages/habits_page.dart';
 import 'package:whph/presentation/features/shared/components/responsive_scaffold_layout.dart';
 import 'package:whph/presentation/features/shared/constants/app_theme.dart';
-import 'package:whph/presentation/features/shared/utils/update_checker.dart';
 import 'package:whph/presentation/features/sync/pages/sync_devices_page.dart';
 
 import 'package:whph/presentation/features/tags/pages/tags_page.dart';
@@ -18,8 +17,6 @@ class App extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    UpdateChecker.checkForUpdates(context);
-
     final topNavItems = [
       NavItem(title: 'Today', icon: Icons.today, route: TodayPage.route),
       NavItem(title: 'Tasks', icon: Icons.check_circle, route: TasksPage.route),

lib/presentation/features/calendar/pages/today_page.dart

@@ -6,6 +6,7 @@ import 'package:whph/presentation/features/habits/pages/habit_details_page.dart'
 import 'package:whph/presentation/features/shared/components/done_overlay.dart';
 import 'package:whph/presentation/features/shared/components/secondary_app_bar.dart';
 import 'package:whph/presentation/features/shared/utils/error_helper.dart';
+import 'package:whph/presentation/features/shared/utils/update_checker.dart';
 import 'package:whph/presentation/features/tags/components/tag_select_dropdown.dart';
 import 'package:whph/presentation/features/tags/components/tag_time_chart.dart';
 import 'package:whph/presentation/features/tasks/components/tasks_list.dart';
@@ -31,6 +32,12 @@ class _TodayPageState extends State<TodayPage> {
 
   List<String>? _selectedTagFilter;
 
+  @override
+  void initState() {
+    super.initState();
+    UpdateChecker.checkForUpdates(context);
+  }
+
   Future<void> _openTaskDetails(BuildContext context, String taskId) async {
     await Navigator.push(
       context,