fix: keep Windows UI startup independent of notifications

SovereignAI-Starter/flutter_app/lib/main.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:record/record.dart';
@@ -15,7 +17,6 @@ const _night = Color(0xFF101A18);
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await CompletionNotificationService.instance.initialize();
   final api = ApiRepository(
     baseUrl: const String.fromEnvironment(
       'API_BASE_URL',
@@ -34,6 +35,16 @@ Future<void> main() async {
       ),
     ),
   );
+  unawaited(_initializeNotifications());
+}
+
+Future<void> _initializeNotifications() async {
+  try {
+    await CompletionNotificationService.instance.initialize();
+  } catch (error, stackTrace) {
+    debugPrint('Notification initialization failed: $error');
+    debugPrintStack(stackTrace: stackTrace);
+  }
 }
 
 class SovereignApp extends StatelessWidget {