Remove notification service and update project

- Remove flutter_local_notifications dependency from pubspec.yaml
- Delete notification_service.dart file
- Remove notification service references from app_service.dart and app_binding.dart
- Clean up related code and dependencies

pubspec.lock

@@ -226,43 +226,11 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "6.0.0"
-  flutter_local_notifications:
-    dependency: "direct main"
-    description:
-      path: flutter_local_notifications
-      ref: "br_flutter_local_notifications-v17.2.4_ohos"
-      resolved-ref: b2056b29243e05c4c0774360933929a4836da9a3
-      url: "https://gitcode.com/openharmony-sig/fluttertpc_flutter_local_notifications.git"
-    source: git
-    version: "17.2.4"
-  flutter_local_notifications_linux:
-    dependency: transitive
-    description:
-      name: flutter_local_notifications_linux
-      sha256: c49bd06165cad9beeb79090b18cd1eb0296f4bf4b23b84426e37dd7c027fc3af
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "4.0.1"
-  flutter_local_notifications_platform_interface:
-    dependency: transitive
-    description:
-      name: flutter_local_notifications_platform_interface
-      sha256: "85f8d07fe708c1bdcf45037f2c0109753b26ae077e9d9e899d55971711a4ea66"
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "7.2.0"
   flutter_localizations:
     dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_screenutil:
-    dependency: "direct main"
-    description:
-      path: "packages/flutter_screenutil"
-      relative: true
-    source: path
-    version: "5.9.3"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -286,7 +254,7 @@ packages:
       path: "packages/fluttertoast_ohos"
       relative: true
     source: path
-    version: "9.0.0"
+    version: "1.0.0"
   get:
     dependency: "direct main"
     description:
@@ -775,14 +743,6 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "0.7.6"
-  timezone:
-    dependency: transitive
-    description:
-      name: timezone
-      sha256: "2236ec079a174ce07434e89fcd3fcda430025eb7692244139a9cf54fdcf1fc7d"
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.9.4"
   typed_data:
     dependency: transitive
     description: