feat(settings): 添加通知偏好设置和后端 API 集成

apps/lib/features/settings/data/models/profile_settings.dart

@@ -37,6 +37,26 @@ class PreferenceSettings {
   }
 }
 
+class NotificationSettings {
+  const NotificationSettings({
+    this.allowNotifications = true,
+    this.allowVibration = true,
+  });
+
+  final bool allowNotifications;
+  final bool allowVibration;
+
+  NotificationSettings copyWith({
+    bool? allowNotifications,
+    bool? allowVibration,
+  }) {
+    return NotificationSettings(
+      allowNotifications: allowNotifications ?? this.allowNotifications,
+      allowVibration: allowVibration ?? this.allowVibration,
+    );
+  }
+}
+
 class ProfileSettingsV1 {
   const ProfileSettingsV1({
     this.version = 1,
@@ -46,7 +66,7 @@ class ProfileSettingsV1 {
     this.avatarUrl,
     this.preferences = const PreferenceSettings(),
     this.privacy = const <String, Object?>{},
-    this.notification = const <String, Object?>{},
+    this.notification = const NotificationSettings(),
   });
 
   final int version;
@@ -56,7 +76,7 @@ class ProfileSettingsV1 {
   final String? avatarUrl;
   final PreferenceSettings preferences;
   final Map<String, Object?> privacy;
-  final Map<String, Object?> notification;
+  final NotificationSettings notification;
 
   ProfileSettingsV1 copyWith({
     int? version,
@@ -66,7 +86,7 @@ class ProfileSettingsV1 {
     String? avatarUrl,
     PreferenceSettings? preferences,
     Map<String, Object?>? privacy,
-    Map<String, Object?>? notification,
+    NotificationSettings? notification,
   }) {
     return ProfileSettingsV1(
       version: version ?? this.version,