已完成用户APP首期功能开发

交付用户端首期页面、配套接口、后台资源及测试文档。用户APP构建、静态分析和三个管理后台构建通过；完整测试仍有2项失败，后端模型注释检查未通过，详见交付记录。

apps/user_app/lib/domain/models/device_group.dart

@@ -0,0 +1,34 @@
+// 功能：解析本人设备分组及其公开设备标识；版本：1.0.0。
+import 'client_models.dart';
+
+/// 设备分组只表达用户自定义归类，不代表设备在线或可控制。
+class DeviceGroup {
+  const DeviceGroup({
+    required this.identity,
+    required this.name,
+    required this.sortNo,
+    required this.deviceIdentities,
+  });
+
+  final String identity;
+  final String name;
+  final int sortNo;
+  final Set<String> deviceIdentities;
+
+  factory DeviceGroup.fromJson(Map<String, Object?> json) => DeviceGroup(
+    identity: json['identity'] as String? ?? '',
+    name: json['name'] as String? ?? '',
+    sortNo: (json['sort_no'] as num?)?.toInt() ?? 0,
+    deviceIdentities: {
+      for (final value in json['device_identities'] as List? ?? const [])
+        if (value is String && value.isNotEmpty) value,
+    },
+  );
+}
+
+/// 同一次页面刷新读取的设备与分组快照，避免两次渲染状态互相错配。
+class DeviceCatalog {
+  const DeviceCatalog({required this.devices, required this.groups});
+  final List<ClientRecord> devices;
+  final List<DeviceGroup> groups;
+}