feat(app): 初始化家庭网络监控Flutter应用基本结构

- 添加Flutter项目基础文件与配置，包括.gitignore和analysis_options.yaml
- 配置Android相关文件及Gradle构建脚本支持
- 新增设备状态与网络状态数据模型及相关枚举
- 实现网络检测及网速测试服务
- 创建监控状态管理Provider，实现设备状态管理和自动刷新机制
- 编写主界面HomeScreen，包括设备列表、网速仪表盘及基础交互
- 添加资源文件支持应用图标和启动画面
- 配置项目元数据文件，支持Flutter迁移及版本控制
- 新增项目README，提供入门指引和相关资源链接

home_monitor/lib/models/network_status.dart

@@ -0,0 +1,109 @@
+/// 网络状态模型
+class NetworkStatus {
+  final bool isConnected;       // 是否连接
+  final double downloadSpeed;   // 下载速度 (Mbps)
+  final double uploadSpeed;     // 上传速度 (Mbps)
+  final int latency;            // 延迟 (ms)
+  final String externalIp;      // 外网IP
+  final String localIp;         // 内网IP
+  final DateTime lastCheck;     // 最后检测时间
+
+  const NetworkStatus({
+    this.isConnected = false,
+    this.downloadSpeed = 0,
+    this.uploadSpeed = 0,
+    this.latency = 0,
+    this.externalIp = '',
+    this.localIp = '',
+    required this.lastCheck,
+  });
+
+  /// 默认状态
+  factory NetworkStatus.initial() {
+    return NetworkStatus(lastCheck: DateTime.now());
+  }
+
+  /// 从JSON创建
+  factory NetworkStatus.fromJson(Map<String, dynamic> json) {
+    return NetworkStatus(
+      isConnected: json['isConnected'] as bool? ?? false,
+      downloadSpeed: (json['downloadSpeed'] as num?)?.toDouble() ?? 0,
+      uploadSpeed: (json['uploadSpeed'] as num?)?.toDouble() ?? 0,
+      latency: json['latency'] as int? ?? 0,
+      externalIp: json['externalIp'] as String? ?? '',
+      localIp: json['localIp'] as String? ?? '',
+      lastCheck: DateTime.parse(json['lastCheck'] as String),
+    );
+  }
+
+  /// 转换为JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'isConnected': isConnected,
+      'downloadSpeed': downloadSpeed,
+      'uploadSpeed': uploadSpeed,
+      'latency': latency,
+      'externalIp': externalIp,
+      'localIp': localIp,
+      'lastCheck': lastCheck.toIso8601String(),
+    };
+  }
+
+  /// 复制并更新
+  NetworkStatus copyWith({
+    bool? isConnected,
+    double? downloadSpeed,
+    double? uploadSpeed,
+    int? latency,
+    String? externalIp,
+    String? localIp,
+    DateTime? lastCheck,
+  }) {
+    return NetworkStatus(
+      isConnected: isConnected ?? this.isConnected,
+      downloadSpeed: downloadSpeed ?? this.downloadSpeed,
+      uploadSpeed: uploadSpeed ?? this.uploadSpeed,
+      latency: latency ?? this.latency,
+      externalIp: externalIp ?? this.externalIp,
+      localIp: localIp ?? this.localIp,
+      lastCheck: lastCheck ?? this.lastCheck,
+    );
+  }
+
+  /// 获取网络状态描述
+  String get statusDescription {
+    if (!isConnected) return '网络断开';
+    if (latency > 200) return '网络较慢';
+    if (latency > 100) return '网络一般';
+    return '网络良好';
+  }
+
+  /// 格式化下载速度
+  String get downloadSpeedText {
+    if (downloadSpeed >= 1000) {
+      return '${(downloadSpeed / 1000).toStringAsFixed(2)} Gbps';
+    }
+    return '${downloadSpeed.toStringAsFixed(2)} Mbps';
+  }
+
+  /// 格式化上传速度
+  String get uploadSpeedText {
+    if (uploadSpeed >= 1000) {
+      return '${(uploadSpeed / 1000).toStringAsFixed(2)} Gbps';
+    }
+    return '${uploadSpeed.toStringAsFixed(2)} Mbps';
+  }
+}
+
+/// 网速历史记录
+class SpeedHistory {
+  final DateTime time;
+  final double download;
+  final double upload;
+
+  const SpeedHistory({
+    required this.time,
+    required this.download,
+    required this.upload,
+  });
+}