feat: app 端 ui 设计完成

wei_ai_app/lib/models/device_status.dart

@@ -0,0 +1,33 @@
+enum DeviceMode { idle, pattern, manual }
+
+class DeviceStatus {
+  final bool connected;
+  final double battery;
+  final double temperature;
+  final int signalStrength;
+  final DeviceMode currentMode;
+
+  const DeviceStatus({
+    this.connected = false,
+    this.battery = 100.0,
+    this.temperature = 36.5,
+    this.signalStrength = 0,
+    this.currentMode = DeviceMode.idle,
+  });
+
+  DeviceStatus copyWith({
+    bool? connected,
+    double? battery,
+    double? temperature,
+    int? signalStrength,
+    DeviceMode? currentMode,
+  }) {
+    return DeviceStatus(
+      connected: connected ?? this.connected,
+      battery: battery ?? this.battery,
+      temperature: temperature ?? this.temperature,
+      signalStrength: signalStrength ?? this.signalStrength,
+      currentMode: currentMode ?? this.currentMode,
+    );
+  }
+}