feat: app 端 ui 设计完成

wei_ai_app/lib/providers/device_provider.dart

@@ -0,0 +1,33 @@
+import 'dart:async';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../models/device_status.dart';
+
+class DeviceNotifier extends Notifier<DeviceStatus> {
+  Timer? _timer;
+
+  @override
+  DeviceStatus build() {
+    _startSimulation();
+    ref.onDispose(() {
+      _timer?.cancel();
+    });
+    return const DeviceStatus(connected: true, battery: 82.0);
+  }
+
+  void _startSimulation() {
+    _timer = Timer.periodic(const Duration(seconds: 5), (timer) {
+      if (state.battery > 0) {
+        state = state.copyWith(
+          battery: state.connected ? state.battery - 0.05 : state.battery,
+          signalStrength: state.connected ? (85 + (timer.tick % 10)).toInt() : 0,
+        );
+      }
+    });
+  }
+
+  void toggleConnection() {
+    state = state.copyWith(connected: !state.connected);
+  }
+}
+
+final deviceProvider = NotifierProvider<DeviceNotifier, DeviceStatus>(DeviceNotifier.new);