修复首页设备获取的逻辑

lib/features/home/presentation/pages/home_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:maibu_satabot_v2/core/app/app_user_cubit.dart';
 import 'package:maibu_satabot_v2/features/devices/presentation/bloc/devices_cubit.dart';
+import 'package:maibu_satabot_v2/features/devices/presentation/bloc/devices_state.dart'; // 导入设备状态类
 
 import '../../../devices/domain/entities/device_entity.dart';
 import '../widgets/ImmersionHeader.dart';
@@ -11,59 +12,63 @@ import '../widgets/work_params_card.dart';
 class HomePage extends StatelessWidget {
   const HomePage({super.key});
 
-  @override
-  Widget build(BuildContext context) {
-    // 同时监听用户和设备状态
-    final userState = context.watch<AppUserCubit>().state;
-    final deviceState = context.watch<DevicesCubit>().state;
-    final currentDevice = deviceState.selectedDevice;
-    final defaultDevice = DeviceEntity(deviceName: '暂未绑定设备',
-        productId: 00000,
-        productName: '', tenantId: 00000, tenantName: ''); // 创建默认实例 在没有绑定设备时，使用默认设备
-    // 如果没有绑定设备，展示未绑定设备的提示页面
-    if (currentDevice == null) {
-      return Scaffold(
-        backgroundColor: const Color(0xFFF7F7F7),
-        body: CustomScrollView(
-          physics: const BouncingScrollPhysics(),
-          slivers: [
+  /// 校验选中设备是否有效，无效则返回列表第一个设备
+  DeviceEntity? _getValidCurrentDevice({required List<DeviceEntity> deviceList, required DeviceEntity? selectedDevice}) {
+    if (deviceList.isEmpty) return null;
 
-          SliverToBoxAdapter(child: ImmersionHeader(device: defaultDevice)),
+    // 用deviceName判断设备唯一性（如果有deviceId建议替换为deviceId）
+    final bool isSelectedDeviceValid = deviceList.any((device) => device.deviceName == selectedDevice?.deviceName);
 
+    debugPrint("选中设备有效性：$isSelectedDeviceValid，选中设备名：${selectedDevice?.deviceName}，设备列表：${deviceList.map((e) => e.deviceName).toList()}");
 
-            // 2. 功能网格（保持原有逻辑）
-            const SliverToBoxAdapter(child: QuickActionsGrid()),
-
-            // 3. 作业参数卡片（显示未绑定设备提示）
-            const SliverToBoxAdapter(child: WorkParamsCard()),
-
-            // 4. 地图区域占位
-            const SliverToBoxAdapter(child: SizedBox(height: 120)),
-          ],
-        ),
-      );
-    }
-
-    // 如果有绑定设备，正常展示页面
-    return Scaffold(
-      backgroundColor: const Color(0xFFF7F7F7),
-      body: CustomScrollView(
-        physics: const BouncingScrollPhysics(),
-        slivers: [
-          // 1. 沉浸式顶部展示区
-          SliverToBoxAdapter(child: ImmersionHeader(device: currentDevice)),
-
-          // 2. 功能网格
-          const SliverToBoxAdapter(child: QuickActionsGrid()),
-
-          // 3. 作业参数卡片
-          SliverToBoxAdapter(child: WorkParamsCard()),
-
-          // 4. 地图区域占位
-          const SliverToBoxAdapter(child: SizedBox(height: 120)),
-        ],
-      ),
-    );
+    return isSelectedDeviceValid ? selectedDevice : deviceList.first;
   }
 
+  @override
+  Widget build(BuildContext context) {
+    // 获取用户状态（确保用户已登录）
+    final userState = context.watch<AppUserCubit>().state;
+    final String? username = userState.user?.username;
+
+    // 页面首次渲染完成后，触发设备列表请求（避免同步调用导致的生命周期问题）
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (username != null && username.isNotEmpty) {
+        final devicesCubit = context.read<DevicesCubit>();
+        // 仅在设备列表为空或首次进入时请求（避免重复请求）
+        devicesCubit.fetchAllDevices(username);
+      }
+    });
+
+    // 构建默认设备（无绑定设备时展示）
+    final DeviceEntity defaultDevice = DeviceEntity(deviceName: '暂未绑定设备', productId: 00000, productName: '', tenantId: 00000, tenantName: '');
+
+    return BlocBuilder<DevicesCubit, DevicesState>(
+      builder: (context, deviceState) {
+        // 3. 正常状态：处理设备数据并渲染页面
+        final List<DeviceEntity> deviceList = deviceState.devices ?? [];
+        final DeviceEntity? selectedDevice = deviceState.selectedDevice;
+        final DeviceEntity? currentDevice = _getValidCurrentDevice(deviceList: deviceList, selectedDevice: selectedDevice);
+
+        return Scaffold(
+          backgroundColor: const Color(0xFFF7F7F7),
+          body: CustomScrollView(
+            physics: const BouncingScrollPhysics(),
+            slivers: [
+              // 1. 沉浸式头部（优先展示有效设备，无则展示默认设备）
+              SliverToBoxAdapter(child: ImmersionHeader(device: currentDevice ?? defaultDevice)),
+
+              // 2. 功能网格
+              const SliverToBoxAdapter(child: QuickActionsGrid()),
+
+              // 3. 作业参数卡片
+              SliverToBoxAdapter(child: WorkParamsCard()),
+
+              // 4. 地图区域占位
+              const SliverToBoxAdapter(child: SizedBox(height: 120)),
+            ],
+          ),
+        );
+      },
+    );
+  }
 }