feat(client): 网络恢复自动刷新 + 离线嗅探 + 连通性感知登录

网络嗅探与自动恢复：
- ConnectivityNotifier：在线时 30s 检测，离线时切换为 1min 嗅探
- 新增 networkRecoveryCountProvider：网络恢复时自增，各数据 provider
  通过 ref.watch 实现自动重新加载
- inventory/product/stock_in/stock_out/partner provider 均已接入

FutureBuilder 类屏幕：
- finance_screen + batch_tracking_screen 通过 ref.listen 监听恢复事件

修复问题 1：API 超时 10s/30s → 5s/15s，减少无网络时等待
修复问题 2：offline banner 文字由"写操作已禁用"改为实际行为描述

连通性感知：
- app 启动时（_AppBootstrap）立即 forceCheck，路由跳转前状态已就绪
- 登录页：watch connectivityProvider，离线时显示警告 banner
- 登录按钮：离线状态下直接提示，不等待超时

测试：
- login_screen_test + login_flow_test 通过 ConnectivityNotifier(skipInit: true)
  覆盖 provider，避免测试环境中 pending HTTP timer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/test/inventory_repository_test.dart

@@ -49,14 +49,16 @@ void main() {
           'data': [
             {
               'warehouse_id': 1,
-              'warehouse_name': '主仓库',
               'product_id': 1,
-              'product_name': '五粮液',
-              'product_code': 'P001',
-              'product_spec': '500ml',
-              'product_unit': '瓶',
-              'product_brand': '五粮液集团',
-              'min_stock': 10,
+              'warehouse': {'name': '主仓库'},
+              'product': {
+                'name': '五粮液',
+                'code': 'P001',
+                'spec': '500ml',
+                'unit': '瓶',
+                'brand': '五粮液集团',
+                'min_stock': 10,
+              },
               'quantity': 50.0,
             }
           ],
@@ -171,9 +173,9 @@ void main() {
           'data': [
             {
               'warehouse_id': 1,
-              'warehouse_name': '主仓库',
               'product_id': 1,
-              'product_name': '五粮液',
+              'warehouse': {'name': '主仓库'},
+              'product': {'name': '五粮液'},
               'direction': 'in',
               'quantity': 20.0,
               'qty_before': 30.0,

client/test/login_flow_test.dart

@@ -0,0 +1,91 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:go_router/go_router.dart';
+import 'package:jiu_client/core/auth/auth_state.dart';
+import 'package:jiu_client/providers/connectivity_provider.dart';
+import 'package:jiu_client/repositories/auth_repository.dart';
+import 'package:jiu_client/screens/auth/login_screen.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+Widget _buildApp() {
+  final router = GoRouter(
+    initialLocation: '/login',
+    routes: [
+      GoRoute(
+        path: '/login',
+        builder: (_, __) => const LoginScreen(),
+      ),
+      GoRoute(
+        path: '/stock-in',
+        builder: (_, __) => const Scaffold(body: Text('stock-in home')),
+      ),
+    ],
+  );
+
+  return ProviderScope(
+    overrides: [
+      connectivityProvider.overrideWith(
+        (_) => ConnectivityNotifier(skipInit: true),
+      ),
+    ],
+    child: MaterialApp.router(routerConfig: router),
+  );
+}
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+    AuthRepository.loginOverride = null;
+  });
+
+  tearDown(() {
+    AuthRepository.loginOverride = null;
+  });
+
+  testWidgets('login success navigates to stock-in home', (tester) async {
+    tester.view.physicalSize = const Size(1280, 800);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+
+    AuthRepository.loginOverride = ({
+      required String shopCode,
+      required String username,
+      required String password,
+    }) async {
+      expect(shopCode, 'S001');
+      expect(username, 'admin');
+      expect(password, 'password123');
+      return const AuthUser(
+        accessToken: 'access-token',
+        refreshToken: 'refresh-token',
+        username: 'admin',
+        realName: '管理员',
+        shopNo: 'S001',
+        shopId: 1,
+      );
+    };
+
+    await tester.pumpWidget(_buildApp());
+    await tester.pumpAndSettle();
+
+    await tester.enterText(
+      find.widgetWithText(TextFormField, '请输入门店编号'),
+      'S001',
+    );
+    await tester.enterText(
+      find.widgetWithText(TextFormField, '请输入用户名'),
+      'admin',
+    );
+    await tester.enterText(
+      find.widgetWithText(TextFormField, '请输入密码'),
+      'password123',
+    );
+
+    await tester.tap(find.text('登  录'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    expect(find.text('stock-in home'), findsOneWidget);
+  });
+}

client/test/login_screen_test.dart

@@ -2,7 +2,9 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:go_router/go_router.dart';
+import 'package:jiu_client/providers/connectivity_provider.dart';
 import 'package:jiu_client/screens/auth/login_screen.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 /// Wrap the screen in the minimum required providers.
 Widget _buildTestApp() {
@@ -21,11 +23,21 @@ Widget _buildTestApp() {
   );
 
   return ProviderScope(
+    overrides: [
+      // skipInit=true：避免测试环境中发起真实 HTTP 请求导致 pending timer
+      connectivityProvider.overrideWith(
+        (_) => ConnectivityNotifier(skipInit: true),
+      ),
+    ],
     child: MaterialApp.router(routerConfig: router),
   );
 }
 
 void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
   group('LoginScreen UI', () {
     testWidgets('renders all three input fields and login button',
         (tester) async {
@@ -99,5 +111,30 @@ void main() {
       final btn = tester.widget<ElevatedButton>(find.byType(ElevatedButton));
       expect(btn.onPressed, isNotNull);
     });
+
+    testWidgets('selecting history item fills shop code input', (tester) async {
+      SharedPreferences.setMockInitialValues({
+        'login_history_hotels': ['S001', 'H001'],
+      });
+
+      tester.view.physicalSize = const Size(1280, 800);
+      tester.view.devicePixelRatio = 1.0;
+      addTearDown(tester.view.resetPhysicalSize);
+
+      await tester.pumpWidget(_buildTestApp());
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.widgetWithText(TextFormField, '请输入门店编号'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('S001'), findsOneWidget);
+      await tester.tap(find.text('S001').last);
+      await tester.pumpAndSettle();
+
+      final field = tester.widget<TextFormField>(
+        find.byType(TextFormField).first,
+      );
+      expect(field.controller!.text, 'S001');
+    });
   });
 }

client/test/partners_screen_test.dart

@@ -133,7 +133,7 @@ void main() {
       );
       await tester.pump();
 
-      expect(find.textContaining('加载失败'), findsOneWidget);
+      expect(find.text('暂无数据，网络不可用'), findsOneWidget);
       expect(find.text('重试'), findsOneWidget);
     });
 

client/test/products_load_flow_test.dart

@@ -0,0 +1,82 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/models/product.dart';
+import 'package:jiu_client/providers/product_provider.dart';
+import 'package:jiu_client/screens/products/products_screen.dart';
+
+class _DelayedProductNotifier extends ProductListNotifier {
+  final Completer<PageResult<Product>> completer;
+
+  _DelayedProductNotifier(this.completer);
+
+  @override
+  Future<PageResult<Product>> build() => completer.future;
+
+  @override
+  void reload() {}
+
+  @override
+  void setKeyword(String keyword) {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  Future<void> createProduct(Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> updateProduct(int id, Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> deleteProduct(int id) async {}
+}
+
+void main() {
+  testWidgets('products screen auto loads and renders product list',
+      (tester) async {
+    tester.view.physicalSize = const Size(1280, 800);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+
+    final completer = Completer<PageResult<Product>>();
+
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          productListProvider.overrideWith(
+            () => _DelayedProductNotifier(completer),
+          ),
+        ],
+        child: const MaterialApp(
+          home: Scaffold(body: ProductsScreen()),
+        ),
+      ),
+    );
+
+    await tester.pump();
+    expect(find.byType(CircularProgressIndicator), findsOneWidget);
+
+    completer.complete(
+      const PageResult<Product>(
+        data: [
+          Product(id: 1, code: 'P001', name: '五粮液', unit: '瓶'),
+          Product(id: 2, code: 'P002', name: '茅台', unit: '瓶'),
+        ],
+        total: 2,
+        page: 1,
+        pageSize: 20,
+      ),
+    );
+
+    await tester.pumpAndSettle();
+
+    expect(find.text('五粮液'), findsOneWidget);
+    expect(find.text('茅台'), findsOneWidget);
+    expect(find.text('P001'), findsOneWidget);
+    expect(find.text('P002'), findsOneWidget);
+  });
+}

client/test/products_screen_test.dart

@@ -113,7 +113,7 @@ void main() {
     );
     await tester.pump();
 
-    expect(find.textContaining('加载失败'), findsOneWidget);
+    expect(find.text('暂无数据，网络不可用'), findsOneWidget);
     expect(find.text('重试'), findsOneWidget);
   });
 

client/test/readonly_write_forbidden_test.dart

@@ -0,0 +1,68 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jiu_client/core/exceptions.dart';
+import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/models/product.dart';
+import 'package:jiu_client/providers/product_provider.dart';
+import 'package:jiu_client/screens/products/products_screen.dart';
+
+class _ReadonlyProductNotifier extends ProductListNotifier {
+  @override
+  Future<PageResult<Product>> build() async {
+    return const PageResult(data: [], total: 0, page: 1, pageSize: 20);
+  }
+
+  @override
+  void reload() {}
+
+  @override
+  void setKeyword(String keyword) {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  Future<void> createProduct(Map<String, dynamic> data) async {
+    throw const AppException('readonly user', statusCode: 403);
+  }
+
+  @override
+  Future<void> updateProduct(int id, Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> deleteProduct(int id) async {}
+}
+
+void main() {
+  testWidgets('write operation shows forbidden error for readonly user',
+      (tester) async {
+    tester.view.physicalSize = const Size(1280, 800);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          productListProvider.overrideWith(() => _ReadonlyProductNotifier()),
+        ],
+        child: const MaterialApp(
+          home: Scaffold(body: ProductsScreen()),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('新建'));
+    await tester.pumpAndSettle();
+
+    await tester.enterText(find.byType(TextFormField).at(0), '测试商品');
+    await tester.enterText(find.byType(TextFormField).at(1), 'P999');
+
+    await tester.tap(find.text('保存'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    expect(find.textContaining('保存失败：readonly user'), findsOneWidget);
+  });
+}

client/test/stock_in_create_submit_flow_test.dart

@@ -0,0 +1,183 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:go_router/go_router.dart';
+import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/models/partner.dart';
+import 'package:jiu_client/models/product.dart';
+import 'package:jiu_client/models/stock_in.dart';
+import 'package:jiu_client/models/warehouse.dart';
+import 'package:jiu_client/providers/partner_provider.dart';
+import 'package:jiu_client/providers/product_provider.dart';
+import 'package:jiu_client/providers/stock_in_provider.dart';
+import 'package:jiu_client/providers/warehouse_provider.dart';
+import 'package:jiu_client/screens/stock_in/stock_in_form_screen.dart';
+
+class _FakeWarehouseNotifier extends WarehouseListNotifier {
+  @override
+  Future<List<Warehouse>> build() async {
+    return const [
+      Warehouse(id: 1, name: '主仓库', isDefault: true),
+    ];
+  }
+
+  @override
+  Future<void> reload() async {}
+}
+
+class _FakeSupplierNotifier extends PartnerListNotifier {
+  _FakeSupplierNotifier() : super(type: 'supplier');
+
+  @override
+  Future<PageResult<Partner>> build() async {
+    return const PageResult(
+      data: [
+        Partner(id: 1, name: '张家酒水', type: 'supplier'),
+      ],
+      total: 1,
+      page: 1,
+      pageSize: 20,
+    );
+  }
+
+  @override
+  void reload() {}
+}
+
+class _FakeProductNotifier extends ProductListNotifier {
+  @override
+  Future<PageResult<Product>> build() async {
+    return const PageResult(
+      data: [
+        Product(
+          id: 1,
+          code: 'P001',
+          name: '五粮液',
+          spec: '500ml',
+          unit: '瓶',
+          purchasePrice: 100,
+        ),
+      ],
+      total: 1,
+      page: 1,
+      pageSize: 20,
+    );
+  }
+
+  @override
+  void reload() {}
+
+  @override
+  void setKeyword(String keyword) {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  Future<void> createProduct(Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> updateProduct(int id, Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> deleteProduct(int id) async {}
+}
+
+class _CapturingStockInNotifier extends StockInListNotifier {
+  Map<String, dynamic>? capturedData;
+
+  @override
+  Future<PageResult<StockInOrder>> build() async {
+    return const PageResult(data: [], total: 0, page: 1, pageSize: 20);
+  }
+
+  @override
+  void reload() {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  void setStatus(String status) {}
+
+  @override
+  void setDateRange(String? startDate, String? endDate) {}
+
+  @override
+  Future<void> createOrder(Map<String, dynamic> data) async {
+    capturedData = data;
+  }
+
+  @override
+  Future<void> submitOrder(int id) async {}
+
+  @override
+  Future<void> approveOrder(int id) async {}
+
+  @override
+  Future<void> rejectOrder(int id) async {}
+}
+
+void main() {
+  testWidgets('stock-in form creates and submits a pending order',
+      (tester) async {
+    tester.view.physicalSize = const Size(1440, 1200);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+
+    final stockInNotifier = _CapturingStockInNotifier();
+    final router = GoRouter(
+      initialLocation: '/stock-in/new',
+      routes: [
+        GoRoute(
+          path: '/stock-in',
+          builder: (_, __) => const Scaffold(body: Text('stock-in list')),
+        ),
+        GoRoute(
+          path: '/stock-in/new',
+          builder: (_, __) => const StockInFormScreen(),
+        ),
+      ],
+    );
+
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          warehouseListProvider.overrideWith(() => _FakeWarehouseNotifier()),
+          supplierListProvider.overrideWith(() => _FakeSupplierNotifier()),
+          productListProvider.overrideWith(() => _FakeProductNotifier()),
+          stockInListProvider.overrideWith(() => stockInNotifier),
+        ],
+        child: MaterialApp.router(routerConfig: router),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byType(DropdownButtonFormField<int>).at(0));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('主仓库').last);
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byType(DropdownButtonFormField<int>).at(2));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('五粮液（500ml）').last);
+    await tester.pumpAndSettle();
+
+    await tester.enterText(find.byType(TextFormField).at(1), '10');
+    await tester.enterText(find.byType(TextFormField).at(2), '100');
+
+    await tester.tap(find.text('提交审核'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    expect(find.text('stock-in list'), findsOneWidget);
+    expect(stockInNotifier.capturedData, isNotNull);
+    expect(stockInNotifier.capturedData!['warehouse_id'], 1);
+    expect(stockInNotifier.capturedData!['status'], 'pending');
+    expect((stockInNotifier.capturedData!['items'] as List).length, 1);
+    expect(
+      (stockInNotifier.capturedData!['items'] as List).first['product_id'],
+      1,
+    );
+  });
+}

client/test/stock_in_screen_test.dart

@@ -175,7 +175,7 @@ void main() {
       );
       await tester.pump();
 
-      expect(find.textContaining('加载失败'), findsOneWidget);
+      expect(find.text('暂无数据，网络不可用'), findsOneWidget);
       expect(find.text('重试'), findsOneWidget);
     });
 
@@ -226,7 +226,7 @@ void main() {
       await tester.pumpWidget(_buildApp(const AsyncValue.data(empty)));
       await tester.pump();
 
-      expect(find.text('新建入库单'), findsOneWidget);
+      expect(find.text('新建入库审核单'), findsOneWidget);
     });
 
     testWidgets('tapping 新建入库单 navigates to new order route', (tester) async {
@@ -240,7 +240,7 @@ void main() {
       await tester.pumpWidget(_buildApp(const AsyncValue.data(empty)));
       await tester.pump();
 
-      await tester.tap(find.text('新建入库单'));
+      await tester.tap(find.text('新建入库审核单'));
       await tester.pumpAndSettle();
 
       expect(find.text('new order form'), findsOneWidget);
@@ -349,7 +349,9 @@ void main() {
       await tester.pumpWidget(_buildApp(const AsyncValue.data(empty)));
       await tester.pump();
 
-      // The dropdown shows 全部状态 by default
+      await tester.tap(find.text('入库单'));
+      await tester.pumpAndSettle();
+
       expect(find.text('全部状态'), findsOneWidget);
     });
 
@@ -365,7 +367,7 @@ void main() {
       await tester.pumpWidget(_buildApp(AsyncValue.data(result)));
       await tester.pump();
 
-      expect(find.textContaining('35'), findsAtLeastNWidgets(1));
+      expect(find.textContaining('共 1 条记录'), findsOneWidget);
     });
   });
 }

client/test/stock_out_insufficient_stock_flow_test.dart

@@ -0,0 +1,214 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:go_router/go_router.dart';
+import 'package:jiu_client/core/api/api_client.dart';
+import 'package:jiu_client/core/exceptions.dart';
+import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/models/inventory.dart';
+import 'package:jiu_client/models/partner.dart';
+import 'package:jiu_client/models/product.dart';
+import 'package:jiu_client/models/stock_out.dart';
+import 'package:jiu_client/models/warehouse.dart';
+import 'package:jiu_client/providers/inventory_provider.dart';
+import 'package:jiu_client/providers/partner_provider.dart';
+import 'package:jiu_client/providers/product_provider.dart';
+import 'package:jiu_client/providers/stock_out_provider.dart';
+import 'package:jiu_client/providers/warehouse_provider.dart';
+import 'package:jiu_client/repositories/inventory_repository.dart';
+import 'package:jiu_client/screens/stock_out/stock_out_form_screen.dart';
+
+class _FakeWarehouseNotifier extends WarehouseListNotifier {
+  @override
+  Future<List<Warehouse>> build() async {
+    return const [
+      Warehouse(id: 1, name: '主仓库', isDefault: true),
+    ];
+  }
+
+  @override
+  Future<void> reload() async {}
+}
+
+class _FakeCustomerNotifier extends PartnerListNotifier {
+  _FakeCustomerNotifier() : super(type: 'customer');
+
+  @override
+  Future<PageResult<Partner>> build() async {
+    return const PageResult(
+      data: [
+        Partner(id: 2, name: '王记饭店', type: 'customer'),
+      ],
+      total: 1,
+      page: 1,
+      pageSize: 20,
+    );
+  }
+
+  @override
+  void reload() {}
+}
+
+class _FakeProductNotifier extends ProductListNotifier {
+  @override
+  Future<PageResult<Product>> build() async {
+    return const PageResult(
+      data: [
+        Product(
+          id: 1,
+          code: 'P001',
+          name: '五粮液',
+          spec: '500ml',
+          unit: '瓶',
+          salePrice: 120,
+        ),
+      ],
+      total: 1,
+      page: 1,
+      pageSize: 20,
+    );
+  }
+
+  @override
+  void reload() {}
+
+  @override
+  void setKeyword(String keyword) {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  Future<void> createProduct(Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> updateProduct(int id, Map<String, dynamic> data) async {}
+
+  @override
+  Future<void> deleteProduct(int id) async {}
+}
+
+class _FakeInventoryRepository extends InventoryRepository {
+  _FakeInventoryRepository() : super(_DummyApiClient());
+
+  @override
+  Future<PageResult<Inventory>> listInventory({
+    int? warehouseId,
+    String? keyword,
+    int page = 1,
+    int pageSize = 50,
+  }) async {
+    return const PageResult(
+      data: [
+        Inventory(
+          warehouseId: 1,
+          warehouseName: '主仓库',
+          productId: 1,
+          productName: '五粮液',
+          productUnit: '瓶',
+          quantity: 1,
+        ),
+      ],
+      total: 1,
+      page: 1,
+      pageSize: 50,
+    );
+  }
+}
+
+class _DummyApiClient extends ApiClient {
+  _DummyApiClient() : super(token: 'test-token');
+}
+
+class _FailingStockOutNotifier extends StockOutListNotifier {
+  @override
+  Future<PageResult<StockOutOrder>> build() async {
+    return const PageResult(data: [], total: 0, page: 1, pageSize: 20);
+  }
+
+  @override
+  void reload() {}
+
+  @override
+  void setPage(int page) {}
+
+  @override
+  void setStatus(String status) {}
+
+  @override
+  void setDateRange(String? startDate, String? endDate) {}
+
+  @override
+  Future<void> createOrder(Map<String, dynamic> data) async {
+    throw const AppException('库存不足：五粮液 当前库存 1，需要 5', statusCode: 400);
+  }
+
+  @override
+  Future<void> deleteOrder(int id) async {}
+
+  @override
+  Future<void> submitOrder(int id) async {}
+
+  @override
+  Future<void> approveOrder(int id) async {}
+
+  @override
+  Future<void> rejectOrder(int id) async {}
+}
+
+void main() {
+  testWidgets('stock-out form shows insufficient stock error on submit',
+      (tester) async {
+    tester.view.physicalSize = const Size(1440, 1200);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+
+    final router = GoRouter(
+      initialLocation: '/stock-out/new',
+      routes: [
+        GoRoute(
+          path: '/stock-out',
+          builder: (_, __) => const Scaffold(body: Text('stock-out list')),
+        ),
+        GoRoute(
+          path: '/stock-out/new',
+          builder: (_, __) => const StockOutFormScreen(),
+        ),
+      ],
+    );
+
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          warehouseListProvider.overrideWith(() => _FakeWarehouseNotifier()),
+          customerListProvider.overrideWith(() => _FakeCustomerNotifier()),
+          productListProvider.overrideWith(() => _FakeProductNotifier()),
+          stockOutListProvider.overrideWith(() => _FailingStockOutNotifier()),
+          inventoryRepositoryProvider.overrideWith(
+            (ref) => _FakeInventoryRepository(),
+          ),
+        ],
+        child: MaterialApp.router(routerConfig: router),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byType(DropdownButtonFormField<int>).at(0));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('主仓库').last);
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byType(DropdownButtonFormField<int>).at(2));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('五粮液（500ml）').last);
+    await tester.pumpAndSettle();
+
+    await tester.enterText(find.byType(TextFormField).at(1), '5');
+    await tester.tap(find.text('提交审核'));
+    await tester.pump();
+    await tester.pumpAndSettle();
+
+    expect(find.textContaining('库存不足'), findsOneWidget);
+    expect(find.text('stock-out list'), findsNothing);
+  });
+}