diff --git a/client/test/stock_in_form_pick_test.dart b/client/test/stock_in_form_pick_test.dart
index 56d9f63..6c22242 100644
--- a/client/test/stock_in_form_pick_test.dart
+++ b/client/test/stock_in_form_pick_test.dart
@@ -2,13 +2,18 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:jiu_client/core/api/api_client.dart';
 import 'package:jiu_client/core/auth/auth_state.dart';
 import 'package:jiu_client/core/theme/themes.dart';
 import 'package:jiu_client/models/product_option.dart';
+import 'package:jiu_client/models/stock_in.dart';
 import 'package:jiu_client/models/warehouse.dart';
+import 'package:jiu_client/providers/stock_in_provider.dart';
 import 'package:jiu_client/providers/warehouse_provider.dart';
 import 'package:jiu_client/providers/product_option_provider.dart';
+import 'package:jiu_client/repositories/stock_in_repository.dart';
 import 'package:jiu_client/screens/stock_in/stock_in_form_screen.dart';
+import 'package:jiu_client/widgets/ds/grid_combo_cell.dart';
 
 class _FakeWarehouses extends WarehouseListNotifier {
   @override
@@ -16,6 +21,23 @@ class _FakeWarehouses extends WarehouseListNotifier {
       const [Warehouse(id: 1, name: '主仓', isDefault: true)];
 }
 
+/// 可配置仓库列表的假 notifier（T5 默认仓填充回归用）。
+class _ConfigurableWarehouses extends WarehouseListNotifier {
+  final List<Warehouse> _list;
+  _ConfigurableWarehouses(this._list);
+  @override
+  Future<List<Warehouse>> build() async => _list;
+}
+
+/// 编辑模式假仓库：get() 返回固定单据（供 _loadEditOrder 消费）。
+class _FakeStockInRepoForEdit extends StockInRepository {
+  final StockInOrder order;
+  _FakeStockInRepoForEdit(this.order) : super(ApiClient(token: 't'));
+
+  @override
+  Future<StockInOrder> get(int id) async => order;
+}
+
 class _FakeNames extends ProductNameListNotifier {
   @override
   Future<List<ProductNameOption>> build() async => const [
@@ -85,4 +107,102 @@ void main() {
     expect(find.text('选择商品名称'), findsNothing,
         reason: 'hint should be replaced by the picked name');
   });
+
+  // ── T5：新建入库单默认填充默认仓库（2026-07-14）──────────────────────
+  //
+  // _initWarehouseDefault 语义：仓库列表加载完成后，
+  //   isDefault 的仓 优先；无默认时仅剩 1 个仓才取它；否则保持未选（null）。
+  //   编辑模式不受影响（_loadEditOrder 已从单据自身仓库回填）。
+
+  int? _warehouseSelectedId(WidgetTester tester) => tester
+      .widgetList<GridComboCell>(find.byType(GridComboCell))
+      .firstWhere((c) => c.hint == '选择仓库…')
+      .selectedId;
+
+  Future<void> _pumpForm(WidgetTester tester, List<Override> overrides,
+      {int? editOrderId}) async {
+    tester.view.physicalSize = const Size(1400, 1000);
+    tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.resetPhysicalSize);
+    await tester.pumpWidget(ProviderScope(
+      overrides: overrides,
+      child: MaterialApp(
+        theme: buildTheme('a'),
+        home: Scaffold(body: StockInFormScreen(editOrderId: editOrderId)),
+      ),
+    ));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 100));
+    // _initWarehouseDefault / _loadEditOrder 都是异步（await provider.future），
+    // 多 pump 几拍确保 setState 落地。
+    await tester.pump(const Duration(milliseconds: 100));
+  }
+
+  testWidgets('新建入库单：有默认仓（isDefault=true）时自动选中默认仓',
+      (tester) async {
+    await _pumpForm(tester, [
+      warehouseListProvider.overrideWith(() => _FakeWarehouses()), // 主仓 isDefault
+      productNameListProvider.overrideWith(() => _FakeNames()),
+      productSeriesListProvider.overrideWith(() => _FakeSeries()),
+      productSpecListProvider.overrideWith(() => _FakeSpecs()),
+      isReadonlyProvider.overrideWithValue(false),
+    ]);
+    expect(_warehouseSelectedId(tester), 1);
+  });
+
+  testWidgets('新建入库单：无默认仓且多仓时保持未选', (tester) async {
+    await _pumpForm(tester, [
+      warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
+            Warehouse(id: 1, name: '主仓', isDefault: false),
+            Warehouse(id: 2, name: '分仓', isDefault: false),
+          ])),
+      productNameListProvider.overrideWith(() => _FakeNames()),
+      productSeriesListProvider.overrideWith(() => _FakeSeries()),
+      productSpecListProvider.overrideWith(() => _FakeSpecs()),
+      isReadonlyProvider.overrideWithValue(false),
+    ]);
+    expect(_warehouseSelectedId(tester), isNull);
+  });
+
+  testWidgets('新建入库单：无默认仓但仅有 1 个仓时自动选中该仓', (tester) async {
+    await _pumpForm(tester, [
+      warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
+            Warehouse(id: 7, name: '唯一仓', isDefault: false),
+          ])),
+      productNameListProvider.overrideWith(() => _FakeNames()),
+      productSeriesListProvider.overrideWith(() => _FakeSeries()),
+      productSpecListProvider.overrideWith(() => _FakeSpecs()),
+      isReadonlyProvider.overrideWithValue(false),
+    ]);
+    expect(_warehouseSelectedId(tester), 7);
+  });
+
+  testWidgets('编辑模式：不被默认仓覆盖，仍显示单据原仓库', (tester) async {
+    const order = StockInOrder(
+      id: 99,
+      orderNo: 'SI2024010099',
+      warehouseId: 2, // 单据原仓库 = 分仓（非默认仓）
+      status: 'draft',
+      items: [],
+    );
+    await _pumpForm(
+      tester,
+      [
+        // 主仓（id=1）isDefault=true，若默认仓填充逻辑误在编辑模式生效会把它选中，
+        // 但单据自身仓库是 id=2，回归断言二者不一致时以单据为准。
+        warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
+              Warehouse(id: 1, name: '主仓', isDefault: true),
+              Warehouse(id: 2, name: '分仓', isDefault: false),
+            ])),
+        stockInRepositoryProvider
+            .overrideWithValue(_FakeStockInRepoForEdit(order)),
+        productNameListProvider.overrideWith(() => _FakeNames()),
+        productSeriesListProvider.overrideWith(() => _FakeSeries()),
+        productSpecListProvider.overrideWith(() => _FakeSpecs()),
+        isReadonlyProvider.overrideWithValue(false),
+      ],
+      editOrderId: 99,
+    );
+    expect(_warehouseSelectedId(tester), 2);
+  });
 }
diff --git a/client/test/stock_in_status_filter_test.dart b/client/test/stock_in_status_filter_test.dart
new file mode 100644
index 0000000..f71a213
--- /dev/null
+++ b/client/test/stock_in_status_filter_test.dart
@@ -0,0 +1,279 @@
+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/models/page_result.dart';
+import 'package:jiu_client/core/theme/themes.dart';
+import 'package:jiu_client/models/stock_in.dart';
+import 'package:jiu_client/providers/license_provider.dart';
+import 'package:jiu_client/providers/stock_in_provider.dart';
+import 'package:jiu_client/repositories/stock_in_repository.dart';
+import 'package:jiu_client/screens/stock_in/stock_in_list_screen.dart';
+import 'package:jiu_client/widgets/ds/ds_atoms.dart';
+
+/// 出入库状态多选语义回归（T4）——深测入库屏，出库屏走冒烟（见
+/// stock_out_status_filter_smoke_test.dart），两屏 initState 归一逻辑同构。
+///
+/// 背景：状态筛选 2026-07-14 改多选 + 默认「草稿+待审核」，initState 里逗号拆分
+/// 逐值校验归一的逻辑历史上出过回归（默认值刚设就被误清）。这里只测逻辑（provider
+/// 状态归一 / 多选交互结果），不碰像素。
+
+/// 授权检查覆写：同步返回正常授权，避免 WriteGuard 命中真实网络请求。
+class _FakeLicenseNotifier extends LicenseNotifier {
+  @override
+  Future<LicenseInfo?> build() async => const LicenseInfo(
+        id: 1,
+        type: 'annual',
+        isActive: true,
+        maxDevices: 3,
+        phase: 'normal',
+      );
+}
+
+/// 记录 provider 收到的 setStatus/setDetail 调用参数的假 notifier；
+/// build() 直接返回空列表数据、其余交互 setter 全部 no-op 避免命中真实网络。
+/// [initialStatus] 模拟「进屏前 provider 里已生效的状态筛选」，
+/// 用于驱动 initState 归一分支（关键词/详细搜索本组测试不涉及，固定空）。
+class _RecordingStockInNotifier extends StockInListNotifier {
+  final String initialStatus;
+
+  String? lastSetStatus;
+  Map<String, String>? lastSetDetail;
+
+  _RecordingStockInNotifier({this.initialStatus = 'draft,pending'});
+
+  @override
+  Future<PageResult<StockInOrder>> build() async {
+    state = const AsyncValue.data(
+        PageResult<StockInOrder>(data: [], total: 0, page: 1, pageSize: 20));
+    return state.value!;
+  }
+
+  @override
+  String get currentStatus => initialStatus;
+  @override
+  String get currentKeyword => '';
+  @override
+  Map<String, String> get currentDetail => const {};
+
+  @override
+  void reload() {}
+  @override
+  void setPage(int page) {}
+  @override
+  void setPageSize(int pageSize) {}
+  @override
+  void setKeyword(String keyword) {}
+  @override
+  void setDateRange(String? startDate, String? endDate) {}
+
+  @override
+  void setStatus(String status) {
+    lastSetStatus = status;
+  }
+
+  @override
+  void setDetail(Map<String, String> detail) {
+    lastSetDetail = detail;
+  }
+}
+
+Widget _appWith(_RecordingStockInNotifier notifier) {
+  final router = GoRouter(
+    initialLocation: '/stock-in',
+    routes: [
+      GoRoute(
+        path: '/stock-in',
+        builder: (_, __) => const Scaffold(body: StockInListScreen()),
+      ),
+      GoRoute(
+        path: '/stock-in/new',
+        builder: (_, __) => const Scaffold(body: Text('new order form')),
+      ),
+    ],
+  );
+  return ProviderScope(
+    overrides: [
+      licenseProvider.overrideWith(() => _FakeLicenseNotifier()),
+      stockInListProvider.overrideWith(() => notifier),
+    ],
+    child: MaterialApp.router(theme: buildTheme('a'), routerConfig: router),
+  );
+}
+
+void _bigView(WidgetTester tester) {
+  tester.view.physicalSize = const Size(1400, 1000);
+  tester.view.devicePixelRatio = 1.0;
+  addTearDown(tester.view.resetPhysicalSize);
+}
+
+/// 工具栏「状态」DsChip（多选摘要 chip，唯一 label='状态'）。
+DsChip _statusChip(WidgetTester tester) => tester
+    .widgetList<DsChip>(find.byType(DsChip))
+    .firstWhere((c) => c.label == '状态');
+
+/// 统计 list() 调用参数的假仓库，用于 provider 单测（不经过屏幕）。
+class _CountingStockInRepo extends StockInRepository {
+  String? lastStatus;
+  _CountingStockInRepo() : super(ApiClient(token: 't'));
+
+  @override
+  Future<PageResult<StockInOrder>> list({
+    String? status,
+    String? startDate,
+    String? endDate,
+    String? keyword,
+    Map<String, String>? detail,
+    int page = 1,
+    int pageSize = 20,
+  }) async {
+    lastStatus = status;
+    return const PageResult<StockInOrder>(
+        data: [], total: 0, page: 1, pageSize: 20);
+  }
+}
+
+void main() {
+  group('1. StockInListNotifier 默认状态', () {
+    test('未做任何设置时 currentStatus == draft,pending，且首次拉取即带上该值', () async {
+      final repo = _CountingStockInRepo();
+      final container = ProviderContainer(
+        overrides: [stockInRepositoryProvider.overrideWithValue(repo)],
+      );
+      addTearDown(container.dispose);
+
+      await container.read(stockInListProvider.future);
+      expect(
+          container.read(stockInListProvider.notifier).currentStatus,
+          'draft,pending');
+      expect(repo.lastStatus, 'draft,pending');
+    });
+  });
+
+  group('2. initState 归一逻辑', () {
+    testWidgets('合法多值 pending,draft（顺序不同）原样保留为 2 项，不回写 provider',
+        (tester) async {
+      _bigView(tester);
+      final notifier =
+          _RecordingStockInNotifier(initialStatus: 'pending,draft');
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      expect(_statusChip(tester).value, '2 项');
+      expect(notifier.lastSetStatus, isNull,
+          reason: '合法值不应触发归一回写');
+    });
+
+    testWidgets("'' 保留为「全部」（不视为非法、不被重置为默认）", (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(initialStatus: '');
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      expect(_statusChip(tester).value, isNull, reason: '空值=全部，chip 不应显示选中值');
+      expect(notifier.lastSetStatus, isNull);
+    });
+
+    testWidgets('全部非法（如 foo）→ 归默认 draft,pending 并回写 provider', (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(initialStatus: 'foo');
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      expect(_statusChip(tester).value, '2 项');
+      expect(notifier.lastSetStatus, 'draft,pending');
+    });
+
+    testWidgets('部分非法（如 foo,draft）→ 按实现语义只保留合法子集，不回写 provider',
+        (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(initialStatus: 'foo,draft');
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      // 实现里 valid 非空即直接采用该合法子集，不触发 setStatus 纠正——
+      // 这里按真实代码语义断言，避免测试臆造「归默认」预期。
+      expect(_statusChip(tester).value, '草稿');
+      expect(notifier.lastSetStatus, isNull);
+    });
+  });
+
+  group('3. 多选面板全不选', () {
+    testWidgets('依次取消草稿+待审核 → provider 收到空串（=全部）', (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(); // 默认 draft,pending
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+      expect(_statusChip(tester).value, '2 项');
+
+      // 打开状态多选菜单。
+      await tester.tap(find.byWidgetPredicate(
+          (w) => w is DsChip && w.label == '状态'));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      // .last：菜单项与 chip 摘要值可能同文案（如切到单值后 chip 显示该状态名），
+      // 菜单项在覆盖层里后挂载，取 .last 精确定位菜单项而非 chip 本身。
+      await tester.tap(find.text('草稿').last);
+      await tester.pump();
+      expect(notifier.lastSetStatus, 'pending');
+
+      await tester.tap(find.text('待审核').last);
+      await tester.pump();
+      expect(notifier.lastSetStatus, '');
+    });
+  });
+
+  group('4. KPI 点击覆盖为单值', () {
+    testWidgets('先多选（默认草稿+待审核）再点「待审核」KPI → 变单值 pending',
+        (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(); // 默认多选 draft,pending
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+      expect(_statusChip(tester).value, '2 项', reason: '起点须为多选态');
+
+      await tester.tap(find.text('待审核单数 · 点击筛选'));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      expect(notifier.lastSetStatus, 'pending');
+      expect(_statusChip(tester).value, '待审核');
+    });
+  });
+
+  group('5. 退单互斥（双向）', () {
+    testWidgets('选 ret:partial 清主状态集；再选主状态清 ret:*', (tester) async {
+      _bigView(tester);
+      final notifier = _RecordingStockInNotifier(); // 默认多选 draft,pending
+      await tester.pumpWidget(_appWith(notifier));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      await tester.tap(find.byWidgetPredicate(
+          (w) => w is DsChip && w.label == '状态'));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 50));
+
+      // 5a：选退单态 → 清空主状态集。
+      await tester.tap(find.text('部分退单').last);
+      await tester.pump();
+      expect(notifier.lastSetStatus, '',
+          reason: '选中退单伪状态后主状态应清空（互斥）');
+      expect(notifier.lastSetDetail, {'return_state': 'partial'});
+
+      // 5b：再选主状态 → 清掉 return_state。
+      await tester.tap(find.text('草稿').last);
+      await tester.pump();
+      expect(notifier.lastSetStatus, 'draft');
+      expect(notifier.lastSetDetail, isNot(contains('return_state')));
+    });
+  });
+}
diff --git a/client/test/stock_out_status_filter_smoke_test.dart b/client/test/stock_out_status_filter_smoke_test.dart
new file mode 100644
index 0000000..3087ebb
--- /dev/null
+++ b/client/test/stock_out_status_filter_smoke_test.dart
@@ -0,0 +1,204 @@
+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/models/page_result.dart';
+import 'package:jiu_client/core/theme/themes.dart';
+import 'package:jiu_client/models/stock_out.dart';
+import 'package:jiu_client/providers/license_provider.dart';
+import 'package:jiu_client/providers/stock_out_provider.dart';
+import 'package:jiu_client/repositories/stock_out_repository.dart';
+import 'package:jiu_client/screens/stock_out/stock_out_list_screen.dart';
+import 'package:jiu_client/widgets/ds/ds_atoms.dart';
+
+/// 出库屏状态多选语义冒烟测试（T4）。深测在入库屏
+/// stock_in_status_filter_test.dart（两屏 initState 归一逻辑同构，
+/// 出库屏只做最小抽样：默认值 + 归一分支 + 一次多选/KPI/退单互斥的组合冒烟）。
+class _FakeLicenseNotifier extends LicenseNotifier {
+  @override
+  Future<LicenseInfo?> build() async => const LicenseInfo(
+        id: 1,
+        type: 'annual',
+        isActive: true,
+        maxDevices: 3,
+        phase: 'normal',
+      );
+}
+
+class _RecordingStockOutNotifier extends StockOutListNotifier {
+  final String initialStatus;
+
+  String? lastSetStatus;
+  Map<String, String>? lastSetDetail;
+
+  _RecordingStockOutNotifier({this.initialStatus = 'draft,pending'});
+
+  @override
+  Future<PageResult<StockOutOrder>> build() async {
+    state = const AsyncValue.data(
+        PageResult<StockOutOrder>(data: [], total: 0, page: 1, pageSize: 20));
+    return state.value!;
+  }
+
+  @override
+  String get currentStatus => initialStatus;
+  @override
+  String get currentKeyword => '';
+  @override
+  Map<String, String> get currentDetail => const {};
+
+  @override
+  void reload() {}
+  @override
+  void setPage(int page) {}
+  @override
+  void setPageSize(int pageSize) {}
+  @override
+  void setKeyword(String keyword) {}
+  @override
+  void setProductCode(String code) {}
+  @override
+  void setDateRange(String? startDate, String? endDate) {}
+
+  @override
+  void setStatus(String status) {
+    lastSetStatus = status;
+  }
+
+  @override
+  void setDetail(Map<String, String> detail) {
+    lastSetDetail = detail;
+  }
+}
+
+class _CountingStockOutRepo extends StockOutRepository {
+  String? lastStatus;
+  _CountingStockOutRepo() : super(ApiClient(token: 't'));
+
+  @override
+  Future<PageResult<StockOutOrder>> list({
+    String? status,
+    String? startDate,
+    String? endDate,
+    String? keyword,
+    String? productCode,
+    Map<String, String>? detail,
+    int page = 1,
+    int pageSize = 20,
+  }) async {
+    lastStatus = status;
+    return const PageResult<StockOutOrder>(
+        data: [], total: 0, page: 1, pageSize: 20);
+  }
+}
+
+Widget _appWith(_RecordingStockOutNotifier notifier) {
+  final router = GoRouter(
+    initialLocation: '/stock-out',
+    routes: [
+      GoRoute(
+        path: '/stock-out',
+        builder: (_, __) => const Scaffold(body: StockOutListScreen()),
+      ),
+    ],
+  );
+  return ProviderScope(
+    overrides: [
+      licenseProvider.overrideWith(() => _FakeLicenseNotifier()),
+      stockOutListProvider.overrideWith(() => notifier),
+    ],
+    child: MaterialApp.router(theme: buildTheme('a'), routerConfig: router),
+  );
+}
+
+void _bigView(WidgetTester tester) {
+  tester.view.physicalSize = const Size(1400, 1000);
+  tester.view.devicePixelRatio = 1.0;
+  addTearDown(tester.view.resetPhysicalSize);
+}
+
+DsChip _statusChip(WidgetTester tester) => tester
+    .widgetList<DsChip>(find.byType(DsChip))
+    .firstWhere((c) => c.label == '状态');
+
+void main() {
+  test('1. StockOutListNotifier 默认状态 == draft,pending', () async {
+    final repo = _CountingStockOutRepo();
+    final container = ProviderContainer(
+      overrides: [stockOutRepositoryProvider.overrideWithValue(repo)],
+    );
+    addTearDown(container.dispose);
+
+    await container.read(stockOutListProvider.future);
+    expect(container.read(stockOutListProvider.notifier).currentStatus,
+        'draft,pending');
+    expect(repo.lastStatus, 'draft,pending');
+  });
+
+  testWidgets('2. initState 归一：全部非法 → 归默认并回写；合法多值原样保留',
+      (tester) async {
+    _bigView(tester);
+    final invalid = _RecordingStockOutNotifier(initialStatus: 'foo');
+    await tester.pumpWidget(_appWith(invalid));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    expect(_statusChip(tester).value, '2 项');
+    expect(invalid.lastSetStatus, 'draft,pending');
+  });
+
+  testWidgets("2b. initState 归一：'' 保留为全部", (tester) async {
+    _bigView(tester);
+    final all = _RecordingStockOutNotifier(initialStatus: '');
+    await tester.pumpWidget(_appWith(all));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    expect(_statusChip(tester).value, isNull);
+    expect(all.lastSetStatus, isNull);
+  });
+
+  testWidgets('3+4+5 组合冒烟：多选全清→KPI 覆盖单值→退单互斥双向', (tester) async {
+    _bigView(tester);
+    final notifier = _RecordingStockOutNotifier(); // 默认 draft,pending
+    await tester.pumpWidget(_appWith(notifier));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    expect(_statusChip(tester).value, '2 项');
+
+    // 3：多选面板全不选 → provider 收到空串。
+    await tester.tap(find.byWidgetPredicate(
+        (w) => w is DsChip && w.label == '状态'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    await tester.tap(find.text('草稿').last);
+    await tester.pump();
+    await tester.tap(find.text('待审核').last);
+    await tester.pump();
+    expect(notifier.lastSetStatus, '');
+    // 关闭菜单，回到干净状态。
+    await tester.tapAt(const Offset(10, 10));
+    await tester.pump();
+
+    // 4：KPI 点击覆盖为单值。
+    await tester.tap(find.text('待审核单数 · 点击筛选'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    expect(notifier.lastSetStatus, 'pending');
+    expect(_statusChip(tester).value, '待审核');
+
+    // 5：退单互斥双向。
+    await tester.tap(find.byWidgetPredicate(
+        (w) => w is DsChip && w.label == '状态'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 50));
+    await tester.tap(find.text('部分退单').last);
+    await tester.pump();
+    expect(notifier.lastSetStatus, '', reason: '选中退单态应清空主状态（互斥）');
+    expect(notifier.lastSetDetail, {'return_state': 'partial'});
+
+    await tester.tap(find.text('草稿').last);
+    await tester.pump();
+    expect(notifier.lastSetStatus, 'draft');
+    expect(notifier.lastSetDetail, isNot(contains('return_state')));
+  });
+}