test(client): 整屏 golden 还原闸 + 可复用 golden 骨架（基建）

test/support/golden_harness.dart：pumpGolden（viewport=physical÷dpr/给足高度/
provider 覆盖）+ goldenAcrossThemes（A/B/C 三主题组）。
test/golden/inventory_list_golden_test.dart：库存列表整屏 × 三主题 golden
（fake AsyncNotifier 喂 canned 数据 + isReadonly 覆盖 + SP mock），入库作回归闸。
保真目检：shoot 原型 + montage 与 goldens 并排（见 design-distill flutter-golden.md）。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TSKEiHsvauyxYUW2itzUXX

client/test/golden/inventory_list_golden_test.dart

@@ -0,0 +1,89 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/core/auth/auth_state.dart';
+import 'package:jiu_client/models/inventory.dart';
+import 'package:jiu_client/models/product_option.dart';
+import 'package:jiu_client/providers/inventory_provider.dart';
+import 'package:jiu_client/providers/product_option_provider.dart';
+import 'package:jiu_client/screens/inventory/inventory_list_screen.dart';
+
+import '../support/golden_harness.dart';
+
+/// design-distill 阶段4：库存列表**整屏** golden × 三主题（回归闸）。
+/// 保真目检：另跑 shoot-prototype 截 screens/inventory.html，再用 montage.mjs
+/// 与 goldens/inventory_list_<theme>.png 并排比对。
+/// 更新基准：flutter test --update-goldens test/golden/inventory_list_golden_test.dart
+
+const _items = [
+  Inventory(
+    id: 1, productId: 1, quantity: 128, productCode: 'MT-FT-500',
+    productName: '茅台 飞天 53°', series: '飞天', spec: '500ml×6', unit: '件',
+    warehouseName: '主仓', unitPrice: 2680, productionDate: '2024-07-11',
+    batchNo: 'PZ240711', supplierName: '贵州茅台经销', minStock: 10,
+    createdAt: '2026-06-14',
+  ),
+  Inventory(
+    id: 2, productId: 2, quantity: 8, productCode: 'JNC-SJ-500',
+    productName: '剑南春 水晶剑', series: '水晶剑', spec: '500ml×6', unit: '件',
+    warehouseName: '主仓', unitPrice: 438, productionDate: '2023-11-15',
+    batchNo: 'PZ231115', supplierName: '绵竹剑南春', minStock: 10,
+    createdAt: '2026-06-12',
+  ),
+  Inventory(
+    id: 3, productId: 3, quantity: 0, productCode: 'FJ-QH20-500',
+    productName: '汾酒 青花 20', series: '青花20', spec: '500ml×6', unit: '件',
+    warehouseName: '主仓', unitPrice: 420, productionDate: '2024-01-12',
+    batchNo: 'PZ240112', supplierName: '山西杏花村', minStock: 10,
+    createdAt: '2026-06-03',
+  ),
+];
+
+class _FakeInvNotifier extends InventoryListNotifier {
+  @override
+  Future<PageResult<Inventory>> build() async =>
+      const PageResult(data: _items, total: 3, page: 1, pageSize: 20);
+  @override
+  void setPage(int page) {}
+  @override
+  void setPageSize(int pageSize) {}
+  @override
+  void setWarehouseId(int? id) {}
+  @override
+  void setKeyword(String keyword) {}
+  @override
+  void setSeries(List<String> series) {}
+  @override
+  void setSpec(List<String> spec) {}
+  @override
+  void reload() {}
+}
+
+class _FakeSeriesNotifier extends ProductSeriesListNotifier {
+  @override
+  Future<List<ProductSeriesOption>> build() async => const [];
+}
+
+class _FakeSpecNotifier extends ProductSpecListNotifier {
+  @override
+  Future<List<ProductSpecOption>> build() async => const [];
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  SharedPreferences.setMockInitialValues({});
+
+  goldenAcrossThemes(
+    'inventory list 整屏',
+    goldenPrefix: 'inventory_list',
+    child: () => const Scaffold(body: InventoryListScreen()),
+    overrides: () => [
+      inventoryListProvider.overrideWith(() => _FakeInvNotifier()),
+      productSeriesListProvider.overrideWith(() => _FakeSeriesNotifier()),
+      productSpecListProvider.overrideWith(() => _FakeSpecNotifier()),
+      isReadonlyProvider.overrideWithValue(false),
+    ],
+    logical: const Size(1280, 900),
+  );
+}