feat(client): 移动壳基建——底部 5 tab + 我的 hub + 统一底部 sheet + 移动组件四件套

对齐移动原型体系（m-*.html）的 Stage 0 共享基建，桌面形态零改动：

- 导航：router 新增 branch 9（/me 我的 + /me/license 授权屏）；窄屏 tab 根
  （库存/入库/出库/财务/我的）出底部 MTabBar，二级屏隐藏 tabbar + 顶栏返回箭头
  （PopScope 拦系统返回键防退 app）；窄屏 Drawer/汉堡删除；窄屏顶栏对齐 m-top
  （标题 + 主题/通知铃/头像→我的）
- sheet：showMSheet（grip/标题/86vh/键盘避让）+ showAdaptiveSheet；六个共享
  弹层呈现函数加窄屏 sheet 分支（订单/往来/财务往来/商品编辑抽屉 + 退单/登记收支
  dialog 的 asSheet 形态）
- 徽章：DsBadge/StatusPill/StatusBadge 加图标变体（默认圆点零漂移）+
  status_icon_map 转录原型 BADGE_ICON 28 词
- 组件：MKpiGrid（2×2 可点 KPI）/ MSearchRow（搜索+状态钮+详搜钮）/
  MHubGroup（hub 入口组）/ showThemeSheet（主题外观 sheet）
- 授权：_LicensePanel/_SettingsCard 抽取为公共 LicensePanel/SettingsCard，
  窄屏授权跳转 /me/license
- golden：app_shell_mobile + me 各三主题（390×844@2x）；全量 259 测试绿，
  check_ds_code / check-l1-sync 闸过

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/test/golden/app_shell_golden_test.dart

@@ -78,7 +78,8 @@ GoRouter _router() => GoRouter(
       initialLocation: '/inventory',
       routes: [
         StatefulShellRoute.indexedStack(
-          builder: (ctx, state, shell) => AppShell(navigationShell: shell),
+          builder: (ctx, state, shell) =>
+              AppShell(navigationShell: shell, location: state.matchedLocation),
           branches: [
             _branch('/stock-in'),
             _branch('/stock-out'),

client/test/golden/app_shell_mobile_golden_test.dart

@@ -0,0 +1,126 @@
+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:shared_preferences/shared_preferences.dart';
+import 'package:jiu_client/core/auth/auth_state.dart';
+import 'package:jiu_client/core/theme/themes.dart';
+import 'package:jiu_client/models/shop.dart';
+import 'package:jiu_client/providers/shop_provider.dart';
+import 'package:jiu_client/providers/license_provider.dart';
+import 'package:jiu_client/providers/update_provider.dart';
+import 'package:jiu_client/providers/connectivity_provider.dart';
+import 'package:jiu_client/providers/session_heartbeat.dart';
+import 'package:jiu_client/screens/shell/app_shell.dart';
+import 'package:jiu_client/widgets/app_status_bar.dart';
+
+import '../support/golden_harness.dart';
+
+/// 移动壳 golden × 三主题（390×844 @2x）：窄屏顶栏（标题 + 主题/铃/头像）
+/// + 底部 5 tab（库存/入库/出库/财务/我的，库存激活）——对齐原型移动壳
+/// mobile-shell.js（m-top + m-tabbar）。二级屏返回箭头形态另see me golden。
+/// 更新基准：flutter test --update-goldens test/golden/app_shell_mobile_golden_test.dart
+
+class _FakeAuth extends AuthNotifier {
+  _FakeAuth() {
+    state = const AuthState(
+      user: AuthUser(
+          accessToken: 't',
+          refreshToken: 'r',
+          id: 1,
+          username: 'wang',
+          realName: '王经理',
+          shopNo: 'DSJH-001',
+          shopId: 1,
+          role: 'admin'),
+    );
+  }
+}
+
+class _FakeUpdate extends UpdateNotifier {
+  @override
+  Future<AppUpdateInfo?> build() async => null;
+}
+
+class _FakeLicense extends LicenseNotifier {
+  @override
+  Future<LicenseInfo?> build() async => null;
+}
+
+const _shop = ShopInfo(
+    id: 1,
+    code: 'DSJH-001',
+    name: '鼎晟酒行',
+    address: '浙江省杭州市',
+    phone: '0571-88886666',
+    managerName: '王经理');
+
+List<Override> _overrides() => [
+      authStateProvider.overrideWith((ref) => _FakeAuth()),
+      shopInfoProvider.overrideWith((ref) => _shop),
+      licenseProvider.overrideWith(() => _FakeLicense()),
+      updateProvider.overrideWith(() => _FakeUpdate()),
+      connectivityProvider
+          .overrideWith((ref) => ConnectivityNotifier(skipInit: true)),
+      sessionHeartbeatProvider.overrideWith((ref) => SessionHeartbeat(ref)),
+      appVersionProvider.overrideWith((ref) => 'v1.0.72'),
+      isReadonlyProvider.overrideWithValue(false),
+    ];
+
+StatefulShellBranch _branch(String path) => StatefulShellBranch(routes: [
+      GoRoute(path: path, builder: (_, __) => const SizedBox.expand()),
+    ]);
+
+GoRouter _router() => GoRouter(
+      initialLocation: '/inventory',
+      routes: [
+        StatefulShellRoute.indexedStack(
+          builder: (ctx, state, shell) =>
+              AppShell(navigationShell: shell, location: state.matchedLocation),
+          branches: [
+            _branch('/stock-in'),
+            _branch('/stock-out'),
+            _branch('/inventory'),
+            _branch('/finance'),
+            _branch('/partners'),
+            _branch('/products'),
+            _branch('/devices'),
+            _branch('/settings'),
+            _branch('/about'),
+            _branch('/me'),
+          ],
+        ),
+      ],
+    );
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  SharedPreferences.setMockInitialValues({});
+  AppStatusBar.clock = () => DateTime(2026, 7, 13, 9, 30, 15);
+  AppStatusBar.ticking = false;
+
+  for (final theme in const ['a', 'b', 'c']) {
+    testWidgets('app shell mobile · theme $theme', (tester) async {
+      await ensureGoldenFonts();
+      tester.view.physicalSize = const Size(780, 1688); // 390×844 @2x
+      tester.view.devicePixelRatio = 2.0;
+      addTearDown(tester.view.resetPhysicalSize);
+      addTearDown(tester.view.resetDevicePixelRatio);
+
+      await tester.pumpWidget(ProviderScope(
+        overrides: _overrides(),
+        child: MaterialApp.router(
+          debugShowCheckedModeBanner: false,
+          theme: withGoldenFont(buildTheme(theme)),
+          routerConfig: _router(),
+        ),
+      ));
+      await tester.pumpAndSettle();
+
+      await expectLater(
+        find.byType(MaterialApp),
+        matchesGoldenFile('goldens/app_shell_mobile_$theme.png'),
+      );
+    });
+  }
+}

client/test/golden/me_golden_test.dart

@@ -0,0 +1,51 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/material.dart';
+import 'package:jiu_client/core/auth/auth_state.dart';
+import 'package:jiu_client/models/shop.dart';
+import 'package:jiu_client/providers/shop_provider.dart';
+import 'package:jiu_client/screens/me/me_screen.dart';
+
+import '../support/golden_harness.dart';
+
+/// 「我的」hub golden × 三主题（390×844 @2x）：用户头卡（渐变头像 + 角色徽章）
+/// + 经营管理组 3 项 + 系统组 6 项 + 退出登录——对齐原型 m-me.html。
+/// 更新基准：flutter test --update-goldens test/golden/me_golden_test.dart
+
+class _FakeAuth extends AuthNotifier {
+  _FakeAuth() {
+    state = const AuthState(
+      user: AuthUser(
+          accessToken: 't',
+          refreshToken: 'r',
+          id: 1,
+          username: '13800138000',
+          realName: '王经理',
+          shopNo: 'DSJH-001',
+          shopId: 1,
+          role: 'admin'),
+    );
+  }
+}
+
+const _shop = ShopInfo(
+    id: 1,
+    code: 'DSJH-001',
+    name: '鼎晟酒行',
+    address: '浙江省杭州市',
+    phone: '0571-88886666',
+    managerName: '王经理');
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  goldenAcrossThemes(
+    'me screen',
+    child: () => const MeScreen(),
+    goldenPrefix: 'me',
+    logical: const Size(390, 844),
+    overrides: () => [
+      authStateProvider.overrideWith((ref) => _FakeAuth()),
+      shopInfoProvider.overrideWith((ref) => _shop),
+    ],
+  );
+}

client/test/support/shell_harness.dart

@@ -79,7 +79,8 @@ GoRouter _router(String initialPath, WidgetBuilder screen) => GoRouter(
       initialLocation: initialPath,
       routes: [
         StatefulShellRoute.indexedStack(
-          builder: (ctx, state, shell) => AppShell(navigationShell: shell),
+          builder: (ctx, state, shell) =>
+              AppShell(navigationShell: shell, location: state.matchedLocation),
           branches: [
             for (final p in const [
               '/stock-in',

client/test/user_menu_width_test.dart

@@ -55,7 +55,8 @@ GoRouter _router() => GoRouter(
       initialLocation: '/inventory',
       routes: [
         StatefulShellRoute.indexedStack(
-          builder: (ctx, state, shell) => AppShell(navigationShell: shell),
+          builder: (ctx, state, shell) =>
+              AppShell(navigationShell: shell, location: state.matchedLocation),
           branches: [
             for (final p in const [
               '/stock-in',