jiu/client/lib/screens/shell/app_shell.dart

import '../../core/utils/dialog_util.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:intl/intl.dart';
import 'package:flutter/foundation.dart' show kIsWeb;
import '../../core/auth/auth_state.dart';
import '../../widgets/write_guard.dart';
import '../../core/config/app_config.dart';
import '../../core/config/license_copy.dart';
import '../../core/responsive/responsive.dart';
import '../../core/theme/context_tokens.dart';
import '../../core/theme/app_chrome.g.dart';
import '../../providers/connectivity_provider.dart';
import '../../providers/session_heartbeat.dart';
import '../../providers/shop_provider.dart';
import '../../providers/update_provider.dart';
import '../../core/update/app_updater.dart';
import '../../providers/license_provider.dart';
import '../../widgets/network_retry_button.dart';
import '../../widgets/theme_picker_pill.dart';
import '../../widgets/notification_bell.dart';
import '../../widgets/app_status_bar.dart';

/// 侧栏导航项（含其 StatefulShellRoute 分支序号 = router 中的 branch index）。
class _NavItem {
  final IconData icon;
  final String label;
  final int index;
  const _NavItem(this.icon, this.label, this.index);
}

/// 侧栏分组（原型 nav-label：单据 / 经营 / 系统）。
class _NavGroup {
  final String label;
  final List<_NavItem> items;
  const _NavGroup(this.label, this.items);
}

// 分支序号必须与 router StatefulShellRoute 的 branch 顺序一致（勿改顺序）。
const _navGroups = <_NavGroup>[
  _NavGroup('单据', [
    _NavItem(Icons.file_download_outlined, '入库管理', 0),
    _NavItem(Icons.file_upload_outlined, '出库管理', 1),
  ]),
  _NavGroup('经营', [
    _NavItem(Icons.inventory_2_outlined, '库存管理', 2),
    _NavItem(Icons.receipt_long_outlined, '财务管理', 3),
    _NavItem(Icons.people_alt_outlined, '往来单位', 4),
    _NavItem(Icons.grid_view_outlined, '基础数据', 5),
  ]),
  _NavGroup('系统', [
    _NavItem(Icons.devices_outlined, '设备管理', 6),
    _NavItem(Icons.settings_outlined, '系统设置', 7),
    _NavItem(Icons.info_outline, '关于我们', 8),
  ]),
];

String _roleLabel(String role) {
  switch (role) {
    case 'superadmin':
      return '超级管理员';
    case 'admin':
      return '管理员';
    case 'readonly':
      return '只读';
    default:
      return '操作员';
  }
}

class AppShell extends ConsumerStatefulWidget {
  /// StatefulShellRoute 注入的导航壳：各栏目分支 Navigator 的 IndexedStack，
  /// 跨栏目切换时各分支页面 State 常驻（保住半填表单 / 内部 tab / 滚动位置）。
  final StatefulNavigationShell navigationShell;
  const AppShell({super.key, required this.navigationShell});

  @override
  ConsumerState<AppShell> createState() => _AppShellState();
}

class _AppShellState extends ConsumerState<AppShell> {
  final String _loginTime =
      DateFormat('HH:mm:ss').format(AppStatusBar.clock());
  bool _forceDialogShown = false;
  bool _licenseDialogShown = false;
  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();

  /// 打开账号菜单（个人设置 / 退出登录）。[anchorContext] = 用户区组件的 context，
  /// 据其实测宽度让菜单等宽（不溢出内容区）、据其位置把菜单**完整弹到按钮正上方**
  /// （留 8px 间隙，不遮挡触发器，对齐原型）。
  void _openUserMenu(BuildContext anchorContext) {
    final t = anchorContext.tokens;
    final rb = anchorContext.findRenderObject() as RenderBox?;
    final overlay =
        Overlay.of(anchorContext).context.findRenderObject() as RenderBox?;
    if (rb == null || overlay == null) return;
    final topLeft = rb.localToGlobal(Offset.zero, ancestor: overlay);
    final items = <PopupMenuEntry<String>>[
      _userMenuItem('profile', Icons.manage_accounts_outlined, '个人设置', t),
      _userMenuItem('logout', Icons.logout, '退出登录', t),
    ];
    // 菜单弹到按钮上方：top = 按钮顶 − 菜单估高 − 间隙（菜单项 40 + 上下 padding 8*2）
    const itemH = 40.0;
    final menuH = items.length * itemH + 16;
    final top = topLeft.dy - menuH - 8;
    showMenu<String>(
      context: anchorContext,
      position: RelativeRect.fromLTRB(
        topLeft.dx,
        top,
        overlay.size.width - topLeft.dx - rb.size.width,
        overlay.size.height - top,
      ),
      constraints: BoxConstraints.tightFor(width: rb.size.width),
      color: t.menuUserBg,
      elevation: 8,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(6)),
      items: items,
    ).then((v) {
      if (v == 'logout') _logout();
    });
  }

  /// 切换到第 index 个分支；再次点当前栏目则回到该分支初始页。
  void _goBranch(int index) {
    widget.navigationShell.goBranch(
      index,
      initialLocation: index == widget.navigationShell.currentIndex,
    );
  }

  void _logout() {
    ref.read(authStateProvider.notifier).logout();
    context.go('/login');
  }

  @override
  Widget build(BuildContext context) {
    final user = ref.watch(authStateProvider).user;
    // 登录态心跳：随 shell 挂载存活，~30s 一次，感知被踢下线
    ref.watch(sessionHeartbeatProvider);
    // 全局轻提示（写请求被后端 403 拒绝等）：统一在此弹出并清空。
    ref.listen<String?>(apiMessageProvider, (prev, next) {
      if (next == null || next.isEmpty) return;
      ScaffoldMessenger.of(context)
        ..clearSnackBars()
        ..showSnackBar(SnackBar(content: Text(next)));
      ref.read(apiMessageProvider.notifier).state = null;
    });
    final isOnline = ref.watch(connectivityProvider);
    final isMobile = context.isMobile;
    final topInset = MediaQuery.of(context).padding.top;
    final updateNotifier = ref.watch(updateProvider.notifier);
    final updateInfo = ref.watch(updateProvider).valueOrNull;
    final licenseInfo = ref.watch(licenseProvider).valueOrNull;

    return SelectionArea(
      child: Scaffold(
        key: _scaffoldKey,
        drawer: isMobile ? _buildDrawer(context, user) : null,
        drawerEnableOpenDragGesture: !kIsWeb && isMobile,
        body: Column(
          children: [
            _buildTopBar(context, user, isMobile, topInset),
            Expanded(
              child: Row(
                children: [
                  if (!isMobile) _buildSidebar(context, user),
                  Expanded(
                    child: Column(
                      children: [
                        ..._buildBanners(
                            context, isOnline, updateInfo, updateNotifier, licenseInfo),
                        Expanded(child: widget.navigationShell),
                        if (!isMobile) AppStatusBar(loginTime: _loginTime),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  // ── 顶栏（原型 .top, 56h）：左两级品牌；右 主题器 + 通知铃 ───────────────────
  Widget _buildTopBar(
      BuildContext context, AuthUser? user, bool isMobile, double topInset) {
    final t = context.tokens;
    return Container(
      height: 56 + topInset,
      decoration: BoxDecoration(
        color: t.topBg,
        border: Border(bottom: BorderSide(color: t.topBorder)),
      ),
      padding: EdgeInsets.only(top: topInset, left: isMobile ? 6 : 18, right: 14),
      child: Row(
        children: [
          // 左组（占满剩余空间，靠左）：把右组（主题器+铃）挤到最右
          Expanded(
            child: Row(
              children: [
                if (isMobile) ...[
                  IconButton(
                    icon: Icon(Icons.menu, color: t.topFg),
                    tooltip: '菜单',
                    onPressed: () => _scaffoldKey.currentState?.openDrawer(),
                  ),
                  const SizedBox(width: 2),
                ],
                // 软件品牌（岩美酒库）—— 桌面常显，窄屏让位给门店
                if (!isMobile) ...[
                  const _SoftwareBrand(),
                  Container(
                    width: 1,
                    height: 20,
                    color: t.topBorder,
                    margin: const EdgeInsets.symmetric(horizontal: 8),
                  ),
                ],
                // 门店品牌（御品轩名酒坊）——点开门店信息；过长省略
                Flexible(child: _ShopBrand(user: user)),
                if (WriteGuard.isReadonly(ref)) ...[
                  const SizedBox(width: 10),
                  _readonlyBadge(t.topControl),
                ],
              ],
            ),
          ),
          // 右组：主题器 + 通知铃，紧贴右侧
          const SizedBox(width: 12),
          const ThemePickerPill(),
          const SizedBox(width: 14),
          const NotificationBell(),
        ],
      ),
    );
  }

  Widget _readonlyBadge(Color bg) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
      decoration: BoxDecoration(
        color: bg,
        borderRadius: BorderRadius.circular(4),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: const [
          Icon(Icons.visibility_outlined, size: 13, color: AppChrome.onAccent),
          SizedBox(width: 4),
          Text('只读',
              style: TextStyle(
                  color: AppChrome.onAccent,
                  fontSize: 12,
                  fontWeight: FontWeight.w600)),
        ],
      ),
    );
  }

  // ── 侧栏（原型 .side, 218w）：分组导航 + 底部 side-user ─────────────────────
  Widget _buildSidebar(BuildContext context, AuthUser? user) {
    final t = context.tokens;
    return Container(
      width: 218,
      decoration: BoxDecoration(
        color: t.sideBg,
        border: Border(right: BorderSide(color: t.sideBorder)),
      ),
      padding: const EdgeInsets.fromLTRB(12, 12, 12, 0),
      child: Column(
        children: [
          Expanded(
            child: ListView(
              padding: EdgeInsets.zero,
              children: [
                for (final g in _navGroups) ...[
                  _navLabel(t, g.label),
                  for (final item in g.items)
                    _SidebarNav(
                      item: item,
                      active: widget.navigationShell.currentIndex == item.index,
                      onTap: () => _goBranch(item.index),
                    ),
                ],
              ],
            ),
          ),
          if (user != null) _buildSideUser(context, user),
        ],
      ),
    );
  }

  Widget _navLabel(dynamic t, String label) => Padding(
        padding: const EdgeInsets.fromLTRB(10, 10, 10, 6),
        child: Text(
          label,
          style: TextStyle(
            fontSize: 11,
            color: t.sideMuted,
            fontWeight: FontWeight.w600,
            letterSpacing: 0.6,
          ),
        ),
      );

  Widget _buildSideUser(BuildContext context, AuthUser user) {
    final t = context.tokens;
    final shopName = ref.watch(shopInfoProvider).valueOrNull?.name ?? user.shopNo;
    return Column(
      children: [
        Container(
          height: 1,
          color: t.sideBorder,
          margin: const EdgeInsets.fromLTRB(4, 8, 4, 8),
        ),
        Padding(
          padding: const EdgeInsets.only(bottom: 8),
          child: _SideUserTile(
            user: user,
            shopName: shopName,
            roleLabel: _roleLabel(user.role),
            onTap: _openUserMenu,
          ),
        ),
      ],
    );
  }

  PopupMenuItem<String> _userMenuItem(
      String value, IconData icon, String label, dynamic t) {
    return PopupMenuItem<String>(
      value: value,
      height: 40,
      child: Row(
        children: [
          Icon(icon, size: 16, color: t.menuUserFg),
          const SizedBox(width: 9),
          Text(label, style: TextStyle(fontSize: 13, color: t.menuUserFg)),
        ],
      ),
    );
  }

  /// 窄屏（手机）侧滑抽屉导航：与侧栏同分组结构。
  Widget _buildDrawer(BuildContext context, AuthUser? user) {
    final t = context.tokens;
    return Drawer(
      child: Container(
        color: t.sideBg,
        child: SafeArea(
          child: Column(
            children: [
              if (user != null)
                Container(
                  width: double.infinity,
                  padding: const EdgeInsets.fromLTRB(16, 16, 16, 12),
                  color: t.topBg,
                  child: Row(
                    children: [
                      const _SoftwareBrandMark(size: 30),
                      const SizedBox(width: 8),
                      const Text('岩美酒库',
                          style: TextStyle(
                              color: AppChrome.onAccent,
                              fontSize: 17,
                              fontWeight: FontWeight.w700)),
                    ],
                  ),
                ),
              Expanded(
                child: ListView(
                  padding: const EdgeInsets.symmetric(horizontal: 12),
                  children: [
                    for (final g in _navGroups) ...[
                      _navLabel(t, g.label),
                      for (final item in g.items)
                        _SidebarNav(
                          item: item,
                          active:
                              widget.navigationShell.currentIndex == item.index,
                          onTap: () {
                            Navigator.pop(context);
                            _goBranch(item.index);
                          },
                        ),
                    ],
                  ],
                ),
              ),
              if (user != null) ...[
                Container(
                    height: 1,
                    color: t.sideBorder,
                    margin: const EdgeInsets.symmetric(horizontal: 16)),
                ListTile(
                  leading: Icon(Icons.logout, color: t.sideFg),
                  title: Text('退出登录',
                      style: TextStyle(
                          color: t.sideActiveFg,
                          fontWeight: FontWeight.w500)),
                  onTap: () {
                    Navigator.pop(context);
                    _logout();
                  },
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }

  // ── 顶部横幅（更新 / 强制更新 / 授权 / 离线）：保持原有行为 ───────────────────
  List<Widget> _buildBanners(
    BuildContext context,
    bool isOnline,
    AppUpdateInfo? updateInfo,
    UpdateNotifier updateNotifier,
    LicenseInfo? licenseInfo,
  ) {
    final t = context.tokens;
    return [
      if (updateInfo != null &&
          updateInfo.hasUpdate &&
          !updateInfo.forceUpdate &&
          !updateNotifier.isDismissed)
        Container(
          width: double.infinity,
          color: t.warnBg,
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 6),
          child: Row(
            children: [
              Icon(Icons.system_update, size: 16, color: t.warn),
              const SizedBox(width: 8),
              Expanded(
                child: Text(
                  '发现新版本 v${updateInfo.latestVersion}，建议立即更新以获得最新功能与修复',
                  style: TextStyle(color: t.text, fontSize: 13),
                  overflow: TextOverflow.ellipsis,
                ),
              ),
              TextButton(
                onPressed: () => startInAppUpdate(context, updateInfo),
                style: TextButton.styleFrom(foregroundColor: t.warn),
                child: const Text('立即更新'),
              ),
              TextButton(
                onPressed: updateNotifier.dismiss,
                style: TextButton.styleFrom(foregroundColor: t.muted),
                child: const Text('稍后再说'),
              ),
            ],
          ),
        ),
      if (updateInfo != null && updateInfo.hasUpdate && updateInfo.forceUpdate)
        Builder(builder: (ctx) {
          WidgetsBinding.instance.addPostFrameCallback((_) {
            _showForceUpdateDialog(ctx, updateInfo);
          });
          return const SizedBox.shrink();
        }),
      if (licenseInfo != null && licenseInfo.needsAttention)
        _buildLicenseBanner(licenseInfo),
      if (licenseInfo != null &&
          licenseInfo.needsAttention &&
          !_licenseDialogShown)
        Builder(builder: (ctx) {
          WidgetsBinding.instance.addPostFrameCallback((_) {
            if (!_licenseDialogShown && mounted) {
              _licenseDialogShown = true;
              _showLicenseExpiryDialog(ctx, licenseInfo);
            }
          });
          return const SizedBox.shrink();
        }),
      if (!isOnline)
        Container(
          width: double.infinity,
          color: t.danger,
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 6),
          child: const Row(
            children: [
              Icon(Icons.wifi_off, size: 16, color: AppChrome.onAccent),
              SizedBox(width: 8),
              Expanded(
                child: Text(
                  '网络连接已断开 · 当前显示离线缓存数据，恢复后将自动刷新',
                  style: TextStyle(
                      color: AppChrome.onAccent,
                      fontSize: 13,
                      fontWeight: FontWeight.w500),
                ),
              ),
              NetworkRetryButton(),
            ],
          ),
        ),
    ];
  }

  void _showForceUpdateDialog(BuildContext context, AppUpdateInfo info) {
    if (_forceDialogShown) return;
    _forceDialogShown = true;
    showAppDialog(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => PopScope(
        canPop: false,
        child: AlertDialog(
          title: Row(
            children: [
              Icon(Icons.system_update, color: context.tokens.primary),
              const SizedBox(width: 8),
              const Text('发现新版本'),
            ],
          ),
          content: Text('发现新版本 v${info.latestVersion}，需更新后才能继续使用，'
              '更新以获得最新功能与修复。'),
          actions: [
            ElevatedButton(
              onPressed: () => startInAppUpdate(context, info),
              child: const Text('立即更新'),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildLicenseBanner(LicenseInfo lic) {
    final bg = LicenseCopy.bannerColor(lic.phase);
    final msg = LicenseCopy.banner(lic);
    return Container(
      width: double.infinity,
      color: bg,
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 6),
      child: Row(
        children: [
          const Icon(Icons.warning_amber_rounded, size: 16, color: AppChrome.onAccent),
          const SizedBox(width: 8),
          Expanded(
            child: Text(msg,
                style: const TextStyle(color: AppChrome.onAccent, fontSize: 13),
                overflow: TextOverflow.ellipsis),
          ),
          TextButton(
            onPressed: () => context.go('/settings?tab=license'),
            style: TextButton.styleFrom(foregroundColor: AppChrome.onAccentFaint),
            child: const Text('去激活'),
          ),
        ],
      ),
    );
  }

  void _showLicenseExpiryDialog(BuildContext ctx, LicenseInfo lic) {
    final (title, body) = LicenseCopy.dialog(lic);
    final Color titleColor =
        lic.phase == 'grace' ? ctx.tokens.warn : ctx.tokens.danger;
    showDialog(
      context: ctx,
      barrierDismissible: true,
      builder: (_) => AlertDialog(
        title: Row(children: [
          Icon(Icons.warning_amber_rounded, color: titleColor, size: 20),
          const SizedBox(width: 8),
          Text(title, style: TextStyle(color: titleColor, fontSize: 16)),
        ]),
        content: Text(body, style: const TextStyle(fontSize: 14)),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(_),
            child: const Text('稍后处理'),
          ),
          ElevatedButton(
            style: ElevatedButton.styleFrom(backgroundColor: titleColor),
            onPressed: () {
              Navigator.pop(_);
              ctx.go('/settings?tab=license');
            },
            child: const Text('立即前往', style: TextStyle(color: AppChrome.onAccent)),
          ),
        ],
      ),
    );
  }
}

// ── 软件品牌（岩美酒库）：线描山形 mark + 名 ──────────────────────────────────
class _SoftwareBrand extends StatelessWidget {
  const _SoftwareBrand();
  @override
  Widget build(BuildContext context) {
    final t = context.tokens;
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        const _SoftwareBrandMark(size: 30),
        const SizedBox(width: 7),
        Text('岩美酒库',
            style: TextStyle(
                fontWeight: FontWeight.w700,
                fontSize: 17,
                color: t.topFg,
                letterSpacing: 0.3)),
      ],
    );
  }
}

/// 软件 logo 线描山形（原型 prod-mk SVG）：白色描边山峰 + 横线 + 酒色圆点。
class _SoftwareBrandMark extends StatelessWidget {
  final double size;
  const _SoftwareBrandMark({required this.size});
  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      size: Size(size, size),
      painter: _BrandMarkPainter(context.tokens.topFg),
    );
  }
}

class _BrandMarkPainter extends CustomPainter {
  final Color stroke;
  _BrandMarkPainter(this.stroke);
  @override
  void paint(Canvas canvas, Size size) {
    final s = size.width / 64.0; // 原型 viewBox 64
    canvas.scale(s);
    final p = Paint()
      ..color = stroke
      ..style = PaintingStyle.stroke
      ..strokeWidth = 5
      ..strokeCap = StrokeCap.round
      ..strokeJoin = StrokeJoin.round;
    final peak = Path()
      ..moveTo(14, 33)
      ..lineTo(23, 16)
      ..lineTo(32, 25)
      ..lineTo(41, 16)
      ..lineTo(50, 33);
    canvas.drawPath(peak, p);
    canvas.drawLine(const Offset(15, 41), const Offset(49, 41), p);
    canvas.drawCircle(const Offset(32, 48), 3.4,
        Paint()..color = AppChrome.brandDot);
  }

  @override
  bool shouldRepaint(_BrandMarkPainter old) => old.stroke != stroke;
}

// ── 门店品牌（鼎晟酒行）：字标 mark + 店名，点开门店信息 ───────────────────────
class _ShopBrand extends ConsumerWidget {
  final AuthUser? user;
  const _ShopBrand({this.user});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = context.tokens;
    final shopAsync = ref.watch(shopInfoProvider);
    final shopName = shopAsync.valueOrNull?.name ?? user?.shopNo ?? '';
    final logoUrl = shopAsync.valueOrNull?.logoUrl ?? '';
    final version = ref.watch(appVersionProvider).valueOrNull ?? 'v1.0.0';

    return MouseRegion(
      cursor: SystemMouseCursors.click,
      child: GestureDetector(
        onTap: () {
          if (user != null) _showShopPanel(context, user!, version: version);
        },
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            _ShopMark(
                logoUrl: logoUrl,
                shopName: shopName,
                bg: t.topMarkBg,
                fg: t.topMarkFg),
            const SizedBox(width: 9),
            Flexible(
              child: Text(
                shopName.isEmpty ? '—' : shopName,
                style: TextStyle(
                    color: t.topFg, fontSize: 13, fontWeight: FontWeight.w600),
                overflow: TextOverflow.ellipsis,
              ),
            ),
          ],
        ),
      ),
    );
  }
}

/// 门店字标（原型 .logo .mk, 26×26 圆角）：有 logo 显示图，否则店名首字。
class _ShopMark extends StatelessWidget {
  final String logoUrl;
  final String shopName;
  final Color bg;
  final Color fg;
  const _ShopMark(
      {required this.logoUrl,
      required this.shopName,
      required this.bg,
      required this.fg});

  @override
  Widget build(BuildContext context) {
    final radius = BorderRadius.circular(8);
    if (logoUrl.isNotEmpty) {
      final fullUrl = logoUrl.startsWith('http')
          ? logoUrl
          : '${AppConfig.apiBaseUrl.replaceAll('/api/v1', '')}$logoUrl';
      return ClipRRect(
        borderRadius: radius,
        child: Image.network(
          fullUrl,
          width: 26,
          height: 26,
          fit: BoxFit.cover,
          errorBuilder: (_, __, ___) => _initial(radius),
        ),
      );
    }
    return _initial(radius);
  }

  Widget _initial(BorderRadius radius) {
    final initial = shopName.isNotEmpty ? shopName.characters.first : '店';
    return Container(
      width: 26,
      height: 26,
      decoration: BoxDecoration(color: bg, borderRadius: radius),
      alignment: Alignment.center,
      child: Text(initial,
          style: TextStyle(
              color: fg, fontSize: 13, fontWeight: FontWeight.w800)),
    );
  }
}

// ── 侧栏底部用户区（原型 .side-user）：hover 变色（同 nav 的 side-hover），点开账号菜单 ──
class _SideUserTile extends StatefulWidget {
  final AuthUser user;
  final String shopName;
  final String roleLabel;
  final void Function(BuildContext anchorContext) onTap;
  const _SideUserTile({
    required this.user,
    required this.shopName,
    required this.roleLabel,
    required this.onTap,
  });

  @override
  State<_SideUserTile> createState() => _SideUserTileState();
}

class _SideUserTileState extends State<_SideUserTile> {
  bool _hover = false;

  @override
  Widget build(BuildContext context) {
    final t = context.tokens;
    final u = widget.user;
    final initial = u.realName.isNotEmpty ? u.realName : u.username;
    final pic = initial.isNotEmpty ? initial.characters.first : '用';
    return MouseRegion(
      cursor: SystemMouseCursors.click,
      onEnter: (_) => setState(() => _hover = true),
      onExit: (_) => setState(() => _hover = false),
      child: GestureDetector(
        behavior: HitTestBehavior.opaque,
        onTap: () => widget.onTap(context),
        child: Container(
          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 9),
          decoration: BoxDecoration(
            color: _hover ? t.sideHover : Colors.transparent,
            borderRadius: BorderRadius.circular(6),
          ),
          child: Row(
            children: [
              Container(
                width: 34,
                height: 34,
                decoration: BoxDecoration(
                  color: t.sideActiveBg,
                  shape: BoxShape.circle,
                ),
                alignment: Alignment.center,
                child: Text(pic,
                    style: TextStyle(
                        color: t.sideActiveFg,
                        fontWeight: FontWeight.w700,
                        fontSize: 14)),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Text(
                      u.realName.isNotEmpty ? u.realName : u.username,
                      style: TextStyle(
                          color: t.sideActiveFg,
                          fontSize: 13,
                          fontWeight: FontWeight.w600),
                      overflow: TextOverflow.ellipsis,
                    ),
                    Text(
                      '${widget.shopName} · ${widget.roleLabel}',
                      style: TextStyle(color: t.sideMuted, fontSize: 11),
                      overflow: TextOverflow.ellipsis,
                    ),
                  ],
                ),
              ),
              Icon(Icons.keyboard_arrow_down, size: 14, color: t.sideMuted),
            ],
          ),
        ),
      ),
    );
  }
}

// ── 侧栏导航项（原型 .nav, 40h）───────────────────────────────────────────────
class _SidebarNav extends StatefulWidget {
  final _NavItem item;
  final bool active;
  final VoidCallback onTap;
  const _SidebarNav(
      {required this.item, required this.active, required this.onTap});

  @override
  State<_SidebarNav> createState() => _SidebarNavState();
}

class _SidebarNavState extends State<_SidebarNav> {
  bool _hover = false;

  @override
  Widget build(BuildContext context) {
    final t = context.tokens;
    final active = widget.active;
    final Color bg = active
        ? t.sideActiveBg
        : (_hover ? t.sideHover : Colors.transparent);
    final Color fg = active || _hover ? t.sideActiveFg : t.sideFg;
    return MouseRegion(
      cursor: SystemMouseCursors.click,
      onEnter: (_) => setState(() => _hover = true),
      onExit: (_) => setState(() => _hover = false),
      child: GestureDetector(
        onTap: widget.onTap,
        child: Container(
          height: 40,
          margin: const EdgeInsets.only(bottom: 2),
          padding: const EdgeInsets.symmetric(horizontal: 11),
          decoration: BoxDecoration(
            color: bg,
            borderRadius: BorderRadius.circular(6),
          ),
          child: Row(
            children: [
              Icon(widget.item.icon, size: 19, color: fg),
              const SizedBox(width: 11),
              Text(
                widget.item.label,
                style: TextStyle(
                  color: fg,
                  fontSize: 13,
                  fontWeight: active ? FontWeight.w600 : FontWeight.w500,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

// ── 门店信息弹窗（点门店品牌触发，保留原行为）─────────────────────────────────
void _showShopPanel(BuildContext context, AuthUser u,
    {String version = 'v1.0.0'}) {
  showAppDialog(
    context: context,
    builder: (ctx) => Dialog(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
      child: SizedBox(
        width: ctx.dialogWidth(360),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
              decoration: BoxDecoration(
                color: ctx.tokens.primary,
                borderRadius:
                    const BorderRadius.vertical(top: Radius.circular(10)),
              ),
              child: Row(
                children: [
                  const Icon(Icons.store, color: AppChrome.onAccent, size: 20),
                  const SizedBox(width: 10),
                  const Text('门店信息',
                      style: TextStyle(
                          color: AppChrome.onAccent,
                          fontSize: 16,
                          fontWeight: FontWeight.w600)),
                  const Spacer(),
                  IconButton(
                    onPressed: () => Navigator.pop(ctx),
                    icon: const Icon(Icons.close,
                        color: AppChrome.onAccentFaint, size: 18),
                    padding: EdgeInsets.zero,
                    constraints: const BoxConstraints(),
                  ),
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(20),
              child: Column(
                children: [
                  _InfoRow(icon: Icons.tag, label: '门店编号', value: u.shopNo),
                  const SizedBox(height: 14),
                  _InfoRow(
                      icon: Icons.person, label: '登录账号', value: u.username),
                  const SizedBox(height: 14),
                  _InfoRow(
                      icon: Icons.badge_outlined,
                      label: '姓名',
                      value: u.realName),
                  const SizedBox(height: 14),
                  _InfoRow(
                      icon: Icons.info_outline, label: '系统版本', value: version),
                ],
              ),
            ),
          ],
        ),
      ),
    ),
  );
}

class _InfoRow extends StatelessWidget {
  final IconData icon;
  final String label;
  final String value;
  const _InfoRow(
      {required this.icon, required this.label, required this.value});

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Icon(icon, size: 16, color: context.tokens.muted),
        const SizedBox(width: 10),
        SizedBox(
          width: 72,
          child: Text(label,
              style: TextStyle(fontSize: 13, color: context.tokens.muted)),
        ),
        Expanded(
          child: Text(value,
              style: TextStyle(
                  fontSize: 13,
                  color: context.tokens.text,
                  fontWeight: FontWeight.w500)),
        ),
      ],
    );
  }
}