feat(client): 全模块 API 对接 + 修复登陆跳转 + 菜单 UI 优化

API 对接：
- 入库/出库/库存/财务/往来单位/基础数据全部对接后端 REST API
- 新增 repositories、providers、models 层，统一分层架构
- auth 从 flutter_secure_storage 迁移到 shared_preferences

登陆跳转修复：
- 将 _RouterNotifier 提取为独立 Riverpod provider，appRouterProvider
  使用 ref.read 避免依赖链导致 router 重建后跳回 /login
- redirect 函数新增 initialized 守卫，防止 auth 未恢复时误重定向
- 添加调试日志（Router/Auth/ApiClient）定位 401 触发的 logout 链路

退出菜单 UI：
- 去掉 ListTile，改用 Row + 自定义 padding，文字左对齐
- MouseRegion + AnimatedContainer 实现 hover 高亮（普通项蓝底/退出红底）
- 菜单圆角 6px，elevation 8，分割线高度 1px

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

client/lib/screens/shell/app_shell.dart

@@ -72,7 +72,7 @@ class _AppShellState extends ConsumerState<AppShell> {
                   const Icon(Icons.business,
                       color: Colors.white70, size: 14),
                   const SizedBox(width: 4),
-                  Text(user.hotelNo,
+                  Text(user.shopNo,
                       style: const TextStyle(
                           color: Colors.white70, fontSize: 13)),
                   const SizedBox(width: 20),
@@ -86,6 +86,11 @@ class _AppShellState extends ConsumerState<AppShell> {
                   PopupMenuButton<String>(
                     icon: const Icon(Icons.keyboard_arrow_down,
                         color: Colors.white70),
+                    offset: const Offset(0, 36),
+                    shape: RoundedRectangleBorder(
+                        borderRadius: BorderRadius.circular(6)),
+                    color: Colors.white,
+                    elevation: 8,
                     onSelected: (v) {
                       if (v == 'logout') {
                         ref.read(authStateProvider.notifier).logout();
@@ -93,21 +98,24 @@ class _AppShellState extends ConsumerState<AppShell> {
                       }
                     },
                     itemBuilder: (context) => [
-                      const PopupMenuItem(
-                          value: 'profile',
-                          child: ListTile(
-                            leading: Icon(Icons.manage_accounts, size: 18),
-                            title: Text('个人设置'),
-                            dense: true,
-                          )),
-                      const PopupMenuDivider(),
-                      const PopupMenuItem(
-                          value: 'logout',
-                          child: ListTile(
-                            leading: Icon(Icons.logout, size: 18),
-                            title: Text('退出登录'),
-                            dense: true,
-                          )),
+                      const PopupMenuItem<String>(
+                        value: 'profile',
+                        padding: EdgeInsets.zero,
+                        child: _HoverMenuItem(
+                          icon: Icons.manage_accounts_outlined,
+                          label: '个人设置',
+                        ),
+                      ),
+                      const PopupMenuDivider(height: 1),
+                      const PopupMenuItem<String>(
+                        value: 'logout',
+                        padding: EdgeInsets.zero,
+                        child: _HoverMenuItem(
+                          icon: Icons.logout_outlined,
+                          label: '退出登录',
+                          danger: true,
+                        ),
+                      ),
                     ],
                   ),
                   const SizedBox(width: 8),
@@ -161,7 +169,7 @@ class _AppShellState extends ConsumerState<AppShell> {
                             if (user != null) ...[
                               _StatusItem(
                                   icon: Icons.store,
-                                  text: '门店编号：${user.hotelNo}'),
+                                  text: '门店编号：${user.shopNo}'),
                               const _StatusDivider(),
                               _StatusItem(
                                   icon: Icons.person,
@@ -334,3 +342,61 @@ class _ClockWidgetState extends State<_ClockWidget> {
     return _StatusItem(icon: Icons.access_time, text: '当前时间：$_time');
   }
 }
+
+class _HoverMenuItem extends StatefulWidget {
+  final IconData icon;
+  final String label;
+  final bool danger;
+
+  const _HoverMenuItem({
+    required this.icon,
+    required this.label,
+    this.danger = false,
+  });
+
+  @override
+  State<_HoverMenuItem> createState() => _HoverMenuItemState();
+}
+
+class _HoverMenuItemState extends State<_HoverMenuItem> {
+  bool _hovered = false;
+
+  @override
+  Widget build(BuildContext context) {
+    final color = widget.danger
+        ? const Color(0xFFE53935)
+        : const Color(0xFF333333);
+    final hoverBg = widget.danger
+        ? const Color(0xFFFFF0F0)
+        : const Color(0xFFF0F4FF);
+
+    return MouseRegion(
+      onEnter: (_) => setState(() => _hovered = true),
+      onExit: (_) => setState(() => _hovered = false),
+      cursor: SystemMouseCursors.click,
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 120),
+        width: 152,
+        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
+        decoration: BoxDecoration(
+          color: _hovered ? hoverBg : Colors.transparent,
+          borderRadius: BorderRadius.circular(4),
+        ),
+        child: Row(
+          children: [
+            Icon(widget.icon, size: 16, color: color),
+            const SizedBox(width: 10),
+            Text(
+              widget.label,
+              style: TextStyle(
+                fontSize: 14,
+                color: color,
+                fontWeight: FontWeight.w400,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}