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/auth/login_screen.dart

@@ -15,7 +15,7 @@ class LoginScreen extends ConsumerStatefulWidget {
 
 class _LoginScreenState extends ConsumerState<LoginScreen> {
   final _formKey = GlobalKey<FormState>();
-  final _hotelCodeCtrl = TextEditingController();
+  final _shopCodeCtrl = TextEditingController();
   final _usernameCtrl = TextEditingController();
   final _passwordCtrl = TextEditingController();
   final _hotelCodeFocus = FocusNode();
@@ -42,7 +42,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
     _loadHistory();
     _hotelCodeFocus.addListener(() {
       if (_hotelCodeFocus.hasFocus && _hotelCodeHistory.isNotEmpty) {
-        _openDropdown(_hotelLayerLink, _hotelCodeHistory, _hotelCodeCtrl,
+        _openDropdown(_hotelLayerLink, _hotelCodeHistory, _shopCodeCtrl,
             isHotel: true);
       } else if (!_hotelCodeFocus.hasFocus) {
         _closeHotel();
@@ -68,7 +68,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
     });
     // If a field is already focused, open its dropdown now that history loaded
     if (_hotelCodeFocus.hasFocus && hotels.isNotEmpty) {
-      _openDropdown(_hotelLayerLink, hotels, _hotelCodeCtrl, isHotel: true);
+      _openDropdown(_hotelLayerLink, hotels, _shopCodeCtrl, isHotel: true);
     }
     if (_usernameFocus.hasFocus && users.isNotEmpty) {
       _openDropdown(_usernameLayerLink, users, _usernameCtrl, isHotel: false);
@@ -174,7 +174,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
   void dispose() {
     _hotelEntry?.remove();
     _usernameEntry?.remove();
-    _hotelCodeCtrl.dispose();
+    _shopCodeCtrl.dispose();
     _usernameCtrl.dispose();
     _passwordCtrl.dispose();
     _hotelCodeFocus.dispose();
@@ -189,17 +189,21 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
       _errorMessage = null;
     });
     try {
+      debugPrint('[Login] calling AuthRepository.login...');
       final user = await AuthRepository.login(
-        hotelCode: _hotelCodeCtrl.text.trim(),
+        shopCode: _shopCodeCtrl.text.trim(),
         username: _usernameCtrl.text.trim(),
         password: _passwordCtrl.text,
       );
+      debugPrint('[Login] API success, username=${user.username}');
       await LoginHistoryStorage.record(
-        _hotelCodeCtrl.text.trim(),
+        _shopCodeCtrl.text.trim(),
         _usernameCtrl.text.trim(),
       );
       await ref.read(authStateProvider.notifier).login(user);
+      debugPrint('[Login] notifier.login done, mounted=$mounted, going to /stock-in');
       if (mounted) context.go('/stock-in');
+      debugPrint('[Login] context.go called');
     } on AuthException catch (e) {
       setState(() => _errorMessage = e.message);
     } catch (e) {
@@ -283,11 +287,11 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                             ),
                             const SizedBox(height: 32),
 
-                            // Hotel code field
+                            // Shop code field
                             CompositedTransformTarget(
                               link: _hotelLayerLink,
                               child: TextFormField(
-                                controller: _hotelCodeCtrl,
+                                controller: _shopCodeCtrl,
                                 focusNode: _hotelCodeFocus,
                                 decoration: InputDecoration(
                                   labelText: '门店编号',