feat(client): 移动端布局适配 + 信息架构整理

- 入库/出库详情页：窄屏商品明细切换为卡片竖排，顶部操作收入溢出菜单
- 基础数据：新增「仓库」tab，使用 DataTableCard + mobileCards 适配窄屏
- 系统设置：移除仓库 tab（已迁入基础数据），新增「授权」tab，数据导入改名「数据管理」
- 关于我们：移除授权信息，补充帮助与文档/扫码防伪/法律信息/系统信息等模块
- AppInfo 新增 phone/wechat/termsUrl/privacyUrl/docsUrl 字段（可选，空则不渲染）

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

client/lib/screens/products/products_screen.dart

@@ -3,7 +3,9 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/responsive/responsive.dart';
 import '../../core/theme/app_theme.dart';
+import '../../models/warehouse.dart';
 import '../../providers/product_option_provider.dart';
+import '../../providers/warehouse_provider.dart';
 import '../../widgets/data_table_card.dart';
 import '../../widgets/mobile_list_card.dart';
 import '../../widgets/page_scaffold.dart';
@@ -41,11 +43,13 @@ class _ProductsScreenState extends ConsumerState<ProductsScreen> {
         Tab(text: '商品名称'),
         Tab(text: '系列'),
         Tab(text: '规格'),
+        Tab(text: '仓库'),
       ],
       tabViews: [
         _buildNameTab(),
         _buildSeriesTab(),
         _buildSpecTab(),
+        _buildWarehousesTab(),
       ],
     );
   }
@@ -451,6 +455,123 @@ class _ProductsScreenState extends ConsumerState<ProductsScreen> {
     }
   }
 
+  // ── 仓库 tab ──────────────────────────────────────────────
+
+  Widget _buildWarehousesTab() {
+    final asyncWarehouses = ref.watch(warehouseListProvider);
+    return asyncWarehouses.when(
+      loading: () => const Center(child: CircularProgressIndicator()),
+      error: (e, _) => _buildError(() => ref.read(warehouseListProvider.notifier).reload()),
+      data: (warehouses) => DataTableCard(
+        totalCount: warehouses.length,
+        page: 1,
+        pageSize: warehouses.length + 1,
+        onPageChanged: (_) {},
+        onPageSizeChanged: (_) {},
+        toolbar: Row(
+          children: [
+            ElevatedButton.icon(
+              onPressed: () => _showWarehouseDialog(),
+              icon: const Icon(Icons.add, size: 16),
+              label: const Text('新建'),
+            ),
+          ],
+        ),
+        mobileCards: warehouses
+            .map((w) => MobileListCard(
+                  title: Text(w.name),
+                  subtitle: w.location?.isNotEmpty == true ? Text(w.location!) : null,
+                  fields: [
+                    if (w.isDefault) const MobileCardField('默认仓库', '是'),
+                  ],
+                  actions: [
+                    TextButton(
+                      onPressed: () => _showWarehouseDialog(warehouse: w),
+                      child: const Text('编辑', style: TextStyle(fontSize: 13)),
+                    ),
+                    TextButton(
+                      onPressed: () => _confirmDeleteWarehouse(w),
+                      child: const Text('删除',
+                          style: TextStyle(fontSize: 13, color: AppTheme.danger)),
+                    ),
+                  ],
+                ))
+            .toList(),
+        columns: const [
+          DataColumn(label: Text('仓库名称')),
+          DataColumn(label: Text('位置')),
+          DataColumn(label: Text('默认仓库')),
+          DataColumn(label: Text('操作')),
+        ],
+        rows: warehouses.isEmpty
+            ? [const DataRow(cells: [
+                DataCell(SizedBox()),
+                DataCell(Text('暂无仓库', style: TextStyle(color: AppTheme.textSecondary))),
+                DataCell(SizedBox()),
+                DataCell(SizedBox()),
+              ])]
+            : warehouses
+                .map((w) => DataRow(cells: [
+                      DataCell(Text(w.name, style: const TextStyle(fontWeight: FontWeight.w500))),
+                      DataCell(Text(w.location ?? '-')),
+                      DataCell(w.isDefault
+                          ? const Icon(Icons.check_circle, color: AppTheme.success, size: 18)
+                          : const SizedBox()),
+                      DataCell(_actionButtons(
+                        onEdit: () => _showWarehouseDialog(warehouse: w),
+                        onDelete: () => _confirmDeleteWarehouse(w),
+                      )),
+                    ]))
+                .toList(),
+      ),
+    );
+  }
+
+  void _showWarehouseDialog({Warehouse? warehouse}) {
+    showAppDialog(
+      context: context,
+      builder: (ctx) => _WarehouseFormDialog(
+        warehouse: warehouse,
+        onSaved: () => ref.read(warehouseListProvider.notifier).reload(),
+      ),
+    );
+  }
+
+  Future<void> _confirmDeleteWarehouse(Warehouse w) async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        title: const Text('确认删除'),
+        content: Text('确认删除仓库「${w.name}」？'),
+        actions: [
+          TextButton(
+              onPressed: () => Navigator.of(ctx).pop(false),
+              child: const Text('取消')),
+          ElevatedButton(
+            onPressed: () => Navigator.of(ctx).pop(true),
+            style: ElevatedButton.styleFrom(
+                backgroundColor: AppTheme.danger, foregroundColor: Colors.white),
+            child: const Text('删除'),
+          ),
+        ],
+      ),
+    );
+    if (confirmed == true && mounted) {
+      try {
+        await ref.read(warehouseListProvider.notifier).deleteWarehouse(w.id);
+        if (mounted) {
+          ScaffoldMessenger.of(context).showSnackBar(
+              const SnackBar(content: Text('删除成功'), backgroundColor: AppTheme.success));
+        }
+      } catch (e) {
+        if (mounted) {
+          ScaffoldMessenger.of(context).showSnackBar(
+              SnackBar(content: Text('删除失败：$e'), backgroundColor: AppTheme.danger));
+        }
+      }
+    }
+  }
+
   Future<void> _showOptionDialog({
     required String title,
     required bool hasQuantity,
@@ -535,3 +656,119 @@ class _ProductsScreenState extends ConsumerState<ProductsScreen> {
     );
   }
 }
+
+class _WarehouseFormDialog extends ConsumerStatefulWidget {
+  final Warehouse? warehouse;
+  final VoidCallback onSaved;
+
+  const _WarehouseFormDialog({this.warehouse, required this.onSaved});
+
+  @override
+  ConsumerState<_WarehouseFormDialog> createState() => _WarehouseFormDialogState();
+}
+
+class _WarehouseFormDialogState extends ConsumerState<_WarehouseFormDialog> {
+  final _formKey = GlobalKey<FormState>();
+  late final TextEditingController _nameCtrl;
+  late final TextEditingController _locationCtrl;
+  late bool _isDefault;
+  bool _saving = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _nameCtrl = TextEditingController(text: widget.warehouse?.name ?? '');
+    _locationCtrl = TextEditingController(text: widget.warehouse?.location ?? '');
+    _isDefault = widget.warehouse?.isDefault ?? false;
+  }
+
+  @override
+  void dispose() {
+    _nameCtrl.dispose();
+    _locationCtrl.dispose();
+    super.dispose();
+  }
+
+  Future<void> _save() async {
+    if (!_formKey.currentState!.validate()) return;
+    setState(() => _saving = true);
+    final data = {
+      'name': _nameCtrl.text.trim(),
+      if (_locationCtrl.text.trim().isNotEmpty) 'location': _locationCtrl.text.trim(),
+      'is_default': _isDefault,
+    };
+    try {
+      final notifier = ref.read(warehouseListProvider.notifier);
+      if (widget.warehouse != null) {
+        await notifier.updateWarehouse(widget.warehouse!.id, data);
+      } else {
+        await notifier.createWarehouse(data);
+      }
+      if (mounted) {
+        Navigator.of(context).pop();
+        widget.onSaved();
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+          content: Text(widget.warehouse != null ? '仓库更新成功' : '仓库创建成功'),
+          backgroundColor: AppTheme.success,
+        ));
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(content: Text('保存失败：$e'), backgroundColor: AppTheme.danger));
+      }
+    } finally {
+      if (mounted) setState(() => _saving = false);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: Text(widget.warehouse != null ? '编辑仓库' : '新建仓库'),
+      content: SizedBox(
+        width: context.dialogWidth(400),
+        child: Form(
+          key: _formKey,
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              TextFormField(
+                controller: _nameCtrl,
+                decoration: const InputDecoration(labelText: '仓库名称'),
+                validator: (v) => (v == null || v.isEmpty) ? '不能为空' : null,
+              ),
+              const SizedBox(height: 12),
+              TextFormField(
+                controller: _locationCtrl,
+                decoration: const InputDecoration(labelText: '位置'),
+              ),
+              const SizedBox(height: 12),
+              CheckboxListTile(
+                title: const Text('设为默认仓库'),
+                value: _isDefault,
+                onChanged: (v) => setState(() => _isDefault = v ?? false),
+                contentPadding: EdgeInsets.zero,
+              ),
+            ],
+          ),
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: const Text('取消'),
+        ),
+        ElevatedButton(
+          onPressed: _saving ? null : _save,
+          child: _saving
+              ? const SizedBox(
+                  width: 16,
+                  height: 16,
+                  child: CircularProgressIndicator(strokeWidth: 2))
+              : const Text('保存'),
+        ),
+      ],
+    );
+  }
+}