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/core/config/app_info.dart

@@ -12,6 +12,11 @@ class AppInfo {
   static String provider = '';
   static String website = '';
   static String email = '';
+  static String phone = '';
+  static String wechat = '';
+  static String termsUrl = '';
+  static String privacyUrl = '';
+  static String docsUrl = '';
 
   /// 加载配置文件。失败时保留为空（不影响应用启动）。
   static Future<void> load() async {
@@ -21,6 +26,11 @@ class AppInfo {
       provider = (map['provider'] as String?) ?? '';
       website = (map['website'] as String?) ?? '';
       email = (map['email'] as String?) ?? '';
+      phone = (map['phone'] as String?) ?? '';
+      wechat = (map['wechat'] as String?) ?? '';
+      termsUrl = (map['terms_url'] as String?) ?? '';
+      privacyUrl = (map['privacy_url'] as String?) ?? '';
+      docsUrl = (map['docs_url'] as String?) ?? '';
     } catch (e) {
       debugPrint('AppInfo.load failed: $e');
     }