feat(user): 优化用户权限管理与扫码功能

- 添加 isAdmin 状态检查逻辑支持多种数据类型 (true/1/'1')
- 实现统一扫码按钮的管理员权限控制，仅管理员可查看
- 集成 saveStorageByLoginUser 工具函数统一处理登录用户信息存储
- 优化扫码取消操作的错误处理，区分用户主动取消与实际错误
- 同步本地存储中的用户信息以便其他钩子读取管理员标识

src/hooks/useUnifiedQRScan.ts

@@ -271,7 +271,14 @@ export function useUnifiedQRScan() {
             }
           },
           fail: (err) => {
-            reject(new Error(err.errMsg || '扫码失败'));
+            const msg = (err as any)?.errMsg || '';
+            // `scanCode:fail cancel` is a user-driven cancel; don't treat it as an error toast.
+            if (typeof msg === 'string' && msg.toLowerCase().includes('cancel')) {
+              cancelRef.current = true;
+              reject(new Error('取消扫码'));
+              return;
+            }
+            reject(new Error(msg || '扫码失败'));
           }
         });
       });
@@ -323,6 +330,11 @@ export function useUnifiedQRScan() {
       return result;
 
     } catch (err: any) {
+      // User cancelled scanning (e.g. `scanCode:fail cancel`).
+      if (cancelRef.current) {
+        reset();
+        return null;
+      }
       if (!cancelRef.current) {
         setState(UnifiedScanState.ERROR);
         const errorMessage = err.message || '处理失败';

src/hooks/useUser.ts

@@ -280,11 +280,14 @@ export const useUser = () => {
 
   // 检查用户是否是管理员
   const isAdmin = () => {
-    return user?.isAdmin === true;
+    // Some backends use `1/0` (or `1/2`) instead of boolean.
+    const v: any = (user as any)?.isAdmin;
+    return v === true || v === 1 || v === '1';
   };
 
   const isSuperAdmin = () => {
-    return user?.isSuperAdmin === true;
+    const v: any = (user as any)?.isSuperAdmin;
+    return v === true || v === 1 || v === '1';
   };
 
   // 获取用户余额