添加报表页面，更新用户管理和注册功能

admin-frontend/src/components/StatsCards.vue

@@ -8,8 +8,8 @@ const props = defineProps({
 
 const items = computed(() => [
   { key: 'total_users', label: '总用户数' },
-  { key: 'approved_users', label: '已审核' },
-  { key: 'pending_users', label: '待审核' },
+  { key: 'new_users_today', label: '今日注册' },
+  { key: 'new_users_7d', label: '近7天注册' },
   { key: 'total_accounts', label: '总账号数' },
   { key: 'vip_users', label: 'VIP用户' },
 ])
@@ -49,4 +49,3 @@ const items = computed(() => [
   color: var(--app-muted);
 }
 </style>
-