fix: 统计数据列表改为3列2行排版

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

admin-h5/src/pages/statistics/index.vue

@@ -575,7 +575,7 @@ onMounted(async () => {
 }
 .info-grid {
   display: grid;
-  grid-template-columns: repeat(2, 1fr);
+  grid-template-columns: repeat(3, 1fr);
   gap: 12rpx;
 }
 .info-item {