更新二维码管理视图中的搜索参数，将搜索字段从 'search' 修改为 'qrCode'

src/views/QrCodeManageView.vue

@@ -138,7 +138,7 @@ const fetchData = async () => {
       params.startDate = useDateFormat(filters.value.startDate, 'YYYY-MM-DD').value
     if (filters.value.endDate) params.endDate = useDateFormat(filters.value.endDate, 'YYYY-MM-DD').value
 
-    if (filters.value.search?.trim()) params.search = filters.value.search.trim()
+    if (filters.value.search?.trim()) params.qrCode = filters.value.search.trim()
 
     const response = await queryQrCodes(params)