实现消息记录功能，包括增删改查和标记已读，优化消息列表展示和未读消息计数

Web/src/views/TransactionsRecord.vue

@@ -297,7 +297,6 @@ const loadData = async (isRefresh = false) => {
 // 下拉刷新
 const onRefresh = () => {
   finished.value = false
-  lastId.value = null
   transactionList.value = []
   loadData(false)
 }
@@ -315,8 +314,6 @@ const onSearchChange = () => {
 
 const onSearch = () => {
   // 重置分页状态并刷新数据
-  lastId.value = null
-  lastTime.value = null
   transactionList.value = []
   finished.value = false
   loadData(true)