feat: 调整会话历史记录 本月 的时间显示

将 星期 时间显示，改为 月-日 的展示形式

src/modules/conversation-history/BtnHistoryItemDelete.vue

@@ -138,6 +138,7 @@ const handleConfirmDelete = () => {
 .arco-modal.history-chat-remove-modal.arco-modal-simple .arco-modal-header .arco-modal-title {
   justify-content: flex-start;
   text-align: left;
+  font-weight: 400;
 }
 
 .arco-modal.history-chat-remove-modal.arco-modal-simple .arco-modal-header .arco-modal-title .arco-modal-title-icon {

src/modules/conversation-history/HistoryItem.vue

@@ -118,7 +118,8 @@ const time_display = computed(() => {
   }
 
   if (p_tp === 'month') {
-    return formatTimestamp2Weekend(tm_stp, cur_locale_value);
+    // return formatTimestamp2Weekend(tm_stp, cur_locale_value);
+    return formatTimestamp2Date(tm_stp, cur_locale_value);
   }
 
   if (p_tp === 'earlier') {