fix: 修复时间范围条件选择后再清空而导致搜索条件错乱的bug

1）用户管理列表，选择“创建时间”后再点击清空，时间搜索条件并没真正清空
2）indexAction 函数里，也有类似问题

src/views/demo/curd/config/content.ts

@@ -18,8 +18,10 @@ const contentConfig: IContentConfig<UserPageQuery> = {
   indexAction: function (params) {
     if ("createAt" in params) {
       const createAt = params.createAt as string[];
-      params.startTime = createAt[0];
-      params.endTime = createAt[1];
+      if (createAt?.length > 1) {
+        params.startTime = createAt[0];
+        params.endTime = createAt[1];
+      }
       delete params.createAt;
     }
     return UserAPI.getPage(params);

src/views/demo/table-select/config/select.ts

@@ -84,8 +84,10 @@ const selectConfig: ISelectConfig = {
   indexAction: function (params) {
     if ("createAt" in params) {
       const createAt = params.createAt as string[];
-      params.startTime = createAt[0];
-      params.endTime = createAt[1];
+      if (createAt?.length > 1) {
+        params.startTime = createAt[0];
+        params.endTime = createAt[1];
+      }
       delete params.createAt;
     }
     return UserAPI.getPage(params);

src/views/system/user/index.vue

@@ -311,6 +311,9 @@ watch(dateTimeRange, (newVal) => {
   if (newVal) {
     queryParams.startTime = newVal[0];
     queryParams.endTime = newVal[1];
+  } else {
+    queryParams.startTime = undefined;
+    queryParams.endTime = undefined;
   }
 });