fix: 修复代码生成v3模板时间控件between选择后清空报错问题

Author: insistence

ruoyi-fastapi-backend/module_generator/templates/vue/v3/index-tree.vue.jinja2

@@ -318,7 +318,7 @@ function getList() {
   {% for column in columns %}
   {% if column.html_type == "datetime" and column.query_type == "BETWEEN" %}
   {% set AttrName = column.python_field[0] | upper + column.python_field[1:] %}
-  if (null != daterange{{ AttrName }} && '' != daterange{{ AttrName }}) {
+  if (null != daterange{{ AttrName }}.value && '' != daterange{{ AttrName }}.value) {
     queryParams.value.begin{{ AttrName }} = daterange{{ AttrName }}.value[0];
     queryParams.value.end{{ AttrName }} = daterange{{ AttrName }}.value[1];
   }

ruoyi-fastapi-backend/module_generator/templates/vue/v3/index.vue.jinja2

@@ -400,7 +400,7 @@ function getList() {
   {% for column in columns %}
   {% if column.html_type == "datetime" and column.query_type == "BETWEEN" %}
   {% set AttrName = column.python_field[0] | upper + column.python_field[1:] %}
-  if (null != daterange{{ AttrName }} && '' != daterange{{ AttrName }}) {
+  if (null != daterange{{ AttrName }}.value && '' != daterange{{ AttrName }}.value) {
     queryParams.value.begin{{ AttrName }} = daterange{{ AttrName }}.value[0];
     queryParams.value.end{{ AttrName }} = daterange{{ AttrName }}.value[1];
   }