chore: 在弹窗内删除所有记忆变量保存后记忆下拉列表不显示记忆变量项

src/views/personal-space/personal-app-setting/components/memory-variable-modal.vue

@@ -109,7 +109,9 @@ function handleMemoryVariableFormSave() {
     const isAllValid = results.every((result) => result)
 
     if (isAllValid) {
-      personalAppConfigStore.commConfig.variableStructure = memoryVariableTable.value
+      personalAppConfigStore.commConfig.variableStructure = memoryVariableTable.value.length
+        ? memoryVariableTable.value
+        : null
       handleMemoryPreviewModalClose(true)
       window.$message.success(t('common_module.save_success_message'))
     } else {