fix: 背景图支持还原默认

src/views/login.vue

@@ -89,7 +89,7 @@ function fnGetCaptcha() {
 // 判断是否有背景地址
 const calcBG = computed(() => {
   const bgURL = appStore.getLoginBackground;
-  if (bgURL) {
+  if (bgURL && bgURL !== '#') {
     return {
       backgroundImage: `url(${bgURL})`,
       backgroundPosition: 'center',
@@ -101,9 +101,6 @@ const calcBG = computed(() => {
 
 onMounted(() => {
   fnGetCaptcha();
-  const container = document.getElementsByClassName('container').item(0);
-  if (container) {
-  }
 });
 
 /**改变多语言 */