bug fix: 管理中心-我的素材-素材列表：文件夹图标样式

packages/qjkankan-editor/src/views/material/audio/index.vue

@@ -103,7 +103,7 @@
           </div>
           <div
             v-else-if="headerItem.type == 'audio' && lineData.type === 'dir'"
-            class="img dir"
+            class="img dirIcon"
           >
             <img
               :src="require('@/assets/images/icons/folder-blue.png')"

packages/qjkankan-editor/src/views/material/pano/index.vue

@@ -98,7 +98,7 @@
           </div>
           <div
             v-else-if="headerItem.type == 'image' && lineData.type === 'dir'"
-            class="img dir"
+            class="img dirIcon"
           >
             <img
               :src="require('@/assets/images/icons/folder-blue.png')"

packages/qjkankan-editor/src/views/material/style.less

@@ -66,6 +66,7 @@
     .img.dirIcon {
       > img {
         object-fit: contain;
+        background: initial;
       }
     }
     .audio{

packages/qjkankan-editor/src/views/material/video/index.vue

@@ -103,7 +103,7 @@
           </div>
           <div
             v-else-if="headerItem.type == 'image' && lineData.type === 'dir'"
-            class="img dir"
+            class="img dirIcon"
           >
             <img
               :src="require('@/assets/images/icons/folder-blue.png')"
@@ -467,7 +467,7 @@ export default {
 </script>
 
 <style lang="less" scoped>
-.img {
+.img:not(.dirIcon) {
   position: relative;
   width: 89px !important;
   .video-icon-mask {