folder: design update

src/components/frame/Folder.vue

@@ -15,6 +15,7 @@
     </div>
 
     <div class="previews fill-block">
+      <div class="preview-container fill-block">
         <div class="img-outer" v-for="info of previews" :key="info.fileid">
           <img
             class="fill-block"
@@ -23,6 +24,7 @@
           />
         </div>
       </div>
+    </div>
   </router-link>
 </template>
 
@@ -185,11 +187,13 @@ export default class Folder extends Mixins(GlobalMixin, UserConfig) {
   position: absolute;
   padding: 2px;
   box-sizing: border-box;
-  @media (max-width: 768px) {
-    padding: 1px;
+
+  .preview-container {
+    border-radius: 10px;
+    overflow: hidden;
   }
 
-  > .img-outer {
+  .img-outer {
     background-color: var(--color-background-dark);
     padding: 0;
     margin: 0;