修复缩略图预览;优化下载链接;(同步更新)

src/components/DashBoard.vue

@@ -40,13 +40,13 @@
     <el-button @click="isViewingTag = true">查看标签</el-button>
     <hr>
     <el-button v-if="isLion" @click="resetUndone">重置任务</el-button>
-    <div v-show="'images' in thumbnailGallery">
+    <div v-show="thumbnailGallery.url !== undefined">
       <span>
         {{thumbnailGallery.shortName}}<br>
         <el-space v-show="thumbnailGallery.tag !== ''">标签:{{thumbnailGallery.tag}}</el-space>
       </span><br>
       <picture>
-        <el-image :src="thumbnailGallery.url" :preview-src-list="thumbnailGallery.images" :initial-index="0" class="preview"
+        <el-image :src="thumbnailGallery.url" :preview-src-list="[thumbnailGallery.images[0], ]" :initial-index="0" class="preview"
         style="width: 300px; height: 300px" fit="contain"/>
       </picture>
     </div>
@@ -232,6 +232,8 @@ let tags = computed(() => {
 })
 
 let thumbnailGallery = computed(() => {
+  if(store.state.thumbnailGallery.images === undefined)
+    store.state.thumbnailGallery.images = []
   return store.state.thumbnailGallery
 })