修复勋章记录管理页面报错问题

src/views/medal/MedalRecord.vue

@@ -42,7 +42,7 @@
             style="width: 100px; height: 100px"
             :src="scope.row.picUrl"
             :zoom-rate="1.1"
-            :preview-src-list="scope.row.picUrl"
+            :preview-src-list="[scope.row.picUrl || '']"
             fit="scale-down"
             preview-teleported="true"
             hide-on-click-modal="true"
@@ -103,7 +103,7 @@
 
     <!-- 发放勋章弹窗 -->
     <el-dialog
-      destroy-on-close
+      
       class="pub"
       v-model="grantDialog"
       title="发放勋章"