优化 图 层级

src/views/components/element/ImageElement/index.vue

@@ -7,6 +7,7 @@
       left: elementInfo.left + 'px',
       width: elementInfo.width + 'px',
       height: elementInfo.height + 'px',
+      zIndex: isCliping?9:0,
     }"
   >
     <div