添加元素图层合并模式由正片叠底改为默认

src/component/Detail/DesignDetail.vue

@@ -190,7 +190,9 @@ export default defineComponent({
 		watch(()=>detailData.selectDetail,async (newValue,oldValue)=>{
 			detailData.imgDomIndex = detailData.frontBack.front.findIndex((item:any)=>item.id == newValue.id)
 			if(newValue?.path)await getSketchSize()
-			detailData.canvasKey += 1
+			if(newValue?.id && oldValue?.id && (newValue.id != oldValue.id)){
+				detailData.canvasKey += 1
+			}
 			// privewDetail(oldValue)
 		},{immediate: true})
 		provide('getCanvasIfEdit',detailData.getCanvasIfEdit)