refactor:add keep-alive && component add name

src/views/errorPage/401.vue

@@ -30,6 +30,7 @@
 import errGif from '@/assets/401_images/401.gif'
 
 export default {
+  name: 'page401',
   data() {
     return {
       errGif: errGif + '?' + +new Date(),

src/views/errorPage/404.vue

@@ -23,6 +23,7 @@ import img_404 from '@/assets/404_images/404.png'
 import img_404_cloud from '@/assets/404_images/404_cloud.png'
 
 export default {
+  name: 'page404',
   data() {
     return {
       img_404,