fix(vuepress-theme-reco): fix tag & abstract error

1. tag click 404
2. img max-width in abstract

packages/vuepress-theme-reco/components/PageInfo.vue

@@ -85,7 +85,9 @@ export default {
   },
   methods: {
     goTags (tag) {
-      this.$router.push({ path: `/tags/${tag}/` })
+      if (this.$route.path !== `/tag/${tag}/`) {
+        this.$router.push({ path: `/tag/${tag}/` })
+      }
     }
   }
 }

packages/vuepress-theme-reco/layouts/Tag.vue

@@ -71,7 +71,9 @@ export default {
       this.$emit('currentTag', tag)
     },
     tagClick (tagInfo) {
+      if (this.$route.path !== tagInfo.path) {
         this.$router.push({ path: tagInfo.path })
+      }
     },
     // 获取当前页码
     getCurrentPage (page) {

packages/vuepress-theme-reco/layouts/Tags.vue

@@ -63,7 +63,9 @@ export default {
   methods: {
 
     tagClick (tagInfo) {
+      if (this.$route.path !== tagInfo.path) {
         this.$router.push({ path: tagInfo.path })
+      }
     },
 
     getCurrentTag (tag) {

packages/vuepress-theme-reco/styles/theme.styl

@@ -73,6 +73,10 @@ body
   img
     max-width 100%
 
+.abstract
+  img
+    max-width 100%
+
 a
   font-weight 500
   color $accentColor