fix: update breadcrumbs-nav for posts to ensure consistency

src/views/Posts/ListView.vue

@@ -2,6 +2,7 @@
   <div class="container mx-auto section" v-if="group">
     <breadcrumbs-nav
       :links="[
+        { name: RouteName.MY_GROUPS, text: t('My groups') },
         {
           name: RouteName.GROUP,
           params: { preferredUsername: usernameWithDomain(group) },

src/views/Posts/PostView.vue

@@ -9,6 +9,11 @@
           params: { preferredUsername: usernameWithDomain(post.attributedTo) },
           text: displayName(post.attributedTo),
         },
+        {
+          name: RouteName.POSTS,
+          params: { preferredUsername: usernameWithDomain(post.attributedTo) },
+          text: $t('Posts'),
+        },
         {
           name: RouteName.POST,
           params: { slug: post.slug },