pinafore/routes/_components/status/StatusSidebar.html

<a class="status-sidebar size-{size}"
   href="/accounts/{originalAccountId}"
   focus-key={focusKey}
   aria-hidden="true"
>
  <Avatar account={originalAccount}
          isLink="true"
          {size} />
</a>
<style>
  .status-sidebar {
    grid-area: sidebar;
    margin-right: 15px;
  }

  .status-sidebar.size-small {
    width: 48px;
    height: 48px;
  }

  .status-sidebar.size-medium {
    width: 64px;
    height: 64px;
  }

  @media (max-width: 767px) {
    .status-sidebar {
      margin-right: 5px;
    }
  }
</style>
<script>
  import Avatar from '../Avatar.html'
  export default {
    components: {
      Avatar
    },
    computed: {
      focusKey: ({ uuid }) => `status-author-avatar-${uuid}`,
      size: ({ isStatusInOwnThread }) => isStatusInOwnThread ? 'medium' : 'small'
    }
  }
</script>