mastodon/app/views/layouts/admin.html.haml

- content_for :header_tags do
  = javascript_include_tag 'application_public'
  
- content_for :content do
  .admin-wrapper
    .sidebar
      = link_to root_path do
        = image_tag 'logo.png', class: 'logo'

      = render_navigation
    .content
      = yield

= render template: "layouts/application"