Redesign public profiles and toots (#8068)

app/controllers/concerns/account_controller_concern.rb

@@ -8,6 +8,7 @@ module AccountControllerConcern
   included do
     layout 'public'
     before_action :set_account
+    before_action :set_instance_presenter
     before_action :set_link_headers
     before_action :check_account_suspension
   end
@@ -18,6 +19,10 @@ module AccountControllerConcern
     @account = Account.find_local!(params[:account_username])
   end
 
+  def set_instance_presenter
+    @instance_presenter = InstancePresenter.new
+  end
+
   def set_link_headers
     response.headers['Link'] = LinkHeader.new(
       [