Add account migration UI (#11846)

Fix #10736

- Change data export to be available for non-functional accounts
- Change non-functional accounts to include redirecting accounts

app/helpers/settings_helper.rb

@@ -87,4 +87,12 @@ module SettingsHelper
       'desktop'
     end
   end
+
+  def compact_account_link_to(account)
+    return if account.nil?
+
+    link_to ActivityPub::TagManager.instance.url_for(account), class: 'name-tag', title: account.acct do
+      safe_join([image_tag(account.avatar.url, width: 15, height: 15, alt: display_name(account), class: 'avatar'), content_tag(:span, account.acct, class: 'username')], ' ')
+    end
+  end
 end