frontend: some changes

crates/frontend/public/templates/pages/addressbook.html

@@ -4,6 +4,11 @@
 {% endblock %}
 
 {% block content %}
-<h1>Test</h1>
-<a href="/frontend/user/{{ owner }}">Back</a>
+{% let name = addressbook.displayname.to_owned().unwrap_or(addressbook.id.to_owned()) %}
+<h1>{{ name }}</h1>
+{% if let Some(description) = addressbook.description %}<p>{{ description }}</p>{% endif%}
+
+<pre>{{ addressbook|yaml }}</pre>
+
+<a href="/frontend/user/{{ addressbook.principal }}">Back</a>
 {% endblock %}