Prefix homepage card domains with @

     $ _stripped_onion = onion.lstrip("x")
     $ _prefix_length = len(onion) - len(_stripped_onion)
     <a class=u-url rel=me
-        href=http://$onion><code>$_stripped_onion[:12-_prefix_length]</code></a> &bull;
-<code><a class="u-url u-uid" rel=me href=/>$tx.host.name</code>
+        href=http://$onion><code>@$_stripped_onion[:12-_prefix_length]</code></a> &bull;
+<code><a class="u-url u-uid" rel=me href=/>@$tx.host.name</code>
 $if email := get_first(owner, "email"):
     &bull; <a class=u-email href=mailto:$owner["email"][0]><code>$owner["email"][0]</code></a>
 &bull; <a href=/owner/actor><code>@$owner["nickname"][0]@$tx.host.name</code></a>