Update ticket UI for email comments

todosrht/templates/ticket.html

@@ -324,6 +324,7 @@
       {% endif %}
       {% endfor %}
       {% if TicketAccess.comment in access %}
+      {% if current_user %}
       <form
         {% if any(ticket.comments) %}
         style="margin-top: 1rem"
@@ -383,6 +384,20 @@
         {% endif %}
         {% endif %}
       </form>
+      {% elif cfg("todo.sr.ht::mail", "posting-domain") %}
+      <a
+        class="btn btn-primary"
+        href="{{get_origin("meta.sr.ht", external=True)}}/register"
+      >Register here {{icon('caret-right')}}</a>
+      or
+      <a href="{{oauth_url}}">
+        Log in {{icon('caret-right')}}
+      </a>
+      to comment, or
+      <a
+        href="mailto:{{tracker.owner.canonical_name}}/{{tracker.name}}/{{ticket.scoped_id}}@{{cfg("todo.sr.ht::mail", "posting-domain")}}"
+      >comment via email</a>.
+      {% endif %}
       {% else %}
       {% if not ticket.comments %}
       <p>It's a bit quiet in here.</p>