fix: rename bug card anchor to div with _card_link include and add admin role tests

The bug list template wraps each bug in a `<div class="bug-card card-link-host">` instead of a bare `<a>`, pulling in `_card_link.html` for proper link semantics. Two new integration tests (`test_bug_detail_renders_for_member` and `test_bug_detail_renders_for_admin`) verify that the `/bugs/{number}` endpoint returns 200 for both roles, that the "Close ticket" button is absent for members and present for admins, and that the JSON response exposes `viewer_is_admin` as a boolean. Supporting helpers `_role_user` and `_open_ticket` create users with a specific role and open a Gitea-backed ticket.

devplacepy/templates/bugs.html

@@ -25,7 +25,10 @@
     {% else %}
     <div class="bugs-list">
         {% for bug in bugs %}
-        <a class="bug-card" href="/bugs/{{ bug.number }}">
+        <div class="bug-card card-link-host">
+            {% set _href = "/bugs/" ~ bug.number %}
+            {% set _label = bug.title %}
+            {% include "_card_link.html" %}
             <div class="bug-card-header">
                 <span class="bug-number">#{{ bug.number }}</span>
                 <span class="bug-title">{{ bug.title }}</span>
@@ -41,7 +44,7 @@
                 <span class="bug-dot">&middot;</span>
                 <span class="bug-comments">{{ bug.comments_count }} comment{{ '' if bug.comments_count == 1 else 's' }}</span>
             </div>
-        </a>
+        </div>
         {% else %}
         <div class="empty-state">No bug reports yet.</div>
         {% endfor %}