Add avatar color, initials structure, and admin nav dropdown

- app.py: avatar_color Jinja filter using deterministic hash → lt-avatar--orange/green/purple
- base.html: proper lt-avatar--sm with lt-avatar-initials span and color class; multi-word initials support
- base.html: admin users get lt-nav-dropdown for Suppressions; non-admins see flat link; mobile drawer hides Suppressions for non-admins

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -27,6 +27,12 @@ logger = logging.getLogger('gandalf.web')
 
 app = Flask(__name__)
 
+_AVATAR_COLORS = ['lt-avatar--orange', 'lt-avatar--green', 'lt-avatar--purple', '']
+
+@app.template_filter('avatar_color')
+def avatar_color_filter(name: str) -> str:
+    return _AVATAR_COLORS[abs(hash(name)) % len(_AVATAR_COLORS)]
+
 _cfg = None
 
 

templates/base.html

@@ -42,9 +42,11 @@
       <a href="{{ url_for('inspector') }}"
          class="lt-nav-drawer-link{% if request.endpoint == 'inspector' %} active{% endif %}"
          {% if request.endpoint == 'inspector' %}aria-current="page"{% endif %}>Inspector</a>
+      {% if user.groups and 'admin' in user.groups %}
       <a href="{{ url_for('suppressions_page') }}"
          class="lt-nav-drawer-link{% if request.endpoint == 'suppressions_page' %} active{% endif %}"
          {% if request.endpoint == 'suppressions_page' %}aria-current="page"{% endif %}>Suppressions</a>
+      {% endif %}
     </nav>
   </div>
   <div id="lt-nav-overlay" class="lt-nav-drawer-overlay"></div>
@@ -93,20 +95,49 @@
            {% if request.endpoint == 'inspector' %}aria-current="page"{% endif %}>
           Inspector
         </a>
+        {% if user.groups and 'admin' in user.groups %}
+        <div class="lt-nav-dropdown" data-action="toggle-nav-dropdown">
+          <a href="#"
+             class="lt-nav-link{% if request.endpoint == 'suppressions_page' %} active{% endif %}"
+             role="button"
+             aria-haspopup="true"
+             aria-expanded="false"
+             aria-controls="lt-admin-dropdown-menu">
+            Admin &#x25BE;
+          </a>
+          <ul class="lt-nav-dropdown-menu"
+              id="lt-admin-dropdown-menu"
+              role="menu"
+              aria-label="Admin menu">
+            <li role="none">
+              <a href="{{ url_for('suppressions_page') }}" role="menuitem"
+                 class="{% if request.endpoint == 'suppressions_page' %}active{% endif %}">
+                Suppressions
+              </a>
+            </li>
+          </ul>
+        </div>
+        {% else %}
         <a href="{{ url_for('suppressions_page') }}"
            class="lt-nav-link{% if request.endpoint == 'suppressions_page' %} active{% endif %}"
            {% if request.endpoint == 'suppressions_page' %}aria-current="page"{% endif %}>
           Suppressions
         </a>
+        {% endif %}
       </nav>
     </div>
 
     <div class="lt-header-right">
       {% set _uname = user.name or user.username %}
-      <div class="lt-avatar" title="{{ _uname }}" aria-label="{{ _uname }}">{{ _uname[0] | upper }}</div>
+      {% set _words = _uname.split() %}
+      {% set _initials = (_words[0][0] ~ (_words[1][0] if _words|length > 1 else ''))|upper %}
+      <div class="lt-avatar lt-avatar--sm {{ _uname | avatar_color }}"
+           aria-hidden="true" title="{{ _uname }}">
+        <span class="lt-avatar-initials">{{ _initials }}</span>
+      </div>
       <span class="lt-header-user">{{ _uname }}</span>
       {% if user.groups and 'admin' in user.groups %}
-      <span class="lt-badge lt-badge-admin">admin</span>
+      <span class="lt-badge lt-badge-admin" aria-label="Administrator">ADMIN</span>
       {% endif %}
       <button type="button" class="lt-theme-btn" id="lt-theme-btn"
               aria-label="Toggle theme" title="Toggle light/dark mode">&#x2600;</button>