Settings page: small muted Admin link (#102)

internal/web/templates/settings.html

@@ -7,6 +7,7 @@
     </div>
     <div class="settings-body">
       <p>Settings are under construction.</p>
+      <p class="admin-link-row"><a class="admin-link" href="/admin">Admin</a></p>
     </div>
   </div>
 </div>