retrait de page html redondantes, ajout de la modification des username et affichage des userrname au lieu des noms complets

templates/layouts/macros.html

@@ -43,8 +43,8 @@
 {# User Avatar Macro - renders user avatar with name #}
 {% macro user_avatar(user, size='sm') %}
 <div class="user-mini">
-    <div class="avatar-{{ size }}">{{ user.full_name[:2] | upper }}</div>
-    <span>{{ user.full_name }}</span>
+<div class="avatar-{{ size }}">{{ user.username[:2] | upper }}</div>
+<span>{{ user.username }}</span>
 </div>
 {% endmacro %}