fix

frontend/src/pages/Communication.jsx

@@ -24,7 +24,9 @@ function fmtSize(bytes) {
 
 function initials(name) {
   if (!name) return '?';
-  return name.split(' ').map(w => w[0]).join('').toUpperCase().slice(0, 2);
+  // Si c'est un email, prendre les 2 premières lettres avant le @
+  if (name.includes('@')) return name.split('@')[0].slice(0, 2).toUpperCase();
+  return name.split(' ').filter(Boolean).map(w => w[0]).join('').toUpperCase().slice(0, 2);
 }
 
 // ── Avatar lettres ─────────────────────────────────────────────────────────
@@ -927,7 +929,7 @@ export default function Communication() {
                     className={`comm-list-row${selectedTicket === t.id ? ' selected' : ''}`}
                     onClick={() => openTicket(t.id)}
                   >
-                    <UserAvatar name={t.user_name ?? user?.name} size={38} />
+                    <UserAvatar name={t.user_name ?? t.user_email ?? user?.displayName ?? user?.email} size={38} />
                     <div className="comm-list-row-body">
                       <div className="comm-list-row-top">
                         <span className="comm-list-row-name">{t.user_name ?? 'Moi'}</span>