fix: author_slug → author?.slug в TaskModal

src/components/TaskModal.tsx

@@ -251,7 +251,7 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
                   <div key={msg.id} className="text-sm">
                     <div className="flex items-center gap-1 text-xs text-[var(--muted)] mb-0.5">
                       <span>{AUTHOR_ICON[msg.author_type] || "👤"}</span>
-                      <span className="font-medium">{msg.author_slug}</span>
+                      <span className="font-medium">{msg.author?.slug || msg.author_id}</span>
                       <span>·</span>
                       <span>{new Date(msg.created_at).toLocaleString("ru-RU", { hour: "2-digit", minute: "2-digit" })}</span>
                     </div>