fix(chat-widget): corrige referência a chatData não definida

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/chat/chat-widget.tsx

@@ -729,7 +729,7 @@ export function ChatWidget() {
                   <div>
                     <div className="flex items-center gap-2">
                       <p className="text-sm font-semibold text-slate-900">
-                        #{activeSession?.ticketRef ?? chatData?.ticketId?.slice(-4)}
+                        #{activeSession?.ticketRef ?? activeTicketId?.slice(-4)}
                       </p>
                       {/* Indicador online/offline */}
                       {liveChat?.hasMachine && (