Fix duration format and minimized chat layout

- Format duration as hours+minutes when > 60min (e.g., 2h 26min)
- Change minimized chat to compact chip style (matching web)

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

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

src/components/tickets/ticket-chat-history.tsx

@@ -54,6 +54,18 @@ type ChatSession = {
 
 const MESSAGES_PER_PAGE = 20
 
+function formatDuration(minutes: number): string {
+  if (minutes < 60) {
+    return `${minutes} min`
+  }
+  const hours = Math.floor(minutes / 60)
+  const mins = minutes % 60
+  if (mins === 0) {
+    return `${hours}h`
+  }
+  return `${hours}h ${mins}min`
+}
+
 function MessageAttachmentPreview({ attachment }: { attachment: { storageId: string; name: string; type: string | null } }) {
   const getFileUrl = useAction(api.files.getUrl)
   const [loading, setLoading] = useState(false)
@@ -147,7 +159,7 @@ function ChatSessionCard({ session, isExpanded, onToggle }: { session: ChatSessi
               <span>-</span>
               <span>{session.messageCount} mensagens</span>
               <span>-</span>
-              <span>{duration} min</span>
+              <span>{formatDuration(duration)}</span>
             </div>
           </div>
         </div>