feat: melhorias visuais na janela de chat do desktop

- Desabilita sombra da janela para transparência funcionar corretamente
- Adiciona badge de mensagens não lidas no chip minimizado
- Ajusta tamanho da janela minimizada para acomodar badge e texto offline
- Mostra chat minimizado com badge quando há novas mensagens (menos intrusivo)
- Adiciona listener para atualização de unread count em tempo real

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

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

apps/desktop/src/chat/ChatWidget.tsx

@@ -49,6 +49,7 @@ export function ChatWidget({ ticketId }: ChatWidgetProps) {
   const [hasSession, setHasSession] = useState(false)
   const [pendingAttachments, setPendingAttachments] = useState<UploadedAttachment[]>([])
   const [isMinimized, setIsMinimized] = useState(false)
+  const [unreadCount, setUnreadCount] = useState(0)
 
   const messagesEndRef = useRef<HTMLDivElement>(null)
   const lastFetchRef = useRef<number>(0)
@@ -186,7 +187,7 @@ export function ChatWidget({ ticketId }: ChatWidgetProps) {
     init()
 
     // Listener para eventos de nova mensagem do Tauri
-    const unlistenPromise = listen<{ ticketId: string; message: ChatMessage }>(
+    const unlistenNewMessage = listen<{ ticketId: string; message: ChatMessage }>(
       "raven://chat/new-message",
       (event) => {
         if (event.payload.ticketId === ticketId) {
@@ -202,12 +203,25 @@ export function ChatWidget({ ticketId }: ChatWidgetProps) {
       }
     )
 
+    // Listener para atualização de mensagens não lidas
+    const unlistenUnread = listen<{ totalUnread: number; sessions: Array<{ ticketId: string; unreadCount: number }> }>(
+      "raven://chat/unread-update",
+      (event) => {
+        // Encontrar o unread count para este ticket
+        const session = event.payload.sessions?.find(s => s.ticketId === ticketId)
+        if (session) {
+          setUnreadCount(session.unreadCount ?? 0)
+        }
+      }
+    )
+
     return () => {
       mounted = false
       if (pollIntervalRef.current) {
         clearInterval(pollIntervalRef.current)
       }
-      unlistenPromise.then(unlisten => unlisten())
+      unlistenNewMessage.then(unlisten => unlisten())
+      unlistenUnread.then(unlisten => unlisten())
     }
   }, [ticketId, loadConfig, fetchMessages, fetchSessionInfo])
 
@@ -378,7 +392,7 @@ export function ChatWidget({ ticketId }: ChatWidgetProps) {
       <div className="flex h-full w-full items-end justify-end bg-transparent">
         <button
           onClick={handleExpand}
-          className="flex items-center gap-2 rounded-full bg-black px-4 py-2 text-white shadow-lg hover:bg-black/90"
+          className="relative flex items-center gap-2 rounded-full bg-black px-4 py-2 text-white shadow-lg hover:bg-black/90"
         >
           <MessageCircle className="size-4" />
           <span className="text-sm font-medium">
@@ -386,6 +400,12 @@ export function ChatWidget({ ticketId }: ChatWidgetProps) {
           </span>
           <span className="size-2 rounded-full bg-emerald-400" />
           <ChevronUp className="size-4" />
+          {/* Badge de mensagens não lidas */}
+          {unreadCount > 0 && (
+            <span className="absolute -right-1 -top-1 flex size-5 items-center justify-center rounded-full bg-red-500 text-xs font-bold">
+              {unreadCount > 9 ? "9+" : unreadCount}
+            </span>
+          )}
         </button>
       </div>
     )