Melhora UX do chat no desktop

apps/desktop/src/chat/ChatWidget.tsx

@@ -277,6 +277,8 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
     | { type: "message"; messageId: string; behavior: ScrollBehavior; markRead: boolean }
     | null
   >(null)
+  const autoReadInFlightRef = useRef(false)
+  const lastAutoReadCountRef = useRef<number | null>(null)
 
   const unreadAgentMessageIds = useMemo(() => getUnreadAgentMessageIds(messages, unreadCount), [messages, unreadCount])
   const firstUnreadAgentMessageId = unreadAgentMessageIds[0] ?? null
@@ -374,9 +376,9 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
   }, [apiBaseUrl, machineToken, ticketId])
 
   const markUnreadMessagesRead = useCallback(async () => {
-    if (unreadCount <= 0) return
+    if (unreadCount <= 0) return false
     const ids = getUnreadAgentMessageIds(messages, unreadCount)
-    if (ids.length === 0) return
+    if (ids.length === 0) return false
 
     const chunks = chunkArray(ids, MARK_READ_BATCH_SIZE)
     for (const chunk of chunks) {
@@ -385,8 +387,26 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
         messageIds: chunk as Id<"ticketChatMessages">[],
       })
     }
+    return true
   }, [messages, ticketId, unreadCount, markMessagesRead])
 
+  const maybeAutoMarkRead = useCallback(async () => {
+    if (autoReadInFlightRef.current) return
+    if (!hasSession || unreadCount <= 0) return
+    if (isMinimizedRef.current || !isAtBottomRef.current) return
+    if (lastAutoReadCountRef.current === unreadCount) return
+
+    autoReadInFlightRef.current = true
+    try {
+      const didMark = await markUnreadMessagesRead()
+      if (didMark) {
+        lastAutoReadCountRef.current = unreadCount
+      }
+    } finally {
+      autoReadInFlightRef.current = false
+    }
+  }, [hasSession, unreadCount, markUnreadMessagesRead])
+
   // Auto-scroll quando novas mensagens chegam (se ja estava no bottom)
   const prevMessagesLengthRef = useRef(messages.length)
   useEffect(() => {
@@ -430,6 +450,14 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
     }
   }, [isMinimized, messages, markUnreadMessagesRead, scrollToBottom, scrollToMessage])
 
+  useEffect(() => {
+    if (unreadCount === 0) {
+      lastAutoReadCountRef.current = null
+      return
+    }
+    maybeAutoMarkRead().catch((err) => console.error("Falha ao auto-marcar mensagens:", err))
+  }, [isMinimized, isAtBottom, unreadCount, maybeAutoMarkRead])
+
   // Sincronizar estado minimizado com tamanho da janela
   useEffect(() => {
     const mountTime = Date.now()
@@ -538,7 +566,7 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
 
     setIsMinimized(false)
     try {
-      await invoke("set_chat_minimized", { ticketId, minimized: false })
+      await invoke("open_chat_window", { ticketId, ticketRef: ticketRef ?? 0 })
     } catch (err) {
       console.error("Erro ao expandir janela:", err)
     }