diff --git a/apps/desktop/src/chat/ChatHubWidget.tsx b/apps/desktop/src/chat/ChatHubWidget.tsx
index 8722add..0bc8a51 100644
--- a/apps/desktop/src/chat/ChatHubWidget.tsx
+++ b/apps/desktop/src/chat/ChatHubWidget.tsx
@@ -103,7 +103,8 @@ export function ChatHubWidget() {
     console.log("[ChatHub] Selecionando sessao:", { ticketId, ticketRef })
     try {
       console.log("[ChatHub] Chamando invoke open_chat_window...")
-      const result = await invoke("open_chat_window", { ticketId, ticketRef })
+      // Tauri 2 espera snake_case nos parametros
+      const result = await invoke("open_chat_window", { ticket_id: ticketId, ticket_ref: ticketRef })
       console.log("[ChatHub] Janela aberta com sucesso, result:", result)
     } catch (err) {
       console.error("[ChatHub] ERRO ao abrir janela de chat:", err)
diff --git a/apps/desktop/src/chat/ChatWidget.tsx b/apps/desktop/src/chat/ChatWidget.tsx
index e4964fc..7686b9d 100644
--- a/apps/desktop/src/chat/ChatWidget.tsx
+++ b/apps/desktop/src/chat/ChatWidget.tsx
@@ -292,7 +292,7 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
   useEffect(() => {
     const prevHasSession = prevHasSessionRef.current
     if (prevHasSession && !hasSession) {
-      invoke("close_chat_window", { ticketId }).catch((err) => {
+      invoke("close_chat_window", { ticket_id: ticketId }).catch((err) => {
         console.error("Erro ao fechar janela ao encerrar sessão:", err)
       })
     }
@@ -405,10 +405,10 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
 
     for (const chunk of chunks) {
       await invoke("mark_chat_messages_read", {
-        baseUrl: cfg.apiBaseUrl,
+        base_url: cfg.apiBaseUrl,
         token: cfg.token,
-        ticketId,
-        messageIds: chunk,
+        ticket_id: ticketId,
+        message_ids: chunk,
       })
     }
 
@@ -657,9 +657,9 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
       const bodyToSend = messageText
       const cfg = await ensureConfig()
       await invoke("send_chat_message", {
-        baseUrl: cfg.apiBaseUrl,
+        base_url: cfg.apiBaseUrl,
         token: cfg.token,
-        ticketId,
+        ticket_id: ticketId,
         body: bodyToSend,
         attachments: attachmentsToSend.length > 0 ? attachmentsToSend : undefined,
       })
@@ -692,7 +692,7 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
   const handleMinimize = async () => {
     setIsMinimized(true)
     try {
-      await invoke("set_chat_minimized", { ticketId, minimized: true })
+      await invoke("set_chat_minimized", { ticket_id: ticketId, minimized: true })
     } catch (err) {
       console.error("Erro ao minimizar janela:", err)
     }
@@ -707,14 +707,14 @@ export function ChatWidget({ ticketId, ticketRef }: ChatWidgetProps) {
 
     setIsMinimized(false)
     try {
-      await invoke("set_chat_minimized", { ticketId, minimized: false })
+      await invoke("set_chat_minimized", { ticket_id: ticketId, minimized: false })
     } catch (err) {
       console.error("Erro ao expandir janela:", err)
     }
   }
 
   const handleClose = () => {
-    invoke("close_chat_window", { ticketId })
+    invoke("close_chat_window", { ticket_id: ticketId })
   }
 
   const handleKeyDown = (e: React.KeyboardEvent) => {
diff --git a/apps/desktop/src/main.tsx b/apps/desktop/src/main.tsx
index fe95677..b8b2df0 100644
--- a/apps/desktop/src/main.tsx
+++ b/apps/desktop/src/main.tsx
@@ -1101,9 +1101,9 @@ const resolvedAppUrl = useMemo(() => {
         // Abre/minimiza chat quando aparecem novas não lidas
         if (hasSessions && totalUnread > prevUnread) {
           const session = payload.sessions[0]
-          invoke("open_chat_window", { ticketId: session.ticketId, ticketRef: session.ticketRef }).catch(console.error)
+          invoke("open_chat_window", { ticket_id: session.ticketId, ticket_ref: session.ticketRef }).catch(console.error)
           // Minimiza para não ser intrusivo
-          invoke("set_chat_minimized", { ticketId: session.ticketId, minimized: true }).catch(console.error)
+          invoke("set_chat_minimized", { ticket_id: session.ticketId, minimized: true }).catch(console.error)
         }
 
         prevUnread = totalUnread