Fix (race): mutex chatbody

tools.go

@@ -1215,11 +1215,11 @@ func isCommandAllowed(command string, args ...string) bool {
 }
 
 func summarizeChat(args map[string]string) []byte {
-	if len(chatBody.Messages) == 0 {
+	if chatBody.GetMessageCount() == 0 {
 		return []byte("No chat history to summarize.")
 	}
 	// Format chat history for the agent
-	chatText := chatToText(chatBody.Messages, true) // include system and tool messages
+	chatText := chatToText(chatBody.GetMessages(), true) // include system and tool messages
 	return []byte(chatText)
 }