Address code review feedback - fix duplicate type export and onSend callback

Co-authored-by: huangyiirene <7665279+huangyiirene@users.noreply.github.com>

Author: Copilot

packages/components/src/renderers/complex/chatbot.tsx

@@ -26,11 +26,12 @@ ComponentRegistry.register('chatbot',
         timestamp: schema.showTimestamp ? new Date().toLocaleTimeString() : undefined,
       };
 
-      setMessages((prev) => [...prev, userMessage]);
+      const updatedMessages = [...messages, userMessage];
+      setMessages(updatedMessages);
 
-      // If onSend callback is provided in schema, call it
+      // If onSend callback is provided in schema, call it with updated messages
       if (schema.onSend) {
-        schema.onSend(content, messages);
+        schema.onSend(content, updatedMessages);
       }
 
       // Auto-response feature for demo purposes

packages/components/src/ui/chatbot.tsx

@@ -238,4 +238,4 @@ const TypingIndicator = React.forwardRef<HTMLDivElement, TypingIndicatorProps>(
 TypingIndicator.displayName = "TypingIndicator"
 
 export { Chatbot, TypingIndicator }
-export type { ChatMessage, ChatMessage as ChatbotMessage }
+export type { ChatMessage }