debug: 添加更多消息追踪日志

Co-authored-by: Cursor <cursoragent@cursor.com>

components/chat.tsx

@@ -294,7 +294,13 @@ export function Chat({
           completeGeneration();
           
           setMessages((prevMessages) => {
+            console.log("[Chat] 📋 setMessages 调用前:", prevMessages.map(m => ({
+              id: m.id?.substring(0, 8),
+              role: m.role
+            })));
+            
             if (prevMessages.some(m => m.id === messageData.id)) {
+              console.log("[Chat] ⚠️ 消息已存在，跳过");
               return prevMessages;
             }
             
@@ -309,7 +315,12 @@ export function Chat({
               attachments: [],
             };
             
-            return [...prevMessages, newMessage];
+            const newMessages = [...prevMessages, newMessage];
+            console.log("[Chat] 📋 setMessages 调用后:", newMessages.map(m => ({
+              id: m.id?.substring(0, 8),
+              role: m.role
+            })));
+            return newMessages;
           });
         } catch (e) {
           console.error("[Chat] Failed to parse data-appendMessage:", e);