debug: add logging to track message state during image generation

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

components/chat.tsx

@@ -308,7 +308,15 @@ export function Chat({
           }
           
           setMessages((prevMessages) => {
+            // 🔍 调试日志：检查当前消息列表
+            console.log("[Chat] setMessages 前的消息列表:", prevMessages.map(m => ({
+              id: m.id?.substring(0, 8),
+              role: m.role,
+              hasContent: m.parts?.length > 0
+            })));
+            
             if (prevMessages.some(m => m.id === messageData.id)) {
+              console.log("[Chat] 消息已存在，跳过添加");
               return prevMessages;
             }
             
@@ -323,7 +331,14 @@ export function Chat({
               attachments: [],
             };
             
-            return [...prevMessages, newMessage];
+            const updatedMessages = [...prevMessages, newMessage];
+            console.log("[Chat] setMessages 后的消息列表:", updatedMessages.map(m => ({
+              id: m.id?.substring(0, 8),
+              role: m.role,
+              hasContent: m.parts?.length > 0
+            })));
+            
+            return updatedMessages;
           });
         } catch (e) {
           console.error("[Chat] Failed to parse data-appendMessage:", e);