fix:修正对话附加bug，删除无用id

src/App.js

@@ -15,7 +15,6 @@ import { requestBotReply } from "./dsAPI";
 export default function App() {
   const [messages, setMessages] = useState([
     {
-      id: 0,
       role: "assistant",
       content: "你好，有什么可以帮你？",
     },
@@ -26,7 +25,6 @@ export default function App() {
   const [isSending, setIsSending] = useState(false);
   const [isBotTyping, setIsBotTyping] = useState(false);
 
-  const msgIdRef = useRef(1);
   const bottomRef = useRef(null);
 
   useEffect(() => {
@@ -38,12 +36,12 @@ export default function App() {
     if (!text || isSending) return;
 
     const userMessage = {
-      id: msgIdRef.current++,
       role: "user",
       content: text,
     };
 
-    setMessages((prev) => [...prev, userMessage]);
+    const nextMessages = [...messages, userMessage];
+    setMessages(nextMessages);
     setInputText("");
     setIsSending(true);
     setIsBotTyping(true);
@@ -51,8 +49,7 @@ export default function App() {
     // 给模型的上下文
     const historyForModel = [
       { role: "system", content: "你是一个简洁的助手，用中文回答。" },
-      ...messages.map(({ role, content }) => ({ role, content })),
+      ...nextMessages.map(({ role, content }) => ({ role, content })),
-      { role: "user", content: text },
     ];
 
     let reply = "";
@@ -63,7 +60,6 @@ export default function App() {
     }
 
     const botMessage = {
-      id: msgIdRef.current++,
       role: "assistant",
       content: reply,
     };
@@ -81,11 +77,6 @@ export default function App() {
   }
 
   return (
-    // min-h-screen 最小高度 = 整个屏幕高度 
-    // bg-gradient-to-b 背景是 从上到下的渐变
-    // from-background 渐变起点颜色
-    // to-content2/50 渐变终点颜色 /50 = 50% 透明度
-    // p-4 控制四周内距
     <div className="min-h-screen bg-gradient-to-b from-background to-content2/50 p-4">
       <div className="mx-auto max-w-3xl">
         <Card className="shadow-xl">
@@ -109,7 +100,6 @@ export default function App() {
                   const isUser = m.role === "user";
                   return (
                     <div
-                      key={m.id}
                       className={`flex ${isUser ? "justify-end" : "justify-start"}`}
                     >
                       <div