fix(ui): 修复中文输入法回车误发送消息问题

添加 IME composition 状态检测，在输入法组合期间阻止回车发送消息

packages/ui/src/components/ChatInput.tsx

@@ -69,6 +69,7 @@ export function ChatInput({
   const [selectedCommandIndex, setSelectedCommandIndex] = useState(0);
   const [showSystemCommandMenu, setShowSystemCommandMenu] = useState(false);
   const [selectedSystemCommandIndex, setSelectedSystemCommandIndex] = useState(0);
+  const [isComposing, setIsComposing] = useState(false); // IME 输入法组合状态
   const textareaRef = useRef<HTMLTextAreaElement>(null);
 
   // 命令系统
@@ -327,12 +328,22 @@ export function ChatInput({
     }
 
     // Enter 发送，Shift+Enter 换行
-    if (e.key === 'Enter' && !e.shiftKey) {
+    // 注意：IME 组合期间不发送（中文输入法按回车确认拼音）
+    if (e.key === 'Enter' && !e.shiftKey && !isComposing) {
       e.preventDefault();
       handleSubmit();
     }
   };
 
+  // IME 输入法组合事件处理
+  const handleCompositionStart = () => {
+    setIsComposing(true);
+  };
+
+  const handleCompositionEnd = () => {
+    setIsComposing(false);
+  };
+
   return (
     <div
       className={clsx(
@@ -464,6 +475,8 @@ export function ChatInput({
                 value={input}
                 onChange={handleInputChange}
                 onKeyDown={handleKeyDown}
+                onCompositionStart={handleCompositionStart}
+                onCompositionEnd={handleCompositionEnd}
                 placeholder={
                   responsive
                     ? 'Ask anything...'