fix: prevent Enter key submit during IME composition

Made-with: Cursor

Author: wanming

frontend/components/chat-panel.tsx

@@ -118,12 +118,11 @@ export function ChatPanel({
   }, [input, disabled, onSendMessage])
 
   const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
-    // Enter or Cmd+Enter to send
+    if (e.nativeEvent.isComposing) return
     if (e.key === "Enter" && !e.shiftKey) {
       e.preventDefault()
       handleSubmit()
     }
-    // Cmd/Ctrl+Enter to send (alternative)
     if (e.key === "Enter" && (e.metaKey || e.ctrlKey)) {
       e.preventDefault()
       handleSubmit()

frontend/components/chat/message-clarification.tsx

@@ -81,7 +81,7 @@ export function MessageClarification({
                   value={inputValue}
                   onChange={(e) => setInputValue(e.target.value)}
                   onKeyDown={(e) => {
-                    if (e.key === "Enter") {
+                    if (e.key === "Enter" && !e.nativeEvent.isComposing) {
                       handleSubmit()
                     }
                   }}