Fix: Prevent Enter key from submitting during IME composition (#12252)

Co-authored-by: openhands <openhands@all-hands.dev>

frontend/src/components/features/conversation-panel/conversation-card/conversation-card-title.tsx

@@ -30,6 +30,10 @@ export function ConversationCardTitle({
           onSave(trimmed);
         }}
         onKeyUp={(event: React.KeyboardEvent<HTMLInputElement>) => {
+          // Ignore Enter key during IME composition (e.g., Chinese, Japanese, Korean input)
+          if (event.nativeEvent.isComposing) {
+            return;
+          }
           if (event.key === "Enter") {
             event.currentTarget.blur();
           }

frontend/src/components/features/conversation/conversation-name.tsx

@@ -91,6 +91,10 @@ export function ConversationName() {
   };
 
   const handleKeyUp = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    // Ignore Enter key during IME composition (e.g., Chinese, Japanese, Korean input)
+    if (event.nativeEvent.isComposing) {
+      return;
+    }
     if (event.key === "Enter") {
       event.currentTarget.blur();
     }

frontend/src/hooks/chat/use-chat-input-events.ts

@@ -68,6 +68,12 @@ export const useChatInputEvents = (
         return;
       }
 
+      // Ignore Enter key during IME composition (e.g., Chinese, Japanese, Korean input)
+      // When using IME, Enter is used to confirm the composition, not to submit
+      if (e.nativeEvent.isComposing) {
+        return;
+      }
+
       if (checkIsContentEmpty()) {
         e.preventDefault();
         increaseHeightForEmptyContent();