Chat UI: Enter key sends message during CJK IME composition

[atoship-dev]

Bug Description

When using Chinese (CJK) Input Method Editor (IME) in the web chat UI, pressing Enter to confirm/select a character from the candidate list immediately sends the message instead of just confirming the character selection.

Steps to Reproduce

1. Open the OpenFang dashboard chat (http://127.0.0.1:4200)
2. Switch to a Chinese IME (e.g., Pinyin)
3. Type pinyin characters (e.g., "ni hao")
4. When the candidate list appears, press Enter to select a character
5. Expected: The selected character is inserted into the input field
6. Actual: The incomplete/partial text is sent as a message immediately

Expected Behavior

Pressing Enter during IME composition should only confirm the character selection. The message should only be sent when Enter is pressed after composition ends (i.e., when isComposing is false).

Suggested Fix

Add an isComposing check to the keydown event handler:

textarea.addEventListener('keydown', (e) => {
  if (e.key === 'Enter' && !e.isComposing) {
    sendMessage();
  }
});

Environment

• OS: macOS (Apple Silicon)
• OpenFang version: 0.3.29
• IME: macOS built-in Chinese Pinyin

References

• Same issue in Open WebUI: issue: macOS Chinese IME: Pressing Enter while composing text sends the message immediately (missing composition state check) open-webui/open-webui#16608
• Same issue in elizaOS: Chat Input Sends Multiple Messages When Using IME elizaOS/eliza#2272

[jaberjaber23]

The main chat textarea already has the isComposing check implemented at index_body.html line 739. The Enter handler checks !.isComposing before sending, so CJK IME composition is properly handled. If you're still experiencing this, it may be a browser caching issue. Try a hard refresh (Ctrl+Shift+R).