hermes - 💡(How to fix) Fix Desktop app: Send button doesn't switch from voice button when typing Chinese (IME composition)

Bug Description

When typing Chinese using an IME (Input Method Editor) on the Windows desktop app, the voice button doesn't switch to the send button until the text is committed (e.g., by pressing space). This creates a poor user experience for CJK input users.

Steps to Reproduce

1. Open Hermes desktop app on Windows
2. Focus on the composer input
3. Switch to a Chinese IME (e.g., Microsoft Pinyin)
4. Start typing pinyin (e.g., "nihao")
5. Observe that the voice button remains as-is during composition
6. Press space to commit the Chinese characters
7. The button only changes to send after pressing delete or space

Expected Behavior

The voice button should switch to the send button as soon as the user starts typing, regardless of whether they're using an IME or not.

Root Cause

The hasComposerPayload variable in apps/desktop/src/app/chat/composer/index.tsx only checks the draft state:

const hasComposerPayload = draft.trim().length > 0 || attachments.length > 0

However, during IME composition, the handleEditorInput function returns early and doesn't update draft:

const handleEditorInput = (event: FormEvent<HTMLDivElement>) => {
    if (composingRef.current) {
      return  // Skip during IME composition
    }
    // ...
}

Solution

Modify hasComposerPayload to also check if the editor has content directly:

const hasComposerPayload = draft.trim().length > 0 || 
                          attachments.length > 0 || 
                          (editorRef.current && composerPlainText(editorRef.current).trim().length > 0)

Additionally, trigger re-renders when IME composition state changes:

onCompositionStart={() => {
  composingRef.current = true
  setComposingVersion(v => v + 1)  // Force re-render
}}
onCompositionEnd={() => {
  composingRef.current = false
  setComposingVersion(v => v + 1)  // Force re-render
}}

Environment

• OS: Windows 10
• Hermes Version: v0.15.1 (2026.5.29)
• Input Method: Microsoft Pinyin (or any CJK IME)