## Problem
When using Input Method Editor (IME) for languages like Chinese or Japanese, pressing Enter key triggers two actions simultaneously:
1. Confirms the current IME input
2. Submits the message
This makes it impossible to properly input text using IME.
## Solution
Add IME composition state detection to prevent message submission during IME input:
1. Add `isComposing` state to track IME input status
2. Listen to `compositionstart` and `compositionend` events to update IME state
3. Add IME state check in `handleSend` function
## Files Changed
- `apps/stage-web/src/components/Layouts/InteractiveArea.vue`
- `apps/stage-web/src/components/Layouts/MobileInteractiveArea.vue`
## Testing Steps
1. Use Chinese/Japanese IME to input text
2. Press Enter key while IME candidate window is showing
3. Verify that text is correctly entered into the input field instead of triggering message submission
4. After IME input is complete, verify that pressing Enter key submits the message normally
## Additional Notes
- While mobile devices typically use virtual keyboards, we've added the same handling logic to maintain code consistency and prepare for potential desktop mode in the future
- This change does not affect normal message submission functionality
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Menci