- Remove unused audio base64 reference and error message in VoiceSelector
- Rename CSS class from 'result-banner' to 'result-inline' and update button styling
- Pass validationError prop from GenerateStep to TimelinePanel
- Add validation error display in TimelinePanel with error state styling
- Update conditional rendering to show either validation error or duration diff
- Add CloseCircleOutlined icon for error status display
sion123
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