The s3DownloadedFile was being set immediately when download started,
causing the "Restore" button to appear while still downloading and
the download message to not hide properly.
- Remove immediate setting of s3DownloadedFile in downloadFromS3()
- Set s3DownloadedFile only in handleS3DownloadFinished() event handler
- Add broadcastWith() to S3DownloadFinished to send downloadPath
- Store downloadPath as public property for broadcasting
- Now download message hides and restore button shows only when complete
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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