- Track container now has fixed height (240px default or track.height) - Waveform uses flex-1 to take remaining space - Automation and effects bars use flex-shrink-0 for fixed height - When bars expand, waveform shrinks instead of container growing - Matches DAW behavior where track height stays constant 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>