Added migration logic to useMultiTrack hook: - When loading tracks from localStorage, check if height < DEFAULT_TRACK_HEIGHT - Automatically upgrade old heights (120px, 150px) to new default (180px) - Preserves custom heights that are already >= 180px This fixes the inline style issue where existing tracks had style="height: 120px" that was cutting off the level meter. After this update, refreshing the page will automatically upgrade all existing tracks to the new height without losing any data. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>