fix: enforce minimum 360px height for all tracks using Math.max

- Track component now uses Math.max to ensure track.height is at least MIN_TRACK_HEIGHT
- TrackList component also uses Math.max for consistent enforcement
- Fixes issue where tracks with old height values (340px, 357px) were smaller
- All tracks now guaranteed to be exactly 360px regardless of stored height

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/tracks/Track.tsx

@@ -641,7 +641,7 @@ export function Track({
     }
   };
 
-  const trackHeight = track.collapsed ? COLLAPSED_TRACK_HEIGHT : track.height;
+  const trackHeight = track.collapsed ? COLLAPSED_TRACK_HEIGHT : Math.max(track.height || MIN_TRACK_HEIGHT, MIN_TRACK_HEIGHT);
 
   // Track height resize handlers
   const handleResizeStart = React.useCallback(