Extract a reusable VirtualScrollManager base class from TimelineManager
to enable code reuse for virtual scrolling behavior.
Changes:
- Add VirtualScrollManager base class with common scrolling logic
- Add ScrollSegment base class for month/segment abstraction
- Migrate TimelineMonth to extend ScrollSegment
- Migrate TimelineManager to extend VirtualScrollManager
- Move intersection/layout/load logic from internal/ to base classes
- Update components to work with new architecture
- Delete timeline-manager/internal/{intersection,layout,load}-support.ts
No functional changes - pure refactoring.
midzelis