<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Streamlined internal event handling for block updates, removing previous notification mechanisms from several components.
- **Chores**
- Simplified and cleaned up internal logic related to block addition and deletion tracking.
No visible changes to the user interface or end-user features.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->