<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Simplified and removed several internal AI block extension files and utility functions, streamlining the codebase and reducing unused features.
- Updated logic to access editor modes and controllers directly, removing reliance on DOM queries and certain abstractions.
- Reduced and restructured effect type declarations for improved clarity.
- **Bug Fixes**
- Improved type safety in the editor component by explicitly typing queried elements.
- **Chores**
- Removed obsolete exports and internal functions with no impact on user-facing functionality.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
