Kacper Wrobel enhanced the SuperTeddyBears/FlowDraw repository by implementing Entity-Relationship diagram support, focusing on both visual and data-model improvements. He introduced new SVG elements and integrated them into the sidebar, enabling users to visualize ER diagrams directly within the application. Using React and Konva, he refactored the rendering logic to a dedicated ConnectionEndpoint component, which improved maintainability and scalability. Kacper also updated the data model to accurately store and retrieve connection types, ensuring visual fidelity and data integrity. His work leveraged JavaScript and TypeScript, laying a solid foundation for future extensibility in diagramming features and connection handling.