Refine BFS Visualizer Code

I have developed a BFS visualization project based on the requirements provided by our instructor, and I used AI tools as allowed to assist with the implementation.

I will share both the assignment instructions and my code.

Could you please review it and check whether all requirements have been correctly implemented?

If there are any missing parts, issues, or areas that could be improved, I would appreciate your help in fixing or completing them.

Also, if needed, please refine the code to make it cleaner, more natural, and less AI-generated in style.