Implement unit tests for all core functionality

[thatvideoshopguy]

Ensure that all core functionality is covered by unit tests to maintain a high standard of code quality and reliability.

Proposed Feature:

• Identify the core features and components of the application.
• Write comprehensive unit tests for each core feature to validate correct functionality and handle edge cases.

Benefits:

By implementing unit tests for all core functionality, the application's stability and reliability will be improved, leading to a better user experience and easier maintenance.