This commit modifies the `.gitignore` file to exclude Python library directories while ensuring the viewer-frontend's `lib` directory is not ignored. It also updates the `package.json` to activate the virtual environment during backend tests, improving the testing process. Additionally, the CI workflow is enhanced to prevent duplicate runs for branches with open pull requests. Various components in the viewer frontend are updated to ensure consistent naming conventions and improve type safety. These changes contribute to a cleaner codebase and a more efficient development workflow.
