openai/gpt-chat-latest → B (3:2)

Commit B fixes a runtime bug by defining GITHUB_API_BASE_URL with a sensible default, preventing a NameError during the GitHub OAuth callback and restoring functionality. Commit A improves the test infrastructure by replacing manually enumerated Kaocha suites with automatic test discovery, reducing maintenance and ensuring new tests are picked up automatically. While A is a useful developer-experience improvement, B has a more direct impact on application correctness and user-facing behavior.