openai/gpt-5.3-chat → B (3:1)

Commit B meaningfully improves the project’s testing infrastructure by eliminating manual test enumeration and enabling automatic discovery of all test namespaces. This reduces maintenance overhead, prevents future omissions, and ensures CI and local runs stay consistent as new tests are added. Commit A is mostly a UI refactor and styling enhancement with limited functional impact, whereas B improves long-term reliability and developer workflow.