openai/gpt-chat-latest → A (4:1)

Side A repairs multiple concrete failures in the OAuth test infrastructure: it fixes query parsing (`str/split` regex), reads POST bodies from `getRequestBody`, guards against nil tokens and states, corrects redirect response handling, wraps mock handlers to avoid crashes, and updates Playwright helpers to read the right selectors and wait reliably. Side B is a useful but narrowly scoped fix that defines `GITHUB_API_BASE_URL` with a default to eliminate a callback `NameError`; its impact is limited compared with the broader restoration of end-to-end authentication testing in Side A.