openai/gpt-chat-latest → A (4:1)

Side A adds a substantial new offline tooling capability by introducing a reusable server-side `offline` module plus a `sorterc` CLI that compiles `.sorter` files, replays JSONL event logs, reports malformed ingests, and includes tests and documentation. Side B fixes important OAuth test infrastructure issues (query parsing, request body handling, redirects, null handling, and Playwright selectors), but those changes are confined to test mocks and restore existing E2E behavior rather than adding broadly reusable project functionality.