openai/gpt-chat-latest → A (4:1)

Side A delivers durable security and correctness improvements: voting now fails closed instead of silently falling back to an anonymous actor, auth cookies gain conditional Secure handling, open-redirect sanitization is tightened and tested, mock OAuth is gated behind an explicit environment flag, and the durable dependency is pinned by immutable revision. Side B adds substantial Reddit import infrastructure with background fetching, OAuth support, and parsing, but it is largely new feature code with a TODO trail, whereas Side A fixes authentication and reproducibility issues that have broader long-term impact on project integrity.