openai/gpt-chat-latest → A (3:2)

Side A changes the ranking color logic from list-position-based to score-based min–max normalization within each group, introducing a dedicated `score_gradient_t` helper, updating rendering to use score ranges, and adding focused tests for normalization behavior and edge cases like tied scores. Side B fixes a practical import issue by skipping stickied/pinned Reddit posts with a helper and regression test, but its impact is narrower than A's broader improvement to core ranking visualization behavior.