openai/gpt-chat-latest → A (3:2)

Side A adds a concrete user-facing capability by making pinned child-group icons submit the existing set_garden_pin clear flow, wiring the required navigation path through rendering, updating styles for the new button state, and adding an end-to-end browser test covering unpinning from the ranked list and its effects. Side B improves visual encoding by changing row coloring from list position to score-based min–max normalization with unit tests, but it is primarily a presentation refinement rather than a functional capability or bug fix.