~x-ai/grok-latest → A (2:1)

A adds a focused correctness test that the rank-centrality path recovers true order from a minimal spanning-tree vote graph with perfect strength ratios—direct, lasting coverage of core ranking behavior. B is mostly a mechanical split of forum.rs into modules plus an unrelated macOS sample-fixture helper; it reorganizes existing UI code without fixing bugs or changing product semantics, so outweighing it by line count would reward churn over substance.