~anthropic/claude-sonnet-latest → B (65:35)

Side B adds substantive, tested functionality: a pair-selection algorithm (bridge/within component prioritization in pair.rs), a real vote-compare UI with edge history morphing, ItemId normalization fixes for storage/import correctness, and new integration/e2e tests plus refactored mock-reddit test support. Side A mostly removes dead demo-counter code (fine cleanup) and adds a settlement worker/caching layer for ranking, which is useful but narrower and less validated by new tests than B's changes.