~anthropic/claude-sonnet-latest → A (6:4)

Side A fixes a real, user-facing bug (attribution text leaking into DSL body, silent fallback to entire item pool producing nonsensical pairs, dead swap button) and cleanly renames a route across code and tests, all verified by adjusted integration tests. Side B is a substantial internal refactor removing legacy projection code for an evidence/ledger system, which is reasonable cleanup but is narrower in scope (affects one internal admin/evidence UI) and mostly deletes now-unneeded fallback logic rather than fixing an active correctness bug affecting end users.