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

Side B is a self-contained, verifiable improvement: it fixes a real correctness issue (duplicate '#entity-section' ids breaking Idiomorph morphs when multiple entity sections coexist, e.g. on the vote-compare page) by switching to per-item data-attribute selectors, and it removes ~35 lines of duplicated markup in vote.rs by reusing the shared entity_section renderer. Side A deletes the old engine.rs and rewires registry.rs to call new `graph`/`parse` modules and an external test file, but those new modules and tests aren't shown in the diff, so the actual replacement logic (and whether it preserves correctness/tests) can't be verified from the patch itself.