~anthropic/claude-sonnet-latest → B (3:1)

Side B fixes an actual dead test (missing #[test] attribute so it silently never ran), removes clippy lints across multiple files (idiomatic Option handling, redundant deref, unused var, format-string improvements), and adds a documented dead_code allowance for shared test helpers — all real correctness/maintainability improvements. Side A is purely CSS/markup tweaks (removing a wrapper section, styling rank numbers) that are cosmetic and localized, with no functional or structural benefit beyond visual polish.