~anthropic/claude-sonnet-latest → A (8:1)

Side A is a genuine workspace-wide rustfmt normalization plus real config fixes: pinning rustfmt/clippy components in rust-toolchain.toml, adding .vscode settings for rust-analyzer, and fixing a broken duplicate CSS selector in sorter.css that had merged unrelated rules. Side B merely deletes a single dead/unused test function (which wasn't even annotated with #[test] and thus never ran), a trivial one-line cleanup with negligible lasting value compared to A's tooling and formatting consistency improvements.