openai/gpt-chat-latest → A (20:1)

Commit A affects the project broadly by standardizing formatting across the workspace, pinning rustfmt and clippy in the toolchain to improve reproducibility, adding editor configuration for rust-analyzer, and cleaning up a duplicate CSS rule. Although most code changes are mechanical formatting, it improves developer workflow and consistency across many files. Commit B only removes a single unused test function that produced a warning, which is a much smaller maintenance change.