openai/gpt-chat-latest → A (3:1)

Commit A makes small but user-visible changes: it removes redundant UI elements from the vote page and fixes the vote slider gradient logic so the highlighted side matches the selected winner. Although labeled as 'nits', it changes application behavior and presentation. Commit B is dominated by workspace-wide rustfmt reformatting with a few tooling improvements (pinning rustfmt/clippy, adding VS Code settings, and a minor CSS cleanup). Those changes improve developer experience and consistency but have much less impact on the project's functionality.