openai/gpt-5.3-chat → B (9:1)

Commit A is a small cleanup: removing a few UI elements and tweaking CSS gradients. Commit B, while largely non-functional, applies workspace-wide formatting, fixes lint/tooling issues, pins toolchain components, adds editor configuration, and cleans up duplicated CSS. These changes significantly improve maintainability, consistency, and developer experience across the entire project, making it far more impactful overall.