Audit and fix HTML accessibility issues including ARIA labels, keyboard navigation, focus management, color contrast, and form errors. Use when adding interactive controls, forms, dialogs, or reviewing WCAG compliance.

审计并修复 HTML 可访问性问题，包括 ARIA 标签、键盘导航、焦点管理、颜色对比度和表单错误。适用于添加交互控件、表单、对话框或审查 WCAG 合规性时使用。