WCAG 1.3.1 / 4.1.3: the error div that appears after a failed workspace
deploy or blank-workspace create had no ARIA live region, so screen
readers never announced it. Adding role="alert" makes the message an
implicit aria-live="assertive" region so assistive technology surfaces
the error immediately without requiring the user to navigate to it.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>