ConsoleModal backdrop: aria-hidden removed, aria-label="Close terminal" added.
DeleteCascadeConfirmDialog backdrop: aria-hidden removed, aria-label="Dismiss dialog" added.
cursor-pointer also added to both for consistent pointer affordance.
Matches the same fix applied to KeyboardShortcutsDialog (PR #299) and
ConfirmDialog (PR #398) for WCAG 2.4.6 compliance.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>