Add enterprise appliance experience Phase 1 foundation

tests/accessibility/phase1-checklist.md

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+# Phase 1 WCAG 2.2 AA Checklist
+
+Apply to browser setup, console-equivalent instructions, landing readiness, appliance and health
+pages. Automated checks supplement but do not replace manual review.
+
+- [ ] Keyboard completes valid setup, validation recovery and interruption recovery.
+- [ ] Focus order follows the visible journey and remains visible at all times.
+- [ ] Validation errors are associated with fields and focus moves to the first invalid field.
+- [ ] Progress, degraded state, failure and completion are announced without stealing focus.
+- [ ] Step, tier and tool selectors expose name, role, state and keyboard operation.
+- [ ] Confirmation identifies scope, disruption and recovery implications.
+- [ ] Status and severity never rely on colour alone.
+- [ ] Text and controls meet WCAG 2.2 AA contrast requirements.
+- [ ] Content reflows at 320 CSS pixels and remains usable at 200% zoom.
+- [ ] Motion respects reduced-motion preferences.
+- [ ] Page titles, headings, landmarks and labels identify purpose and context.
+- [ ] Error messages avoid raw codes as primary text and provide a safe next action.
+- [ ] Workstation and Server labels are consistent and understandable.
+- [ ] Restricted-network guidance is locally available.
+- [ ] Automated scan has no unresolved Level A or AA finding.
+- [ ] Representative screen-reader journey has no unresolved blocker.
+
+Record browser, operating system, assistive technology, viewport, product configuration, evidence
+links, reviewer and date for every completed run.