f7f7e0db8c
- Create AccessibilityContext for global focus management and expanded state - Add roving tabindex to sidebar with Up/Down/Enter/Home/End navigation - Focus management: after login, after view change, after item expansion - Global Escape closes expanded items across all views - Add scope='col' to SummaryView table headers - Add focus-after-expand to ConsultationsView - Update ARIA roles: role='menu', role='menuitem', aria-current