Title: Implement WCAG 2.1 AA Accessibility Compliance

Description:
Ensure our application is accessible to users with disabilities by implementing proper ARIA labels, keyboard navigation, and screen reader support.

Acceptance Criteria:

• Conduct accessibility audit with axe-core
• Implement proper ARIA labels and roles
• Add keyboard navigation support
• Ensure proper color contrast ratios
• Add screen reader friendly content
• Test with actual screen reader software

Technical Details:

• Use existing shadcn/ui accessibility features
• Add axe-core testing to jest setup
• Follow WAI-ARIA guidelines

Files to Modify:

• All components in frontend/src/components/
• Add: frontend/src/utils/accessibility.ts

Tags: enhancement accessibility user-experience compliance
Priority: Medium
Estimated Effort: 4-7 days