Add Accessibility Compliance and Support

[avrabe]

Epic: Accessibility and Compliance

Priority: Low
Story Points: 6
Phase: 4 (Polish & Optimization)

Problem

The comprehensive UI features and dialog systems need accessibility compliance for users with disabilities.

Solution

Add comprehensive accessibility support including screen reader compatibility, keyboard navigation, and WCAG compliance.

Implementation Details

Accessibility targets:

• Dialog system with focus management
• Header icon interactions with keyboard support
• Canvas-based diagram navigation with screen reader support
• MCP streaming notifications with audio cues
• WASM component interfaces with accessible descriptions

Tasks

• Add ARIA labels and descriptions to all interactive elements
• Implement comprehensive keyboard navigation
• Add screen reader support for canvas-based diagrams
• Enable high contrast and reduced motion preferences
• Add audio cues for important notifications

Accessibility Features

// ARIA support
<DialogComponent
    role="dialog"
    aria-labelledby="dialog-title"
    aria-describedby="dialog-description"
    aria-modal="true"
>
    <h2 id="dialog-title">Component Validation</h2>
    <p id="dialog-description">Review validation results</p>
</DialogComponent>

// Keyboard navigation
<HeaderIcon
    tabIndex={0}
    role="button"
    aria-label="Open component manager"
    onKeyDown={(e) => {
        if (e.key === 'Enter' || e.key === ' ') {
            handleIconClick();
        }
    }}
/>

// Screen reader canvas descriptions
<CanvasRenderer
    aria-label="Diagram canvas"
    role="img"
    aria-describedby="canvas-description"
>
    <div id="canvas-description" className="sr-only">
        Diagram with {componentCount} components and {edgeCount} connections
    </div>
</CanvasRenderer>

// Audio notifications
<NotificationManager
    enableAudio={userPreferences.audioNotifications}
    respectsReducedMotion={userPreferences.reducedMotion}
    highContrast={userPreferences.highContrast}
/>

WCAG Compliance Checklist

• Perceivable: Text alternatives, captions, adaptable content
• Operable: Keyboard accessible, no seizures, navigable
• Understandable: Readable, predictable, input assistance
• Robust: Compatible with assistive technologies

Acceptance Criteria

• All interactive elements are keyboard accessible
• Screen readers can navigate and understand the interface
• High contrast mode works with all visual elements
• Reduced motion preferences are respected
• WCAG 2.1 AA compliance is achieved

Technical Notes

• Use semantic HTML elements where possible
• Implement focus management for dialog workflows
• Add live regions for dynamic content updates
• Test with multiple screen readers (NVDA, JAWS, VoiceOver)
• Support browser zoom up to 200%

Files:

• All UI components and dialog systems
• Canvas renderer for accessible diagram descriptions
• Notification and audio feedback systems