feat(brand-system): Implement comprehensive CHORUS brand system with typography and design tokens

This commit implements a complete brand system overhaul including:

TYPOGRAPHY SYSTEM:
- Add Exo font family (Thin, Light, Regular, ExtraLight) as primary brand font
- Implement SF Pro Display/Text hierarchy for UI components
- Create comprehensive Typography component with all brand variants
- Update all components to use new typography tokens

DESIGN TOKEN SYSTEM:
- Create complete design token system in theme/designTokens.ts
- Define Carbon Black (#1a1a1a), Walnut Brown (#8B4513), Brushed Aluminum (#A8A8A8) palette
- Implement CSS custom properties for consistent theming
- Update Ant Design theme integration

COMPONENT UPDATES:
- Enhance Hero section with Exo Thin typography and improved layout
- Update navigation with SF Pro font hierarchy
- Redesign Button component with new variants and accessibility
- Apply brand colors and typography across all showcase sections
- Improve Footer with consistent brand application

PERFORMANCE & ACCESSIBILITY:
- Self-host Exo fonts for optimal loading performance
- Implement proper font-display strategies
- Add comprehensive accessibility audit documentation
- Include responsive testing verification

DOCUMENTATION:
- Add brand system demo and implementation guides
- Include QA testing reports and accessibility audits
- Document design token usage and component patterns

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

healthcheck-simple.js

@@ -19,7 +19,7 @@ const TIMEOUT = 5000; // 5 seconds
 function checkHealth() {
     return new Promise((resolve) => {
         const options = {
-            hostname: 'localhost',
+            hostname: '127.0.0.1',  // Force IPv4 instead of localhost
             port: PORT,
             path: '/',
             method: 'HEAD',