- Add dynamic sitemap.xml generation for all pages
- Add robots.txt for search engine crawl directives
- Add LocalBusiness JSON-LD schema for local SEO
- Add BreadcrumbList schema for navigation breadcrumbs
- Add canonical URLs to all product pages
- Add Twitter Cards metadata
- Add Google Analytics 4 integration component
- Create llm.txt with all product data for AI optimization
- Create reusable UI components (Button, Card, Badge)
- Update company address to full Thai address
- Update .env.example with GA4 placeholder
- Fixed truncated Header.tsx with missing closing tags
- Updated navigation to include all 38 products in 7 categories
- Added 2-column dropdown grid layout for desktop
- Added nested sub-categories for mobile menu
- Header: white background with dark text for navigation
- Footer: light gray background with dark text
- All text colors updated for readability
- No white text on white background issues
