Add comprehensive layout and styling controls including header layout options (standard, centered, left), content width settings (contained, wide, full), and card shadow levels. Update all theme presets with these new settings. Replace placeholder images with real Unsplash product and category images for more realistic previews. Add announcement bar and sticky header toggle options for enhanced header customization.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add PreviewData module that provides mock data for theme preview:
- 12 diverse mock products with realistic details and placeholder images
- 3 cart items with variants and quantities
- 6 customer testimonials with ratings
- 5 product categories with counts
- Smart fallback: uses real data when available, mock otherwise
All data designed to showcase theme customization options.
Includes 19 comprehensive tests.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
