- add latest blog posts section to homepage displaying 3 most recent
- modernize BlogCard component with rounded corners and clean styling
- update featured post card on blog index with contemporary design
- remove industrial aesthetic (uppercase, mono, accent strips, overlays)
- add design.json documenting design system evolution
- change to normal case titles, hashtag tags, simplified metadata
- replace technical labels with clean badges
- add rounded-full buttons and rounded-lg/xl cards
