feat: radar category pages, post detail page, panel CMS wiring + webp uploads
- Add /radar/:category dynamic detail pages (hero, special banner, grids, pagination)
- Add /posts/:id article page: cover mask, magic-text scroll reveal, charts,
comments, floating related sidebar, logged-out membership gate
- Panel: radar_pages table/routes + admin UI, grouped right sidebar, webp
image conversion on upload (sharp)
- Mobile fixes: overflow-x guards, left-side accordion menu, globe/podcast/hero
- Header: flag language toggle
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
07239bd811