- Create /bags/:id detail page with coffee, roaster, map, and bag info cards
- Extract shared template macros into detail_cards.html (coffee_card, roaster_card, map_with_legend, share_button)
- Extract build_coffee_info() and build_roaster_info() view model helpers
- Refactor brew.html and cup.html to use shared macros
- Make bag cards on homepage clickable, linking to detail page
- Add Close Bag and Delete actions on bag detail page
- Unify homepage card styling (bg-surface, hover:border-accent/40)
- Update CLAUDE.md with detail page patterns
