- Add a unified Schedule section across all four tour categories:
- Local: choose a fixed session (date+time) or flexible/by-appointment
- National/International: required departure + optional return trip dates
- Destruction: existing competition window, now with end>=start validation
- Reuse start-date/end-date tags for every category (parser already supported them)
- Fix datetime handling: dedicated toDateInput/inputToSecs helpers so date and
datetime-local inputs round-trip correctly (previous mix of toLocalInput +
type="date" was inconsistent)
- Consistent, logical mandatory-field validation with clear required markers
- Redesign the header into an immersive, category-tinted, grunge-striped banner
and rebuild the category selector as elegant glowing cards
- New calendar utilities (.ics + Google Calendar) and AddToCalendar component
- TourDetailPage is now fully category-aware (badge, guide label, duration,
SEO title) with a Schedule card + Add to Calendar for attendees
- TourCard shows the schedule for all categories (time for local sessions)
- Update NIP.md to document start-date/end-date across categories
Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>
