feat: tour page photos-first layout, mobile booking bar; board 1 fixes

Tour page (boards 2 and 3):
- Replace the blurred 'Welcome to {city}' hero with a breadcrumb and a photo
  gallery (1 large + 2, 'All N photos' opens the lightbox); the H1 title,
  rating with review count and facts follow; booking card stays sticky
- Phones/tablets: swipeable photos, name before price, 2x2 facts, and a
  fixed bottom bar with price + Check availability (vc-tour.css)

Board 1:
- Hide Viator internal tags ('Agent Low Quality Product'...) from the tour
  category, listing filter and activities section (VC_Tags, tested)
- Listings: run the query filter late and set posts_per_archive_page so
  pages show 12 tours as the count says
- Footer columns without a menu show default links (quick links, structure
  cities, contact/about/faq) instead of empty headings

Plugin 1.9.5, theme 1.0.13.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

viator-collector/templates/listing.php

@@ -36,7 +36,7 @@ if ( is_wp_error( $vc_action ) || ! $vc_action ) {
 $vc_destinations = get_terms( array( 'taxonomy' => 'viator_destination', 'hide_empty' => true, 'number' => 20, 'orderby' => 'count', 'order' => 'DESC' ) );
 $vc_categories   = get_terms( array( 'taxonomy' => 'viator_tag', 'hide_empty' => true, 'number' => 20, 'orderby' => 'count', 'order' => 'DESC' ) );
 $vc_destinations = is_wp_error( $vc_destinations ) ? array() : $vc_destinations;
-$vc_categories   = is_wp_error( $vc_categories ) ? array() : $vc_categories;
+$vc_categories   = is_wp_error( $vc_categories ) ? array() : VC_Tags::public_terms( $vc_categories );
 
 $vc_total = (int) $vc_query->found_posts;
 $vc_per   = 12;