Add core data structures for Buildings and Rooms (v0.1.0)

Phase 1 implementation includes:
- Custom Post Type: Buildings with address, contact, and details meta
- Custom Post Type: Rooms with building relationship and gallery
- Custom Taxonomy: Room Types (hierarchical)
- Custom Taxonomy: Amenities (non-hierarchical with icons)
- Admin columns, filters, and status badges
- Gallery meta box with media library integration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/js/admin.js

@@ -91,9 +91,102 @@
 		}
 	}
 
+	/**
+	 * Initialize room gallery functionality.
+	 */
+	function initRoomGallery() {
+		var $container = $('#bnb-room-gallery');
+		var $addButton = $('#bnb-add-gallery-images');
+		var $input = $('#bnb_room_gallery');
+		var $imagesContainer = $container.find('.bnb-gallery-images');
+
+		if (!$addButton.length) {
+			return;
+		}
+
+		// Media frame for selecting images.
+		var mediaFrame;
+
+		// Add images button click.
+		$addButton.on('click', function(e) {
+			e.preventDefault();
+
+			// If frame exists, reopen it.
+			if (mediaFrame) {
+				mediaFrame.open();
+				return;
+			}
+
+			// Create media frame.
+			mediaFrame = wp.media({
+				title: wpBnbAdmin.i18n.selectImages,
+				button: {
+					text: wpBnbAdmin.i18n.addToGallery
+				},
+				multiple: true,
+				library: {
+					type: 'image'
+				}
+			});
+
+			// Handle selection.
+			mediaFrame.on('select', function() {
+				var selection = mediaFrame.state().get('selection');
+				selection.each(function(attachment) {
+					var data = attachment.toJSON();
+					var thumbnail = data.sizes.thumbnail ? data.sizes.thumbnail.url : data.url;
+
+					// Check if already in gallery.
+					if ($imagesContainer.find('[data-id="' + data.id + '"]').length) {
+						return;
+					}
+
+					// Add image to gallery.
+					var $image = $('<div class="bnb-gallery-image" data-id="' + data.id + '">' +
+						'<img src="' + thumbnail + '" alt="">' +
+						'<button type="button" class="bnb-remove-image">&times;</button>' +
+						'</div>');
+					$imagesContainer.append($image);
+				});
+
+				updateGalleryInput();
+			});
+
+			mediaFrame.open();
+		});
+
+		// Remove image button click.
+		$imagesContainer.on('click', '.bnb-remove-image', function(e) {
+			e.preventDefault();
+			$(this).closest('.bnb-gallery-image').remove();
+			updateGalleryInput();
+		});
+
+		// Make gallery sortable.
+		$imagesContainer.sortable({
+			items: '.bnb-gallery-image',
+			cursor: 'move',
+			update: function() {
+				updateGalleryInput();
+			}
+		});
+
+		/**
+		 * Update the hidden input with gallery image IDs.
+		 */
+		function updateGalleryInput() {
+			var ids = [];
+			$imagesContainer.find('.bnb-gallery-image').each(function() {
+				ids.push($(this).data('id'));
+			});
+			$input.val(ids.join(','));
+		}
+	}
+
 	// Initialize on document ready.
 	$(document).ready(function() {
 		initLicenseManagement();
+		initRoomGallery();
 	});
 
 })(jQuery);