Add clickable preview popover to filter group toggles

- Add showFilterGroupPreviewPopover method in _preview.js
- Make toggle-count badges clickable with data attributes
- Add event binding for .toggle-count.clickable in _events.js
- Add hover/active/loading styles for clickable toggle-count
- Requires previewFilterGroupProducts AJAX handler in PHP backend

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

assets/js/admin/entity-selector.js

@@ -231,6 +231,23 @@
                 }
             });
 
+            // Filter group toggle count badge click for preview popover
+            $(document).on('click', '.filter-group-toggle .toggle-count.clickable', function(e) {
+                e.stopPropagation();
+                e.preventDefault();
+
+                var $badge = $(this);
+                var groupId = $badge.data('groupId');
+                var groupType = $badge.data('type');
+                var groupName = $badge.data('groupName');
+
+                if ($badge.hasClass('popover-open')) {
+                    self.hidePreviewPopover();
+                } else {
+                    self.showFilterGroupPreviewPopover($badge, groupId, groupType, groupName);
+                }
+            });
+
             // Close popover when clicking outside
             $(document).on('click', function(e) {
                 if (!$(e.target).closest('.target-preview-popover').length &&
@@ -238,7 +255,8 @@
                     !$(e.target).closest('.condition-match-count').length &&
                     !$(e.target).closest('.group-count-badge').length &&
                     !$(e.target).closest('.group-modifiers').length &&
-                    !$(e.target).closest('.group-preview-badge').length) {
+                    !$(e.target).closest('.group-preview-badge').length &&
+                    !$(e.target).closest('.toggle-count.clickable').length) {
                     self.hidePreviewPopover();
                 }
             });
@@ -3501,10 +3519,10 @@
 
             if (this.filterableData.attributes && this.filterableData.attributes.length > 0) {
                 this.filterableData.attributes.forEach(function(group) {
-                    var html = '<button type="button" class="filter-group-toggle" data-group-id="' + group.id + '" data-type="attribute">';
+                    var html = '<button type="button" class="filter-group-toggle" data-group-id="' + group.id + '" data-type="attribute" data-group-name="' + self.escapeAttr(group.name) + '">';
                     html += '<span class="toggle-name">' + group.name + '</span>';
                     if (group.count !== undefined) {
-                        html += '<span class="toggle-count"><i class="icon-eye"></i> (' + group.count + ')</span>';
+                        html += '<span class="toggle-count clickable" data-group-id="' + group.id + '" data-type="attribute" data-group-name="' + self.escapeAttr(group.name) + '"><i class="icon-eye"></i> ' + group.count + '</span>';
                     }
                     html += '</button>';
                     $attrContainer.append(html);
@@ -3518,10 +3536,10 @@
 
             if (this.filterableData.features && this.filterableData.features.length > 0) {
                 this.filterableData.features.forEach(function(group) {
-                    var html = '<button type="button" class="filter-group-toggle" data-group-id="' + group.id + '" data-type="feature">';
+                    var html = '<button type="button" class="filter-group-toggle" data-group-id="' + group.id + '" data-type="feature" data-group-name="' + self.escapeAttr(group.name) + '">';
                     html += '<span class="toggle-name">' + group.name + '</span>';
                     if (group.count !== undefined) {
-                        html += '<span class="toggle-count"><i class="icon-eye"></i> (' + group.count + ')</span>';
+                        html += '<span class="toggle-count clickable" data-group-id="' + group.id + '" data-type="feature" data-group-name="' + self.escapeAttr(group.name) + '"><i class="icon-eye"></i> ' + group.count + '</span>';
                     }
                     html += '</button>';
                     $featContainer.append(html);
@@ -7580,6 +7598,118 @@
                 price = parseFloat(price) || 0;
             }
             return price.toFixed(2) + ' €';
+        },
+
+        /**
+         * Show preview popover for filter group toggle (attribute/feature groups)
+         */
+        showFilterGroupPreviewPopover: function($badge, groupId, groupType, groupName) {
+            var self = this;
+
+            this.hidePreviewPopover();
+
+            $badge.addClass('popover-open loading');
+            this.$activeBadge = $badge;
+
+            var trans = this.config.trans || {};
+            var entityLabelPlural = 'products';
+
+            // Fetch products matching this attribute/feature group
+            $.ajax({
+                url: this.config.ajaxUrl,
+                type: 'POST',
+                dataType: 'json',
+                data: {
+                    ajax: 1,
+                    action: 'previewFilterGroupProducts',
+                    trait: 'EntitySelector',
+                    group_id: groupId,
+                    group_type: groupType,
+                    limit: 10
+                },
+                success: function(response) {
+                    $badge.removeClass('loading');
+
+                    if (response.success) {
+                        var items = response.items || [];
+                        var totalCount = response.count || 0;
+                        var hasMore = response.hasMore || false;
+
+                        self.showFilterGroupItemsPopover($badge, items, totalCount, hasMore, entityLabelPlural, groupName, groupType);
+                    } else {
+                        $badge.removeClass('popover-open');
+                        self.$activeBadge = null;
+                    }
+                },
+                error: function() {
+                    $badge.removeClass('loading popover-open');
+                    self.$activeBadge = null;
+                }
+            });
+        },
+
+        /**
+         * Show popover for filter group preview items
+         */
+        showFilterGroupItemsPopover: function($badge, items, totalCount, hasMore, entityLabel, groupName, groupType) {
+            var self = this;
+            var trans = this.config.trans || {};
+
+            var typeLabel = groupType === 'attribute' ? (trans.attribute || 'Attribute') : (trans.feature || 'Feature');
+            var html = '<div class="target-preview-popover preview-type-filter-group">';
+
+            html += '<div class="preview-header">';
+            html += '<span class="preview-count">' + totalCount + ' ' + entityLabel + '</span>';
+            html += '<button type="button" class="preview-close"><i class="icon-times"></i></button>';
+            html += '</div>';
+
+            if (items.length > 0) {
+                html += '<div class="preview-list">';
+                html += this.renderPreviewItems(items);
+                html += '</div>';
+
+                if (hasMore) {
+                    var remaining = totalCount - items.length;
+                    html += '<div class="preview-footer">';
+                    html += '<span class="preview-more-info">+ ' + remaining + ' ' + (trans.more || 'more') + '</span>';
+                    html += '</div>';
+                }
+            } else {
+                html += '<div class="preview-empty">' + (trans.no_preview || 'No items to preview') + '</div>';
+            }
+
+            html += '</div>';
+
+            var $popover = $(html);
+            $('body').append($popover);
+
+            $popover.find('.preview-close').on('click', function() {
+                self.hidePreviewPopover();
+            });
+
+            // Position popover below badge
+            var badgeOffset = $badge.offset();
+            var badgeHeight = $badge.outerHeight();
+            var badgeWidth = $badge.outerWidth();
+            var popoverWidth = $popover.outerWidth();
+
+            var leftPos = badgeOffset.left + (badgeWidth / 2) - (popoverWidth / 2);
+            var minLeft = 10;
+            var maxLeft = $(window).width() - popoverWidth - 10;
+            leftPos = Math.max(minLeft, Math.min(leftPos, maxLeft));
+
+            var topPos = badgeOffset.top + badgeHeight + 8;
+
+            $popover.css({
+                position: 'absolute',
+                top: topPos,
+                left: leftPos,
+                zIndex: 10000
+            });
+
+            $popover.addClass('show');
+
+            this.$previewPopover = $popover;
         }
     };