Fix preview popover styling and icon preservation

- Preserve icon structure when updating total count in trait badge
- Add gap between title and count in preview popover header
- Style the count badge with background, padding, and rounded corners

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

sources/js/admin/entity-selector/_preview.js

@@ -31,7 +31,15 @@
 
             var $totalBadge = this.$wrapper.find('.trait-total-count');
             if (total > 0) {
-                $totalBadge.text(total).show();
+                // Update count while preserving icon structure
+                var $countValue = $totalBadge.find('.count-value');
+                if ($countValue.length) {
+                    $countValue.text(total);
+                } else {
+                    // Fallback: set HTML with icon
+                    $totalBadge.html('<i class="icon-eye"></i> <span class="count-value">' + total + '</span>');
+                }
+                $totalBadge.show();
             } else {
                 $totalBadge.hide();
             }