Style: integrated chips filter toolbar design

- Wrap filter input in pill-shaped container (.chips-filter-group)
- Remove hard border separation between toolbar and chips
- Make toolbar feel like part of the chips area with shared background
- Smaller, subtler count badge and clear button
- Clear button styled as danger pill that fills on hover
- Responsive: hide clear text on small screens

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

assets/js/admin/entity-selector.js

@@ -3953,14 +3953,16 @@
             var trans = this.config.trans || {};
             var $picker = $chips.closest('.value-picker');
 
-            // Create wrapper structure - simple inline toolbar
+            // Create wrapper structure - integrated filter toolbar
             var wrapperHtml = '<div class="chips-wrapper">' +
                 '<div class="chips-toolbar">' +
+                '<span class="chips-filter-group">' +
                 '<i class="icon-search"></i>' +
                 '<input type="text" class="chips-search-input" placeholder="' + (trans.filter || 'Filter') + '...">' +
+                '</span>' +
                 '<span class="chips-count"></span>' +
                 '<button type="button" class="btn-chips-clear" title="' + (trans.clear_all || 'Clear all') + '">' +
-                '<i class="icon-trash"></i> <span class="clear-text">' + (trans.clear_all || 'Clear all') + '</span>' +
+                '<i class="icon-trash"></i> <span class="clear-text">' + (trans.clear || 'Clear') + '</span>' +
                 '</button>' +
                 '</div>' +
                 '<div class="chips-load-more" style="display:none;"></div>' +