Fix: pendingSelections sync and chips toolbar display

1. Fix Select All not persisting in list view:
   - Updated Select All handler to populate pendingSelections array
   - Updated Clear selection handler to clear pendingSelections for list view
   - Updated dropdown item click to add/remove from pendingSelections
   - Updated chip remove handler to filter pendingSelections

2. Fix chips toolbar (search/delete all) not showing:
   - PHP renderer was pre-creating chips-wrapper without toolbar
   - JS ensureChipsWrapper was skipping because wrapper existed
   - Removed wrapper from PHP so JS creates complete wrapper with toolbar

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

src/EntitySelector/EntitySelectorRenderer.php

@@ -1047,9 +1047,8 @@ class EntitySelectorRenderer
         switch ($valueType) {
             case 'entity_search':
                 $noItemsPlaceholder = $this->trans('No items selected - use search below');
-                $html .= '<div class="chips-wrapper">';
+                // Don't pre-wrap chips - JS will create the wrapper with toolbar when chips are added
                 $html .= '<div class="entity-chips ' . $chipsClass . '" data-placeholder="' . $this->escapeAttr($noItemsPlaceholder) . '"></div>';
-                $html .= '</div>';
                 $html .= '<div class="entity-search-box">';
                 $html .= '<i class="icon-search entity-search-icon"></i>';
                 $html .= '<input type="text" class="entity-search-input" placeholder="' . $this->trans('Search by name, reference, ID...') . '" autocomplete="off">';