UI: globalny auto-init Select2 z wyszukiwarka dla selectow >4 opcji

- Nowy libraries/adspro-select2-autoinit.js (auto-init na document.ready + ajaxComplete debounce 150ms)
- Wyszukiwarka odblokowana dla "Grupa reklam", "Kampania", "Klient" na /campaign_terms (data-adspro-select2="true")
- Globalne style Select2 w layout/style.scss i style.css (uogolnione z .products-page)
- Usuniety duplikat: blok CSS .products-page .select2-* i funkcja init_products_scope_select_search() w products

PAUL: phase 10-select2-global-search complete (plan 10-01)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

libraries/adspro-select2-autoinit.js

@@ -0,0 +1,153 @@
+/**
+ * adsPRO — globalny auto-init Select2.
+ *
+ * Inicjalizuje Select2 na kazdym <select> z >4 opcjami (oraz na select z
+ * atrybutem data-adspro-select2="true"). Pomija .no-select2 i juz zainicjalizowane.
+ * Wlacza allowClear gdy pierwsza opcja ma value="".
+ *
+ * Helper: window.adsproSelect2Init($root) — uruchamiany takze automatycznie
+ * na document.ready oraz po kazdym AJAX (debounce).
+ */
+(function( $ )
+{
+  if ( typeof $ === 'undefined' || typeof $.fn === 'undefined' || typeof $.fn.select2 === 'undefined' )
+  {
+    return;
+  }
+
+  var THRESHOLD = 4;
+
+  function should_init( $el )
+  {
+    if ( !$el.length )
+    {
+      return false;
+    }
+
+    if ( $el.data( 'select2' ) )
+    {
+      return false;
+    }
+
+    if ( $el.hasClass( 'no-select2' ) )
+    {
+      return false;
+    }
+
+    var force = $el.attr( 'data-adspro-select2' );
+
+    if ( force === 'false' )
+    {
+      return false;
+    }
+
+    if ( $el.closest( '.select2-container' ).length )
+    {
+      return false;
+    }
+
+    if ( $el.closest( '.dataTables_length' ).length )
+    {
+      return false;
+    }
+
+    if ( force === 'true' )
+    {
+      return true;
+    }
+
+    var option_count = $el.prop( 'options' ) ? $el.prop( 'options' ).length : $el.find( 'option' ).length;
+
+    return option_count > THRESHOLD;
+  }
+
+  function build_options( $el )
+  {
+    var options = { width: '100%' };
+    var first_option = $el.find( 'option' ).first();
+    var first_value = first_option.length ? first_option.attr( 'value' ) : null;
+    var placeholder = $el.attr( 'placeholder' );
+
+    if ( first_option.length && ( first_value === '' || typeof first_value === 'undefined' ) )
+    {
+      options.allowClear = true;
+
+      if ( !placeholder )
+      {
+        var text = $.trim( first_option.text() );
+        placeholder = text || 'Wybierz...';
+      }
+    }
+
+    if ( placeholder )
+    {
+      options.placeholder = placeholder;
+    }
+
+    if ( $.fn.select2.defaults && typeof $.fn.select2.defaults.set === 'function' )
+    {
+      // jezeli polski jezyk dostepny — nie wymuszamy globalnie, Select2 sam dobierze
+    }
+
+    return options;
+  }
+
+  function init_one( $el )
+  {
+    if ( !should_init( $el ) )
+    {
+      return;
+    }
+
+    try
+    {
+      $el.select2( build_options( $el ) );
+      $el.data( 'adspro-select2-ready', true );
+    }
+    catch ( err )
+    {
+      if ( window.console && console.warn )
+      {
+        console.warn( '[adspro-select2] init failed', err );
+      }
+    }
+  }
+
+  function init_all( $root )
+  {
+    var $scope = $root && $root.length ? $root : $( document.body );
+    var $selects = $scope.find( 'select' );
+
+    if ( $scope.is( 'select' ) )
+    {
+      $selects = $selects.add( $scope );
+    }
+
+    $selects.each( function()
+    {
+      init_one( $( this ) );
+    } );
+  }
+
+  window.adsproSelect2Init = init_all;
+
+  $( function()
+  {
+    init_all();
+  } );
+
+  var ajax_debounce_timer = null;
+
+  $( document ).ajaxComplete( function()
+  {
+    if ( ajax_debounce_timer )
+    {
+      clearTimeout( ajax_debounce_timer );
+    }
+
+    ajax_debounce_timer = setTimeout( function()
+    {
+      init_all();
+    }, 150 );
+  } );
+})( window.jQuery );