feat(rail-ads): rails responsive que llenan el espacio disponible

- Ancho calculado automaticamente: (viewport - container) / 2 - 20px
- 10px margen del viewport + 10px gap al container
- Selector simplificado: solo altura (250-1050px)
- AdSense usa data-full-width-responsive para adaptarse
- Media query actualizada: oculta en pantallas < 1620px

Admin/AdsensePlacement/Infrastructure/Ui/AdsensePlacementFormBuilder.php

@@ -462,51 +462,22 @@ final class AdsensePlacementFormBuilder
         $html .= '    </div>';
         $html .= '</div>';
 
-        // Format select - Multiples anchos y alturas disponibles
-        $railFormat = $this->renderer->getFieldValue($cid, 'behavior', 'rail_format', 'skyscraper');
-        $html .= $this->buildSelect($cid . 'RailFormat', 'Formato',
+        // Format select - Solo altura (el ancho es responsive)
+        $railFormat = $this->renderer->getFieldValue($cid, 'behavior', 'rail_format', 'h600');
+        $html .= $this->buildSelect($cid . 'RailFormat', 'Altura del Rail',
             $railFormat,
             [
-                // 130px width
-                'w130-h300' => '130x300',
-                'w130-h400' => '130x400',
-                'w130-h500' => '130x500',
-                'w130-h600' => '130x600',
-                // 140px width
-                'w140-h300' => '140x300',
-                'w140-h400' => '140x400',
-                'w140-h500' => '140x500',
-                'w140-h600' => '140x600',
-                // 150px width
-                'w150-h300' => '150x300',
-                'w150-h400' => '150x400',
-                'w150-h500' => '150x500',
-                'w150-h600' => '150x600',
-                // 160px width
-                'slim-small' => '160x300',
-                'slim-medium' => '160x400',
-                'slim-large' => '160x500',
-                'skyscraper' => '160x600 (Skyscraper)',
-                'slim-xlarge' => '160x700',
-                'wide-skyscraper' => '160x800',
-                // 300px width
-                'w300-h250' => '300x250 (Medium Rectangle)',
-                'half-page' => '300x600 (Half Page)',
-                'large-skyscraper' => '300x1050 (Large Skyscraper)',
-                // 400px width
-                'w400-h300' => '400x300',
-                'w400-h400' => '400x400',
-                'w400-h600' => '400x600',
-                // 500px width
-                'w500-h300' => '500x300',
-                'w500-h400' => '500x400',
-                'w500-h600' => '500x600',
-                // 600px width
-                'w600-h300' => '600x300',
-                'w600-h400' => '600x400',
-                'w600-h600' => '600x600'
+                'h250' => '250px (Compacto)',
+                'h300' => '300px (Pequeno)',
+                'h400' => '400px (Mediano)',
+                'h500' => '500px',
+                'h600' => '600px (Recomendado)',
+                'h700' => '700px',
+                'h800' => '800px (Grande)',
+                'h1050' => '1050px (Extra grande)'
             ]
         );
+        $html .= '<small class="text-muted d-block mt-1 mb-2">El ancho se ajusta automaticamente al espacio disponible.</small>';
 
         // Top offset - Select con opciones predefinidas
         $topOffset = $this->renderer->getFieldValue($cid, 'behavior', 'rail_top_offset', '300');