fix: Container width setting now applies correctly + Rail Ads improvements

- Fix container width not applying: css-global-responsive.css now uses
  CSS variable --roi-container-width instead of hardcoded values
- Add 8 Rail format options: slim-small (160x300), slim-medium (160x400),
  slim-large (160x500), skyscraper (160x600), slim-xlarge (160x700),
  wide-skyscraper (160x800), half-page (300x600), large-skyscraper (300x1050)
- Change rail_top_offset from text input to select with preset values
- Fix Rail Ads JavaScript positioning (moved after HTML, added retries)
- ThemeSettingsRenderer now always outputs CSS variables for layout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Admin/AdsensePlacement/Infrastructure/Ui/AdsensePlacementFormBuilder.php

@@ -462,16 +462,35 @@ final class AdsensePlacementFormBuilder
         $html .= '    </div>';
         $html .= '</div>';
 
-        // Format select
+        // Format select - Opciones de altura para anuncios verticales
         $railFormat = $this->renderer->getFieldValue($cid, 'behavior', 'rail_format', 'skyscraper');
         $html .= $this->buildSelect($cid . 'RailFormat', 'Formato',
             $railFormat,
-            ['skyscraper' => 'Skyscraper (160x600)', 'half-page' => 'Half Page (300x600)']
+            [
+                'slim-small' => 'Slim Small (160x300)',
+                'slim-medium' => 'Slim Medium (160x400)',
+                'slim-large' => 'Slim Large (160x500)',
+                'skyscraper' => 'Skyscraper (160x600)',
+                'slim-xlarge' => 'Slim XLarge (160x700)',
+                'wide-skyscraper' => 'Wide Skyscraper (160x800)',
+                'half-page' => 'Half Page (300x600)',
+                'large-skyscraper' => 'Large Skyscraper (300x1050)'
+            ]
         );
 
-        // Top offset
-        $topOffset = $this->renderer->getFieldValue($cid, 'behavior', 'rail_top_offset', '150');
-        $html .= $this->buildTextInput($cid . 'RailTopOffset', 'Distancia desde arriba (px)', $topOffset);
+        // Top offset - Select con opciones predefinidas
+        $topOffset = $this->renderer->getFieldValue($cid, 'behavior', 'rail_top_offset', '300');
+        $html .= $this->buildSelect($cid . 'RailTopOffset', 'Distancia desde arriba',
+            $topOffset,
+            [
+                '150' => '150px (Cerca del header)',
+                '200' => '200px',
+                '300' => '300px (Recomendado)',
+                '400' => '400px',
+                '500' => '500px',
+                '700' => '700px (Debajo del fold)'
+            ]
+        );
 
         $html .= '    </div>';
         $html .= '</div>';