fix(exclusions): Corregir Renderers que ignoraban sistema de exclusiones

Plan 99.11 - Correcciones críticas:

- FooterRenderer: Añadir PageVisibilityHelper::shouldShow()
- HeroSectionRenderer: Añadir PageVisibilityHelper::shouldShow()
- AdsensePlacementRenderer: Añadir PageVisibilityHelper::shouldShow()

Mejoras adicionales:
- UrlPatternExclusion: Soporte wildcards (*sct* → regex)
- ExclusionFormPartial: UI mejorada con placeholders
- ComponentConfiguration: Grupo _exclusions validado
- 12 FormBuilders: Integración UI de exclusiones
- 12 FieldMappers: Mapeo campos de exclusión

Verificado: Footer oculto en post con categoría excluida SCT

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

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

Admin/Hero/Infrastructure/FieldMapping/HeroFieldMapper.php

@@ -35,6 +35,12 @@ final class HeroFieldMapper implements FieldMapperInterface
             'heroVisibilityArchives' => ['group' => '_page_visibility', 'attribute' => 'show_on_archives'],
             'heroVisibilitySearch' => ['group' => '_page_visibility', 'attribute' => 'show_on_search'],
 
+            // Exclusions (grupo especial _exclusions - Plan 99.11)
+            'heroExclusionsEnabled' => ['group' => '_exclusions', 'attribute' => 'exclusions_enabled'],
+            'heroExcludeCategories' => ['group' => '_exclusions', 'attribute' => 'exclude_categories', 'type' => 'json_array'],
+            'heroExcludePostIds' => ['group' => '_exclusions', 'attribute' => 'exclude_post_ids', 'type' => 'json_array_int'],
+            'heroExcludeUrlPatterns' => ['group' => '_exclusions', 'attribute' => 'exclude_url_patterns', 'type' => 'json_array_lines'],
+
             // Content
             'heroShowCategories' => ['group' => 'content', 'attribute' => 'show_categories'],
             'heroShowBadgeIcon' => ['group' => 'content', 'attribute' => 'show_badge_icon'],