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/Navbar/Infrastructure/FieldMapping/NavbarFieldMapper.php

@@ -36,6 +36,12 @@ final class NavbarFieldMapper implements FieldMapperInterface
             'navbarVisibilityArchives' => ['group' => '_page_visibility', 'attribute' => 'show_on_archives'],
             'navbarVisibilitySearch' => ['group' => '_page_visibility', 'attribute' => 'show_on_search'],
 
+            // Exclusions (grupo especial _exclusions - Plan 99.11)
+            'navbarExclusionsEnabled' => ['group' => '_exclusions', 'attribute' => 'exclusions_enabled'],
+            'navbarExcludeCategories' => ['group' => '_exclusions', 'attribute' => 'exclude_categories', 'type' => 'json_array'],
+            'navbarExcludePostIds' => ['group' => '_exclusions', 'attribute' => 'exclude_post_ids', 'type' => 'json_array_int'],
+            'navbarExcludeUrlPatterns' => ['group' => '_exclusions', 'attribute' => 'exclude_url_patterns', 'type' => 'json_array_lines'],
+
             // Layout
             'navbarContainerType' => ['group' => 'layout', 'attribute' => 'container_type'],
             'navbarPaddingVertical' => ['group' => 'layout', 'attribute' => 'padding_vertical'],