fix(wrappers): eliminar wrappers vacíos y corregir exclusiones AdSense (Plan 99.15)

## Problema
- Componentes deshabilitados/excluidos dejaban wrappers HTML vacíos
  (navbar 32px, sidebar col-lg-3 294px)
- AdSense ignoraba exclusiones por URL pattern en grupo _exclusions

## Solución Plan 99.15 (Clean Architecture)

### Domain Layer
- WrapperVisibilityCheckerInterface: contrato para verificar visibilidad

### Application Layer
- CheckWrapperVisibilityUseCase: orquesta verificaciones de visibilidad

### Infrastructure Layer
- WordPressComponentVisibilityRepository: consulta BD + PageVisibilityHelper
- WrapperVisibilityService: facade estático para templates
- BodyClassHooksRegistrar: agrega clases CSS failsafe al body

### Templates modificados
- header.php: renderizado condicional de <nav> wrapper
- page.php/single.php: lógica dinámica col-lg-9/col-lg-12 según sidebar

### CSS Failsafe
- css-global-utilities.css: reglas body.roi-hide-* como respaldo

## Fix AdSense (Inc/adsense-placement.php)
- Agregado PageVisibilityHelper::shouldShow() a todas las funciones:
  roi_render_ad_slot, roi_render_rail_ads, roi_enqueue_adsense_script,
  roi_inject_content_ads, roi_render_anchor_ads, roi_render_vignette_ad,
  roi_enqueue_anchor_vignette_scripts

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

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

functions-addon.php

@@ -370,6 +370,11 @@ add_action('after_setup_theme', function() {
     $criticalCSSService = roi_get_critical_css_service();
     $hooksRegistrar = new \ROITheme\Shared\Infrastructure\Wordpress\CriticalCSSHooksRegistrar($criticalCSSService);
     $hooksRegistrar->register();
+
+    // 3. Body Class Hooks (Plan 99.15) - CSS failsafe para componentes ocultos
+    $container = \ROITheme\Shared\Infrastructure\Di\DIContainer::getInstance();
+    $bodyClassHooksRegistrar = $container->getBodyClassHooksRegistrar();
+    $bodyClassHooksRegistrar->register();
 });
 
 // =============================================================================
@@ -378,6 +383,47 @@ add_action('after_setup_theme', function() {
 // NO hardcodear CSS aquí - viola la arquitectura Clean Architecture.
 // =============================================================================
 
+// =============================================================================
+// HELPER FUNCTION: roi_should_render_wrapper() - Plan 99.15
+// =============================================================================
+
+/**
+ * Verifica si el wrapper de un componente debe renderizarse
+ *
+ * Evalúa:
+ * - is_enabled
+ * - show_on_mobile / show_on_desktop
+ * - Exclusiones (categoría, post ID, URL pattern, page visibility)
+ *
+ * USO EN TEMPLATES:
+ * ```php
+ * if (roi_should_render_wrapper('navbar')) {
+ *     echo '<nav class="navbar">';
+ *     echo roi_render_component('navbar');
+ *     echo '</nav>';
+ * }
+ * ```
+ *
+ * @param string $componentName Nombre del componente (kebab-case)
+ * @return bool True si el wrapper debe renderizarse
+ * @see Plan 99.15 - Fix Empty Layout Wrappers
+ */
+function roi_should_render_wrapper(string $componentName): bool {
+    return \ROITheme\Shared\Infrastructure\Services\WrapperVisibilityService::shouldRenderWrapper($componentName);
+}
+
+/**
+ * Verifica si AL MENOS UN componente de una lista debe renderizarse
+ *
+ * Útil para determinar si mostrar columna sidebar
+ *
+ * @param array<string> $componentNames Lista de nombres de componentes
+ * @return bool True si al menos uno debe mostrarse
+ */
+function roi_should_render_any_wrapper(array $componentNames): bool {
+    return \ROITheme\Shared\Infrastructure\Services\WrapperVisibilityService::shouldRenderAnyWrapper($componentNames);
+}
+
 // =============================================================================
 // HELPER FUNCTION: roi_get_adsense_search_config()
 // =============================================================================