feat(exclusions): Integrate exclusion UI in CtaBoxSidebar component

- Add ExclusionFormPartial to CtaBoxSidebarFormBuilder
- Add _exclusions fields to CtaBoxSidebarFieldMapper with types
- Update AdminAjaxHandler to process json_array types via ExclusionFieldProcessor
- Enqueue exclusion-toggle.js in AdminAssetEnqueuer

The exclusion UI now appears in CTA Box Sidebar visibility section,
allowing admins to exclude component from specific categories,
post IDs, or URL patterns.

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

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

Admin/CtaBoxSidebar/Infrastructure/Ui/CtaBoxSidebarFormBuilder.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 namespace ROITheme\Admin\CtaBoxSidebar\Infrastructure\Ui;
 
 use ROITheme\Admin\Infrastructure\Ui\AdminDashboardRenderer;
+use ROITheme\Admin\Shared\Infrastructure\Ui\ExclusionFormPartial;
 
 /**
  * FormBuilder para el CTA Box Sidebar
@@ -130,6 +131,13 @@ final class CtaBoxSidebarFormBuilder
         $html .= '            </div>';
         $html .= '        </div>';
 
+        // =============================================
+        // Reglas de exclusion avanzadas
+        // Grupo especial: _exclusions (Plan 99.11)
+        // =============================================
+        $exclusionPartial = new ExclusionFormPartial($this->renderer);
+        $html .= $exclusionPartial->render($componentId, 'cta');
+
         $html .= '    </div>';
         $html .= '</div>';