feat: Theme Builder adapter, template value and per-object access

DiviThemeBuilder wraps Divi's Theme Builder: reads through Divi's functions,
writes layouts/templates through insert_layout/store_template behind a
wp_die guard (edit_others_posts and function checks first, every handler
filter and output buffer restored in finally), list/conditions/enabled
mirrored from Divi's own save. Template: live = attached and enabled,
whatever the post status (ruling Q8/B8). ThemeBuilderAccess: edit_others_posts
plus Divi's theme_builder role, hidden IDs answer like missing ones,
canEditTemplate (B11) and layoutsRefusal (B10). DiviCompatibility checks the
Theme Builder functions and post types (E15).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/Integrations/Divi/DiviCompatibility.php

@@ -8,6 +8,7 @@ use LIT\MCP\Integrations\Divi\BlockTree\GlobalInstance;
 use LIT\MCP\Integrations\Divi\Library\DiviLibraryStore;
 use LIT\MCP\Integrations\Divi\Pages\DynamicContentMap;
 use LIT\MCP\Integrations\Divi\Schema\DiviModules;
+use LIT\MCP\Integrations\Divi\ThemeBuilder\DiviThemeBuilder;
 use Throwable;
 
 defined('ABSPATH') || exit;
@@ -64,6 +65,15 @@ final class DiviCompatibility
                 static fn (): bool => self::knowsGlobalLayout(),
             'Taxonomien layout_category, layout_tag (Bibliothek)' =>
                 static fn (): bool => taxonomy_exists('layout_category') && taxonomy_exists('layout_tag'),
+            'Theme Builder: Funktionen et_theme_builder_* und et_()' =>
+                static fn (): bool => (new DiviThemeBuilder())->missing() === [],
+            'Theme Builder: Post-Typen et_template und Layouts' => static fn (): bool => array_filter(
+                array_merge(
+                    [DiviThemeBuilder::THEME_BUILDER, DiviThemeBuilder::TEMPLATE],
+                    array_values(DiviThemeBuilder::LAYOUT_TYPES)
+                ),
+                static fn (string $type): bool => ! post_type_exists($type)
+            ) === [],
         ];
     }