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>

tests/Unit/Integrations/Divi/DiviCompatibilityTest.php

@@ -37,8 +37,18 @@ final class DiviCompatibilityTest extends TestCase
                 'et_theme_builder_clear_wp_cache (Theme-Builder-Cache)',
                 'Block-Typ divi/global-layout (Instanzen globaler Module)',
                 'Taxonomien layout_category, layout_tag (Bibliothek)',
+                'Theme Builder: Funktionen et_theme_builder_* und et_()',
+                'Theme Builder: Post-Typen et_template und Layouts',
             ],
             array_keys(DiviCompatibility::defaults())
         );
     }
+
+    public function testChecksTheThemeBuilderInternals(): void
+    {
+        $labels = array_keys(DiviCompatibility::defaults());
+
+        self::assertContains('Theme Builder: Funktionen et_theme_builder_* und et_()', $labels);
+        self::assertContains('Theme Builder: Post-Typen et_template und Layouts', $labels);
+    }
 }