feat: Divi tools edit Theme Builder layouts; visible layouts need confirm

TB layouts load through ThemeBuilderAccess (P12), live layouts (attached +
enabled, Q8) need a dry run and confirm (Q9) and get the shared restore point
of VisibleEdits, extracted from GlobalEdits (Q2: backup when revisions are
off, P9 refusals, P14 naming). divi/post-content only in body layouts (F22),
also for nested stored nodes. SaveScope::ThemeBuilderLayout sets Divi flags
and clears site CSS + TB cache.

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

src/Integrations/Divi/Schema/ModuleCatalog.php

@@ -92,6 +92,24 @@ final class ModuleCatalog
         return array_values(array_unique(array_filter($children, 'is_string')));
     }
 
+    /**
+     * Theme Builder areas Divi renders the module in (appearance.themeBuilderLayouts, e.g. divi/post-content:
+     * ["body"]; ModuleRegistration.php:509-527); null = no limit.
+     *
+     * @return list<string>|null
+     */
+    public function themeBuilderAreas(string $name): ?array
+    {
+        $areas = $this->modules[$name]['appearance']['themeBuilderLayouts'] ?? null;
+        if (! is_array($areas)) {
+            return null;
+        }
+
+        $areas = array_values(array_filter($areas, 'is_string'));
+
+        return $areas === [] ? null : $areas;
+    }
+
     /** @return list<string> */
     public function paths(string $name): array
     {