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/Pages/DiviWriteAbility.php

@@ -36,11 +36,13 @@ abstract class DiviWriteAbility implements Ability
         return ToolResult::schema([
             'tree_rev' => ['type' => 'string'],
             // Global library entries (answer F2): the pages that show the entry, and the backup
-            // made when revisions are off.
+            // made when revisions are off (also for live Theme Builder layouts, ruling Q2).
             'affected' => ['type' => 'array', 'items' => ['type' => 'object']],
             'affected_count' => ['type' => 'integer'],
             'hidden_count' => ['type' => 'integer'],
             'backup_id' => ['type' => 'integer'],
+            // Theme Builder layouts: the enabled templates that show the layout.
+            'templates' => ['type' => 'array', 'items' => ['type' => 'object']],
         ], ['tree_rev']);
     }