feat: Divi tools write library entries; global ones with dry run, confirm and backup (E2, F2)

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

src/Integrations/Divi/Pages/DiviPageLoader.php

@@ -44,8 +44,8 @@ final class DiviPageLoader
     /** Readers pass $forWrite = false (trashed entries may be read, like lit-content-get). */
     public function load(mixed $postId, bool $forWrite): DiviPage|WP_Error
     {
-        // Library entries (E1): only for reading so far, and only with a library access.
-        $item = $forWrite ? null : $this->library?->item($postId, false);
+        // Library entries (E1): with a library access, for reading and writing.
+        $item = $this->library?->item($postId, $forWrite);
         $post = $item ?? PostGuard::editable($postId, $this->schema, 'post_id', ! $forWrite);
         if ($post instanceof WP_Error) {
             return $post;
@@ -93,13 +93,14 @@ final class DiviPageLoader
     }
 
     /**
-     * Additional checks for writing: the type must use the Divi builder, the content must be a
-     * Divi 5 layout (or empty) and saving must not publish a missed schedule (spec §2).
+     * Additional checks for writing: the type must use the Divi builder (library entries always do),
+     * the content must be a Divi 5 layout (or empty) and saving must not publish a missed schedule
+     * (spec §2).
      */
     public function writable(DiviPage $page): ?WP_Error
     {
         $post = $page->post;
-        if (! $this->schema->diviEnabled((string) $post->post_type)) {
+        if (! $page->isLibraryItem() && ! $this->schema->diviEnabled((string) $post->post_type)) {
             return Errors::unsupported(
                 sprintf('Für den Inhaltstyp "%s" ist der Divi-Builder nicht aktiviert.', $post->post_type),
                 'In Divi → Theme-Optionen → Builder den Builder für diesen Inhaltstyp aktivieren (Administrator).'