feat: lit/divi-outline and lit/divi-node-get with tree_rev

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

src/Integrations/Divi/Pages/DiviPage.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\Divi\Pages;
+
+use LIT\MCP\Abilities\Rev;
+use LIT\MCP\Integrations\Divi\BlockTree\Document;
+use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
+use WP_Post;
+
+/**
+ * An entry loaded for the Divi tools: the post, its parsed tree, the path index and the
+ * tree_rev (hash of post_content – the optimistic lock of the Divi tools, ruling P16; the
+ * post-level lock stays `rev` = Rev::ofPost()).
+ */
+final class DiviPage
+{
+    public function __construct(
+        public readonly WP_Post $post,
+        public readonly Document $document,
+        public readonly NodeIndex $index
+    ) {
+    }
+
+    public function treeRev(): string
+    {
+        return Rev::of((string) $this->post->post_content);
+    }
+
+    /** Whether post_content is a Divi 5 layout (or empty, so a first section can be added). */
+    public function isDiviLayout(): bool
+    {
+        $content = (string) $this->post->post_content;
+
+        return trim($content) === '' || str_contains($content, '<!-- wp:divi/');
+    }
+
+    public function editUrl(): string
+    {
+        return (string) add_query_arg('et_fb', '1', (string) get_permalink($this->post));
+    }
+}