feat: lit/content-create with Divi short form

New input divi (1-30 sections, short form like lit-divi-insert) builds a Divi 5
layout in one divi/placeholder. The whole description is checked before the
insert (Divi's map for "no entry yet"); the draft is inserted with its normal
WordPress fields only, then DiviContentComposer composes again bound to the new
entry and stores it via DiviSaver::saveNew (same kses window as save(), strict
DiviFlags). A refusal or failure deletes the draft. Result adds tree_rev and the
outline.

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

src/Integrations/Divi/DiviIntegration.php

@@ -8,6 +8,7 @@ use LIT\MCP\ChangeLog\ChangeLog;
 use LIT\MCP\Integrations\Divi\Design\DesignSystemReader;
 use LIT\MCP\Integrations\Divi\Design\DiviDesignSystemAbility;
 use LIT\MCP\Integrations\Divi\Pages\DiviComposition;
+use LIT\MCP\Integrations\Divi\Pages\DiviContentComposer;
 use LIT\MCP\Integrations\Divi\Pages\DiviDeleteAbility;
 use LIT\MCP\Integrations\Divi\Pages\DiviDuplicateNodeAbility;
 use LIT\MCP\Integrations\Divi\Pages\DiviInsertAbility;
@@ -22,12 +23,14 @@ use LIT\MCP\Integrations\Divi\Pages\DiviWriter;
 use LIT\MCP\Integrations\Divi\Schema\DiviCatalogAbility;
 use LIT\MCP\Integrations\Divi\Schema\DiviModules;
 use LIT\MCP\Integrations\Integration;
+use LIT\MCP\Integrations\WordPress\Content\ContentComposer;
 use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
 
 /**
  * Divi 5 pages (spec §5, Etappe 2). Only available when the Divi 5 builder is loaded
  * (spec §2 principle 4); Divi 4 is never edited (spec §3.4). The write abilities share one
  * DiviWriter; each binds the composition to its entry via DiviWriter::composition().
+ * contentComposer() gives lit/content-create the Divi short form (spec §6.2).
  */
 final class DiviIntegration implements Integration
 {
@@ -50,6 +53,17 @@ final class DiviIntegration implements Integration
         return DiviModules::isAvailable();
     }
 
+    /** Divi short form for lit/content-create; available() reports whether Divi 5 is loaded. */
+    public function contentComposer(): ContentComposer
+    {
+        return new DiviContentComposer(
+            $this->schema,
+            new DiviComposition($this->modules, $this->design),
+            new DiviSaver(),
+            $this->design
+        );
+    }
+
     public function abilities(): array
     {
         $loader = new DiviPageLoader($this->schema);