feat: Divi hints point to the read tools; guides divi-structure/attrs/design-system; test: Divi read end-to-end

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

tests/Unit/Integrations/WordPress/Content/ContentUpdateAbilityTest.php

@@ -10,6 +10,7 @@ use LIT\MCP\Abilities\Rev;
 use LIT\MCP\Abilities\WriteFailed;
 use LIT\MCP\ChangeLog\ChangeLog;
 use LIT\MCP\Integrations\WordPress\Content\ContentUpdateAbility;
+use LIT\MCP\Integrations\WordPress\Content\PostPresenter;
 use LIT\MCP\Integrations\WordPress\Content\PostWriter;
 use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
 use LIT\MCP\Tests\Unit\TestCase;
@@ -116,9 +117,7 @@ final class ContentUpdateAbilityTest extends TestCase
             ->execute(['post_id' => 5, 'rev' => Rev::ofPost($this->post), 'content' => '<p>Neu</p>']);
 
         self::assertSame('lit_unsupported', $result->get_error_code());
-        self::assertStringNotContainsString('lit-divi', $result->get_error_message());
-        self::assertStringContainsString('Divi-Werkzeuge folgen in einer späteren Version; bis dahin im Divi-Builder '
-            . 'bearbeiten.', $result->get_error_data()['hint']);
+        self::assertStringContainsString(PostPresenter::DIVI_INACTIVE_NOTE, $result->get_error_data()['hint']);
     }
 
     public function testNothingToChangeIsAValidationError(): void