fix: library IDs stay hidden without library access (ruling P13)

Outline, node-get, write outlines, the render summary and replace-text's
opaque-node match name no library ID unless the library group is visible
and the user has divi_library; read-only still names them.

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

tests/Unit/Integrations/Divi/DiviIntegrationTest.php

@@ -123,4 +123,25 @@ final class DiviIntegrationTest extends TestCase
         self::assertInstanceOf(WP_Error::class, $refusal);
         self::assertToolError($refusal, 'not_found');
     }
+
+    /**
+     * Ruling P13: library IDs follow the integration's library access – hidden with the group disabled
+     * and without the library right (no Divi in unit tests: DiviRoles allows nothing). The positive
+     * cases, "nur lesen" included, are in LibraryAccessTest (defining et_pb_is_allowed here would leak).
+     */
+    public function testLibraryIdsFollowTheLibraryAccess(): void
+    {
+        LibraryFixtures::given([]);
+        $schema = Mockery::mock(ContentSchema::class);
+        $asked = 0;
+        $hidden = new DiviIntegration($schema, FakeChangeLog::forbidden(), libraryVisible: static function () use (&$asked): bool {
+            ++$asked;
+
+            return false;
+        });
+
+        self::assertFalse($hidden->libraryIdsVisible());
+        self::assertSame(1, $asked);
+        self::assertFalse((new DiviIntegration($schema, FakeChangeLog::forbidden()))->libraryIdsVisible());
+    }
 }