test: shared Divi fixtures in tests/Support (T1)

- DiviFixtures: markup(), givenPost(), schema(), designSystem(), catalog(),
  dynamicContentRegistry(), maliciousRefs() - moved verbatim out of
  DiviPageLoaderTest, DesignSystemTest, ModuleCatalogTest, DynamicContentMapTest
  and VariableRefTest (its malicious() provider now returns maliciousRefs()).
- ComposeFixture moves to tests/Support.
- DiviWriterFixture: modules(), designReader(), composition(), a recording saver(),
  log() and writer(&$saved, &$failures, unfiltered, loader) for the five tests that
  wired the Divi write stack by hand.
No test cases or assertions changed (1397 / 5834).

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

tests/Unit/Integrations/Divi/Schema/DiviCatalogAbilityTest.php

@@ -7,6 +7,7 @@ namespace LIT\MCP\Tests\Unit\Integrations\Divi\Schema;
 use Brain\Monkey\Functions;
 use LIT\MCP\Integrations\Divi\Schema\DiviCatalogAbility;
 use LIT\MCP\Integrations\Divi\Schema\DiviModules;
+use LIT\MCP\Tests\Support\DiviFixtures;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 
@@ -15,7 +16,7 @@ final class DiviCatalogAbilityTest extends TestCase
     private function ability(): DiviCatalogAbility
     {
         $modules = Mockery::mock(DiviModules::class);
-        $modules->allows('catalog')->andReturn(ModuleCatalogTest::sampleCatalog());
+        $modules->allows('catalog')->andReturn(DiviFixtures::catalog());
 
         return new DiviCatalogAbility($modules);
     }

tests/Unit/Integrations/Divi/Schema/ModuleCatalogTest.php

@@ -7,27 +7,14 @@ namespace LIT\MCP\Tests\Unit\Integrations\Divi\Schema;
 use LIT\MCP\Integrations\Divi\Schema\AttrPathIndex;
 use LIT\MCP\Integrations\Divi\Schema\ModuleCatalog;
 use LIT\MCP\Integrations\Divi\Schema\ShortformMap;
+use LIT\MCP\Tests\Support\DiviFixtures;
 use PHPUnit\Framework\TestCase;
 
 final class ModuleCatalogTest extends TestCase
 {
-    /** Real Divi 5.2.1 metadata (tests/Integration/divi-metadata-fixture.php). */
-    public static function sampleCatalog(): ModuleCatalog
-    {
-        $sample = json_decode(
-            (string) file_get_contents(dirname(__DIR__, 4) . '/Fixtures/divi/metadata-sample.json'),
-            true
-        );
-
-        return new ModuleCatalog(
-            $sample['metadata'],
-            static fn (string $name): array => (array) ($sample['defaults'][$name] ?? [])
-        );
-    }
-
     public function testKnowsModulesTitlesCategoriesAndChildren(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
 
         self::assertTrue($catalog->has('divi/button'));
         self::assertFalse($catalog->has('button'));
@@ -44,7 +31,7 @@ final class ModuleCatalogTest extends TestCase
 
     public function testDerivesAttributePathsFromSettingsAndDefaults(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
 
         foreach (
             [
@@ -93,7 +80,7 @@ final class ModuleCatalogTest extends TestCase
 
     public function testEveryShortformPathIsKnownForTheSampledModules(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
         foreach (['text', 'heading', 'button', 'image', 'blurb', 'code', 'accordion-item'] as $type) {
             foreach (ShortformMap::fields($type) as $field => $spec) {
                 self::assertTrue(
@@ -131,7 +118,7 @@ final class ModuleCatalogTest extends TestCase
 
     public function testDerivesAttributePathKindsFromComponentMetadataWherePossible(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
 
         self::assertSame('richtext', $catalog->pathKind('divi/text', 'content.innerContent'));
         self::assertSame('text', $catalog->pathKind('divi/heading', 'title.innerContent'));
@@ -154,7 +141,7 @@ final class ModuleCatalogTest extends TestCase
 
     public function testLeavesCompositeAttributePathsUnknownRatherThanGuessing(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
 
         // button.innerContent's only attrName-annotated node is the "link" sub-group itself
         // (component.type "group": link text + linkUrl + linkTarget), and its "text" sub-field
@@ -172,7 +159,7 @@ final class ModuleCatalogTest extends TestCase
      */
     public function testDerivesPerSubNameKindsForCompositePaths(): void
     {
-        $catalog = self::sampleCatalog();
+        $catalog = DiviFixtures::catalog();
 
         // imageIcon.innerContent (divi/blurb): useIcon (toggle), icon (icon-picker), src
         // (upload, image) each carry attrName + subName + their own field component.