refactor: ReleaseGate::invalidate() als einzige Stelle zum Zurücksetzen des Freigabe-Zustands; CompatibilityMatrix::locked() und ReleaseGate::lockOf() ersetzen die drei Kopien der Sperrprüfung

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/Unit/Integrations/Divi/Release/CompatibilityMatrixTest.php

@@ -8,6 +8,7 @@ use LIT\MCP\Integrations\Divi\Release\CompatibilityMatrix;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Integrations\Divi\Release\FeatureStatus;
 use LIT\MCP\Integrations\Divi\Release\ReleaseState;
+use LIT\MCP\Tests\Support\ReleaseMatrices;
 use PHPUnit\Framework\TestCase;
 
 final class CompatibilityMatrixTest extends TestCase
@@ -84,6 +85,29 @@ final class CompatibilityMatrixTest extends TestCase
         );
     }
 
+    public function testLockedNamesEveryUnusableFeatureOnceInTheGivenOrder(): void
+    {
+        $matrix = ReleaseMatrices::matrix(
+            [DiviFeature::LibraryWrite, DiviFeature::ThemeBuilderWrite, DiviFeature::Catalog],
+            ReleaseState::Incompatible
+        );
+
+        $locked = $matrix->locked([
+            DiviFeature::PageWrite,
+            DiviFeature::ThemeBuilderWrite,
+            DiviFeature::LibraryWrite,
+            DiviFeature::ThemeBuilderWrite,
+        ]);
+
+        self::assertSame(
+            [DiviFeature::ThemeBuilderWrite, DiviFeature::LibraryWrite],
+            array_map(static fn (FeatureStatus $status): DiviFeature => $status->feature, $locked)
+        );
+        self::assertSame(ReleaseState::Incompatible, $locked[0]->state);
+        self::assertSame([], $matrix->locked([DiviFeature::PageWrite, DiviFeature::PageRead]));
+        self::assertSame([], $matrix->locked([]));
+    }
+
     public function testToArrayListsEveryFeatureInCaseOrder(): void
     {
         $rows = self::matrix(['tb-write' => [ReleaseState::Incompatible, ['b']]])->toArray();