Split detail validation contracts

tests/Architecture/DetailValidationAssetContractTest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace MintyPHP\Tests\Architecture;
+
+use PHPUnit\Framework\TestCase;
+
+final class DetailValidationAssetContractTest extends TestCase
+{
+    use ProjectFileAssertionSupport;
+
+    public function testDefaultStyleGroupIncludesValidationSummaryComponentCss(): void
+    {
+        $content = $this->readProjectFile('config/assets.php');
+        $this->assertStringContainsString("'css/components/app-details-validation-summary.css'", $content);
+    }
+}