Split detail validation contracts

tests/Architecture/DetailValidationTemplateContractTest.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace MintyPHP\Tests\Architecture;
+
+use PHPUnit\Framework\TestCase;
+
+final class DetailValidationTemplateContractTest extends TestCase
+{
+    use ProjectFileAssertionSupport;
+
+    public function testScopedDetailTemplatesUseSharedValidationSummaryPartial(): void
+    {
+        foreach (DetailValidationContractFiles::detailTemplateFiles() as $file) {
+            $content = $this->readProjectFile($file);
+            $this->assertStringContainsString(
+                "require templatePath('partials/app-details-validation-summary.phtml');",
+                $content,
+                $file
+            );
+            $this->assertStringContainsString(
+                '$validationSummaryErrors = $validationSummaryErrors ?? ($errors ?? []);',
+                $content,
+                $file
+            );
+        }
+    }
+
+    public function testScopedDetailTemplatesDoNotInlineLegacyErrorLoop(): void
+    {
+        foreach (DetailValidationContractFiles::detailTemplateFiles() as $file) {
+            $content = $this->readProjectFile($file);
+            $this->assertSame(0, preg_match('/foreach\s*\(\$errors\s+as\s+\$error\)/', $content), $file);
+        }
+    }
+
+    public function testSharedPartialExposesValidationSummaryContract(): void
+    {
+        $content = $this->readProjectFile('templates/partials/app-details-validation-summary.phtml');
+
+        $this->assertStringContainsString('data-validation-summary', $content);
+        $this->assertStringContainsString('data-validation-summary-autofocus=', $content);
+        $this->assertStringContainsString('data-validation-error-link', $content);
+        $this->assertStringNotContainsString('class="notice"', $content);
+    }
+}