test: do not depend on a built asset manifest

CI has no build, so every page rendering through @vite threw a view exception —
dozens of failures with one cause. withoutVite() makes the suite test the
application rather than the state of the asset pipeline; a broken build shows up
in the build job, which is where it belongs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/TestCase.php

@@ -6,5 +6,12 @@ use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
 
 abstract class TestCase extends BaseTestCase
 {
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        // The suite must not depend on a built manifest.
+        $this->withoutVite();
+    }
     //
 }