Allow heading tags (h1-h6) in ContentSanitizer so news editor headings render

tests/Unit/Enhance/EnhanceValidatorTest.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Services\Enhance\EnhanceValidator;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Http\UploadedFile;
+use Illuminate\Validation\ValidationException;
+use Tests\TestCase;
+
+uses(TestCase::class, RefreshDatabase::class);
+
+it('validates a supported uploaded image and normalizes options', function (): void {
+    $file = UploadedFile::fake()->image('artwork.png', 1400, 900)->size(768);
+
+    $validated = app(EnhanceValidator::class)->validateUpload($file, [
+        'scale' => 4,
+        'mode' => 'illustration',
+        'engine' => 'stub',
+    ]);
+
+    expect($validated['scale'])->toBe(4);
+    expect($validated['mode'])->toBe('illustration');
+    expect($validated['engine'])->toBe('stub');
+    expect($validated['input_width'])->toBe(1400);
+    expect($validated['input_height'])->toBe(900);
+    expect($validated['input_mime'])->toBe('image/png');
+});
+
+it('rejects unsupported image formats', function (): void {
+    $file = UploadedFile::fake()->create('vector.svg', 10, 'image/svg+xml');
+
+    app(EnhanceValidator::class)->validateUpload($file, [
+        'scale' => 2,
+        'mode' => 'standard',
+        'engine' => 'stub',
+    ]);
+})->throws(ValidationException::class);