QA-Luecke geschlossen: Legacy-Medien-URLs redirecten wieder (301)

Die Scope-Doku fuehrte den /thumbnails-Redirect als "ANGEPASST", im Code
existierte er nicht — alte Symfony-Bild-URLs (/thumbnails/..., /uploads/
...) liefen ins 404. Neuer LegacyMediaRedirectController mappt den
Original-Dateinamen (bleibt beim Medien-Import erhalten) auf die neue
Storage-URL fuer PM-Bilder und Firmenlogos; unbekannte Dateien bleiben
404. Gefunden bei der R6.1-Vorpruefung.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/Feature/Web/LegacyMediaRedirectTest.php

@@ -0,0 +1,56 @@
+<?php
+
+use App\Enums\Portal;
+use App\Models\Company;
+use App\Models\PressRelease;
+use App\Models\PressReleaseImage;
+use Illuminate\Support\Facades\Storage;
+use Tests\TestCase;
+
+test('old thumbnail and upload image urls redirect to the new storage url', function (string $prefix, string $dir) {
+    /** @var TestCase $this */
+    $release = PressRelease::factory()
+        ->published()
+        ->forPortal(Portal::Businessportal24)
+        ->create(['published_at' => now()->subDay()]);
+
+    $image = PressReleaseImage::query()->create([
+        'press_release_id' => $release->id,
+        'disk' => 'public',
+        'path' => "press-releases/{$release->id}/images/altes-pressebild.jpg",
+    ]);
+
+    $this->get("https://businessportal24.test/{$prefix}/{$dir}/altes-pressebild.jpg")
+        ->assertStatus(301)
+        ->assertRedirect($image->url());
+})->with([
+    'thumbnails' => ['thumbnails', 'pressreleaseimage'],
+    'uploads' => ['uploads', 'pressreleaseimage'],
+    'uploads underscore variant' => ['uploads', 'pressreleaseimage_'],
+]);
+
+test('old company logo urls redirect to the new logo url', function () {
+    /** @var TestCase $this */
+    // logoUrl() prüft die Existenz auf der Disk — Datei real anlegen.
+    Storage::fake('public');
+
+    $company = Company::factory()->create([
+        'portal' => Portal::Businessportal24,
+        'logo_path' => 'company-logos/businessportal24/1/firmenlogo.png',
+    ]);
+    Storage::disk('public')->put($company->logo_path, 'png');
+
+    $this->get('https://businessportal24.test/thumbnails/company/firmenlogo.png')
+        ->assertStatus(301)
+        ->assertRedirect($company->logoUrl());
+});
+
+test('unknown legacy media files stay 404', function () {
+    /** @var TestCase $this */
+    $this->get('https://businessportal24.test/thumbnails/pressreleaseimage/gibt-es-nicht.jpg')
+        ->assertNotFound();
+
+    // Andere Verzeichnisse werden nicht angefasst.
+    $this->get('https://businessportal24.test/thumbnails/sonstwas/datei.jpg')
+        ->assertNotFound();
+});