Backend-WIP: Kontakt-Queue, Page-Cache, Validierungs-Feedback, i18n

Gebuendelt, da ueber gemeinsame lang-/Service-Dateien verschraenkt:
- Kontakt-Nachrichten: contact_messages-Tabelle + Model/Enums/Factory,
  Admin-Queue (livewire/admin/contact-messages), ContactController
  persistiert das Anliegen zusaetzlich zur Brand-Mail
- Page-Data-Cache (Services/Web/*PageData) + web-archive-Indizes auf
  press_releases
- Validierungs-Feedback + Company-Portal-Restriction (Feature-Tests)
- i18n-Auslagerung lang/de|en (auth, passwords, validation, static)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/Feature/PressReleaseWithdrawalWaiverTest.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Enums\AiTextDeclaration;
 use App\Enums\PressReleaseStatus;
 use Database\Seeders\RolesAndPermissionsSeeder;
 use Illuminate\Support\Facades\Queue;
@@ -35,6 +36,9 @@ test('submitting records the archive notice consent timestamp on the press relea
     expect($pr->withdrawal_waiver_consented_at)->toBeNull();
 
     LivewireVolt::test('customer.press-releases.show', ['id' => $pr->id])
+        // KI-Kennzeichnung (Art. 50 KI-VO) ist Pflicht im Submit-Modal.
+        ->set('aiTextDeclaration', AiTextDeclaration::None->value)
+        ->set('aiDeclarationConfirmed', true)
         ->call('submitForReview')
         ->assertHasNoErrors();