feat: delete subscribers from page subscriber list

Adds DELETE route, form request authorization, admin UI with confirm, Dutch strings, and feature tests.

Made-with: Cursor

app/Http/Controllers/Admin/SubscriberController.php

@@ -5,9 +5,11 @@ declare(strict_types=1);
 namespace App\Http\Controllers\Admin;
 
 use App\Http\Controllers\Controller;
+use App\Http\Requests\Admin\DestroySubscriberRequest;
 use App\Http\Requests\Admin\IndexSubscriberRequest;
 use App\Http\Requests\Admin\QueueMailwizzSyncRequest;
 use App\Models\PreregistrationPage;
+use App\Models\Subscriber;
 use App\Services\DispatchUnsyncedMailwizzSyncJobsService;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\View\View;
@@ -32,6 +34,15 @@ class SubscriberController extends Controller
         return view('admin.subscribers.index', compact('page', 'subscribers', 'unsyncedMailwizzCount'));
     }
 
+    public function destroy(DestroySubscriberRequest $request, PreregistrationPage $page, Subscriber $subscriber): RedirectResponse
+    {
+        $subscriber->delete();
+
+        return redirect()
+            ->route('admin.pages.subscribers.index', $page)
+            ->with('status', __('Subscriber removed.'));
+    }
+
     public function queueMailwizzSync(
         QueueMailwizzSyncRequest $request,
         PreregistrationPage $page,