feat: Phase 3 - public registration pages and Mailwizz config

app/Http/Requests/SubscribePublicPageRequest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Requests;
+
+use App\Models\PreregistrationPage;
+use Illuminate\Foundation\Http\FormRequest;
+
+class SubscribePublicPageRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        /** @var PreregistrationPage $page */
+        $page = $this->route('publicPage');
+
+        return [
+            'first_name' => ['required', 'string', 'max:255'],
+            'last_name' => ['required', 'string', 'max:255'],
+            'email' => ['required', 'email', 'max:255'],
+            'phone' => $page->phone_enabled
+                ? ['required', 'string', 'max:20']
+                : ['nullable', 'string', 'max:20'],
+        ];
+    }
+
+    protected function prepareForValidation(): void
+    {
+        $email = $this->input('email');
+        if (is_string($email)) {
+            $this->merge([
+                'email' => strtolower(trim($email)),
+            ]);
+        }
+    }
+}