Updated checkout to wait for backend confirmation before advancing, added a “Processing payment…” state with retry/ refresh fallback, and now use Paddle totals/currency for purchase records + confirmation emails (with new email translations).

app/Http/Requests/Checkout/CheckoutSessionStatusRequest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Http\Requests\Checkout;
+
+use App\Models\CheckoutSession;
+use Illuminate\Foundation\Http\FormRequest;
+
+class CheckoutSessionStatusRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        $session = $this->route('session');
+
+        if (! $session instanceof CheckoutSession) {
+            return false;
+        }
+
+        $user = $this->user();
+
+        if (! $user) {
+            return false;
+        }
+
+        return (int) $session->user_id === (int) $user->id;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            //
+        ];
+    }
+
+    /**
+     * Get custom validation messages.
+     */
+    public function messages(): array
+    {
+        return [
+            'session.required' => 'Checkout-Session fehlt.',
+        ];
+    }
+}