feat(core): implement configuration-driven logic via SystemSetting

Integrate `SystemSetting` into core services to enable dynamic
configuration of business logic and update the WordPress order form
redirection to align with the new order approval workflow.

- Update `PaymentController`, `ShipmentObserver`, and `TrackingService`
  to utilize `SystemSetting` for runtime configuration.
- Modify `ifnex-order-form.js` to redirect users to the orders list
  instead of order details upon successful submission.

03_WordPress/wp-content/plugins/ifnex-bridge/assets/js/ifnex-order-form.js

@@ -760,9 +760,9 @@ jQuery(document).ready(function($) {
                 btn.prop('disabled', false).text('✅ تأیید و ثبت سفارش');
                 if (res.success) {
                     var orderId = res.data.data.id || res.data.id;
-                    // با فلوی جدید، کاربر به صفحه جزئیات سفارش هدایت می‌شود
+                    // با فلوی جدید، کاربر به لیست سفارشات هدایت می‌شود
                     // (چون پرداخت فقط بعد از تأیید کارمند امکان‌پذیر است)
-                    window.location.href = ifnex_ajax.orders_url + '?tab=orders';
+                    window.location.href = ifnex_ajax.orders_url;
                 } else {
                     $('#ifnex-submit-error').text(res.data || 'خطا در ثبت سفارش').show();
                 }

04_Laravel/app/Http/Controllers/Api/PaymentController.php

@@ -7,6 +7,7 @@ use App\Enums\TransactionStatus;
 use App\Http\Controllers\Controller;
 use App\Models\Wallet;
 use App\Models\WalletTransaction;
+use App\Models\SystemSetting;
 use App\Services\WalletService;
 use App\Services\ZarinpalService;
 use App\Services\MockZarinpalService;

04_Laravel/app/Observers/ShipmentObserver.php

@@ -3,6 +3,7 @@
 namespace App\Observers;
 
 use App\Models\Shipment;
+use App\Models\SystemSetting;
 use App\Notifications\ShipmentUpdatedNotification;
 use App\Notifications\ShipmentApprovedSms;
 use App\Notifications\ShipmentRejectedSms;

04_Laravel/app/Services/TrackingService.php

@@ -4,6 +4,7 @@ namespace App\Services;
 
 use App\Models\Shipment;
 use App\Models\ShipmentTrackingEvent;
+use App\Models\SystemSetting;
 
 class TrackingService
 {