feat(admin): add affiliate marketing screens and admin order integration

includes/Api/OrdersController.php

@@ -672,6 +672,39 @@ class OrdersController
       }
     }
 
+    // Get related affiliate referral
+    if (ModuleRegistry::is_enabled('affiliate')) {
+      if (class_exists('\WooNooW\Modules\Affiliate\AffiliateTracker')) {
+        global $wpdb;
+        $referral = \WooNooW\Modules\Affiliate\AffiliateTracker::get_referral_for_order($id);
+        if ($referral) {
+          $affiliates_table = $wpdb->prefix . 'woonoow_affiliates';
+          $affiliate = $wpdb->get_row($wpdb->prepare(
+            "SELECT a.*, u.display_name as affiliate_name, u.user_email as affiliate_email
+             FROM $affiliates_table a
+             LEFT JOIN $wpdb->users u ON a.user_id = u.ID
+             WHERE a.id = %d",
+            $referral->affiliate_id
+          ));
+
+          if ($affiliate) {
+            $data['affiliate'] = [
+              'has_referral'      => true,
+              'referral_id'       => (int) $referral->id,
+              'commission'        => (float) $referral->commission_amount,
+              'currency'          => $referral->currency,
+              'status'            => $referral->status,
+              'cancelled_reason'  => $referral->cancelled_reason ?: null,
+              'affiliate_id'      => (int) $affiliate->id,
+              'affiliate_name'    => $affiliate->affiliate_name ?: __('Unknown', 'woonoow'),
+              'affiliate_email'   => $affiliate->affiliate_email ?: '',
+              'commission_rate'   => (float) $affiliate->commission_rate,
+            ];
+          }
+        }
+      }
+    }
+
     // Allow plugins to modify response (Level 1 compatibility)
     $data = apply_filters('woonoow/order_api_data', $data, $order, $req);