Subscription module: add gateway capability flow and UX fixes

includes/Api/CheckoutController.php

@@ -288,6 +288,12 @@ class CheckoutController
             'next_payment_date' => $sub->next_payment_date,
             'end_date' => $sub->end_date,
             'recurring_amount' => (float) $sub->recurring_amount,
+            // §9 — Renewal messaging. The order-pay page can choose between
+            // "auto-renew enabled" and "manual renewal only" copy.
+            'payment_method' => $sub->payment_method,
+            'gateway_supports_auto_renew' => !empty($sub->payment_method)
+                ? \WooNooW\Modules\Subscription\GatewayCapabilities::should_attempt_auto_renew($sub->payment_method)
+                : false,
         ];
     }
 
@@ -324,7 +330,9 @@ class CheckoutController
         }
 
         // Create order
-        $order = wc_create_order();
+        $order = wc_create_order([
+            'created_via' => 'checkout'
+        ]);
         if (is_wp_error($order)) {
             return ['error' => $order->get_error_message()];
         }