fix(shop): wire order drawer ship/after-sale to live REST

Point OrderDetailDrawer at /shop/shipping and /shop/after-sale with
carrier/tracking_no and amount payloads matching backend contracts.
Map order detail context.buyer/address/shipping/after_sale for the
drawer, and include after-sale reason in summary items.

inc/classes/class-aksrt-after-sale.php

@@ -491,6 +491,7 @@ class AKSRT_After_Sale {
             'status_label' => (string) ($record['status_label'] ?? ''),
             'stage' => is_array($record['stage'] ?? null) ? $record['stage'] : [],
             'amount' => (float) ($record['amount'] ?? 0),
+            'reason' => (string) ($record['reason'] ?? ''),
             'created_at' => (string) ($record['created_at'] ?? ''),
             'updated_at' => (string) ($record['updated_at'] ?? ''),
             'resolved_at' => (string) ($record['resolved_at'] ?? ''),