feat(ux): after-sale multi-step, ban appeal, message types, coupon wallet

Orders center gains after-sale tickets (return ship/cancel/timeline),
coupon wallet list, ban-appeal page, and expanded message center tabs.

src/AKSRT/Shop/Part1.php

@@ -49,6 +49,55 @@ trait Part1 {
         ];
     }
 
+    /**
+     * List after-sale tickets for current user.
+     */
+    public function get_user_after_sales(int $user_id): array {
+        if ($user_id <= 0 || !class_exists('\AKSRT\Payment\AfterSale')) {
+            return ['items' => []];
+        }
+        $items = \AKSRT\Payment\AfterSale::get_instance()->get_user_tickets($user_id, 50);
+        return ['items' => $items];
+    }
+
+    /**
+     * User submits return shipping info.
+     */
+    public function submit_after_sale_return(int $user_id, int $ticket_id, array $payload): array {
+        if ($user_id <= 0 || $ticket_id <= 0 || !class_exists('\AKSRT\Payment\AfterSale')) {
+            return ['success' => false, 'message' => __('售后系统不可用。', 'aksrt')];
+        }
+        $carrier = sanitize_text_field((string) ($payload['carrier'] ?? ''));
+        $tracking = sanitize_text_field((string) ($payload['tracking_no'] ?? ''));
+        if ($carrier === '' || $tracking === '') {
+            return ['success' => false, 'message' => __('请填写快递公司与运单号。', 'aksrt')];
+        }
+        $ok = \AKSRT\Payment\AfterSale::get_instance()->user_submit_return_shipping($ticket_id, $user_id, $carrier, $tracking);
+        if (!$ok) {
+            return ['success' => false, 'message' => __('提交退货物流失败，请确认工单状态。', 'aksrt')];
+        }
+        $ticket = \AKSRT\Payment\AfterSale::get_instance()->get($ticket_id);
+        return [
+            'success' => true,
+            'message' => __('退货物流已提交', 'aksrt'),
+            'data'    => $ticket ? \AKSRT\Payment\AfterSale::get_instance()->decorate_user_ticket($ticket) : ['id' => $ticket_id],
+        ];
+    }
+
+    /**
+     * User cancels after-sale ticket.
+     */
+    public function cancel_after_sale(int $user_id, int $ticket_id, string $reason = ''): array {
+        if ($user_id <= 0 || $ticket_id <= 0 || !class_exists('\AKSRT\Payment\AfterSale')) {
+            return ['success' => false, 'message' => __('售后系统不可用。', 'aksrt')];
+        }
+        $ok = \AKSRT\Payment\AfterSale::get_instance()->user_cancel($ticket_id, $user_id, $reason);
+        if (!$ok) {
+            return ['success' => false, 'message' => __('无法取消该售后工单。', 'aksrt')];
+        }
+        return ['success' => true, 'message' => __('已取消售后申请', 'aksrt')];
+    }
+
     public function get_product_archive_view(array $args = []): array {
         $taxonomy = sanitize_key((string) ($args['taxonomy'] ?? ''));
         $term_id  = (int) ($args['term_id'] ?? 0);