feat(pay): 统一收银台四种模式（站内二维码/当前页跳转/表单提交/JSAPI）

- PaymentOrchestrator 统一返回 mode + code_url/payment_url/form_html/jsapi_params
- 支付宝：当面付二维码 / 电脑网站支付 / H5；微信：Native / H5 / JSAPI（WechatOpenid 静默授权）
- 易支付：PC mapi 二维码，移动端自动提交表单
- 删除旧键 alipay_payment_type / wechat_payment_type / epay_device 与 redirect/qr_content 字段
- 新增 pay-cashier.js，移除 window.open，订单状态接口改为 /pay/order/{n}
- 拆分 credits.js（affiliate / withdraw-history）至 1000 行以内

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/Content/PayOrders.php

@@ -544,21 +544,18 @@ trait PayOrders {
             );
         }
 
-        if (!empty($payment_result['redirect'])) {
+        $cashier = \AKSRT\Payment\PaymentOrchestrator::cashier_payload($payment_result);
+        if ($cashier !== []) {
             return [
                 'success' => true,
-                'data' => [
-                    'redirect' => true,
-                    'payment_url' => (string) ($payment_result['payment_url'] ?? ''),
-                    'qr_content' => (string) ($payment_result['qr_content'] ?? ''),
+                'data' => array_merge($cashier, [
                     'order_number' => $order_number,
 					'amount' => $amount_decimal,
                     'pay_modo' => '0',
                     'message' => $payment_result['message'],
                     'reload' => false,
-                    'poll' => true,
 					'replayed' => false,
-                ],
+                ]),
             ];
         }
 

src/Content/PayRest.php

@@ -37,7 +37,7 @@ trait PayRest {
             ],
         ]);
 
-        register_rest_route('aksrt/v1', '/pay/content/order/(?P<order_number>[A-Za-z0-9_-]+)', [
+        register_rest_route('aksrt/v1', '/pay/order/(?P<order_number>[A-Za-z0-9_-]+)', [
             'methods'             => 'GET',
             'callback'            => [$this, 'rest_order_status'],
             'permission_callback' => [$this, 'check_rest_nonce'],
@@ -164,7 +164,7 @@ trait PayRest {
 
 
     /**
-     * GET /pay/content/order/{order_number}
+     * GET /pay/order/{order_number} (all order types; guests limited to content orders)
      */
     public function rest_order_status(\WP_REST_Request $request) {
         $uid = get_current_user_id();

src/Content/VipServicePurchase.php

@@ -488,20 +488,17 @@ trait VipServicePurchase {
             );
         }
 
-        if (!empty($payment_result['redirect'])) {
+        $cashier = \AKSRT\Payment\PaymentOrchestrator::cashier_payload($payment_result);
+        if ($cashier !== []) {
             return [
                 'success' => true,
-                'data' => [
-                    'redirect' => true,
-                    'payment_url' => (string) ($payment_result['payment_url'] ?? ''),
-                    'qr_content' => (string) ($payment_result['qr_content'] ?? ''),
+                'data' => array_merge($cashier, [
                     'order_number' => $order_number,
 					'amount' => $amount_decimal,
                     'message' => $payment_result['message'],
                     'reload' => false,
-                    'poll' => true,
 					'replayed' => false,
-                ],
+                ]),
             ];
         }