feat(payment): 支付&付费菜单按参考主题重构并新增提现策略页

- 子菜单重组为知识付费/余额充值/VIP会员/创作分成/推广返佣/收款接口/提现策略
- 收款接口页 1:1 复刻 Zibll 双下拉结构，仅保留支付宝/微信/PayPal/Stripe/易支付
- 订单前缀/流水号前缀/提现单号前缀配置保留并移入收款接口页
- 知识付费/推广返佣按参考主题全字段复刻，余额充值并入充值卡配置
- 新增 tabbed/between_number/page_select 表单控件及后端 pages 搜索源
- 清理旧 SPA 组件、无消费者 REST 端点与废弃配置键（不写双路兼容）
- 更新存量契约测试至新 schema 文件

src/Payment/Gateway.php

@@ -45,7 +45,7 @@ class Gateway {
     }
 
     /**
-     * 获取可用网关列表（已配置的）
+     * 获取可用网关列表（已配置的），按「收款接口显示顺序」配置排序。
      */
     public function get_available(): array {
         $available = [];
@@ -54,7 +54,48 @@ class Gateway {
                 $available[$id] = $gateway;
             }
         }
-        return $available;
+        return $this->apply_sdk_order($available);
+    }
+
+    /**
+     * 按 pay_sdk_order（收款接口显示顺序）重排可用网关。
+     * 易支付子通道跟随对应渠道槽位（epay_wxpay 跟随 wechat、epay_alipay 跟随 alipay）；
+     * 未配置顺序时保持注册顺序，未纳入槽位的扩展网关保持在末尾。
+     *
+     * @param array<string,GatewayInterface> $available
+     * @return array<string,GatewayInterface>
+     */
+    private function apply_sdk_order(array $available): array {
+        $settings = \AKSRT\Settings\Settings::get_all();
+        $configured = (array) ($settings['pay_sdk_order'] ?? []);
+        $order = array_values(array_filter(array_map('sanitize_key', array_keys($configured))));
+        if (!$order) {
+            return $available;
+        }
+
+        $slot_map = [
+            'wechat'    => ['wechatpay', 'epay_wxpay'],
+            'alipay'    => ['alipay', 'epay_alipay'],
+            'paypal'    => ['paypal'],
+            'stripe'    => ['stripe'],
+            'balance'   => ['balance'],
+            'card_pass' => ['card_pass'],
+        ];
+
+        $sorted = [];
+        foreach ($order as $slot) {
+            foreach (($slot_map[$slot] ?? []) as $id) {
+                if (isset($available[$id]) && !isset($sorted[$id])) {
+                    $sorted[$id] = $available[$id];
+                }
+            }
+        }
+        foreach ($available as $id => $gateway) {
+            if (!isset($sorted[$id])) {
+                $sorted[$id] = $gateway;
+            }
+        }
+        return $sorted;
     }
 
     /**
@@ -311,7 +352,7 @@ class Gateway {
         }
 
         $gateway_id = sanitize_key((string) ($order['payment_method'] ?? ''));
-        if ($gateway_id === '' || in_array($gateway_id, ['balance', 'points', 'manual_review'], true)) {
+        if ($gateway_id === '' || in_array($gateway_id, ['balance', 'points'], true)) {
             return null;
         }
         $gateway = $this->get_gateway($gateway_id);