feat(payment): align VIP/balance/order schema keys with Zibll

Extract payment readers into AKSRT_Settings_Payment_Runtime and store
canonical Zibll option IDs (pay_user_vip_*, pay_balance_*, pay_box_position,
pay_mark, pay_rebate_*, pay_income_*) in aksrt_settings with no legacy
payment_* dual-read. Update PHP/JS payment schemas and VIP sidebar gate.

assets/admin/src/schema/sections/payment/paid.js

@@ -9,11 +9,11 @@ export const paidSchema = {
     payment_vip_exempt_roles: '',
     payment_paid_catalog_note: '',
     payment_manual_delivery_note: '付费或人工确认内容请在订单备注中记录交付方式。',
-    payment_paid_mark: '付费',
+    pay_mark: '付费',
     payment_currency_symbol: '￥',
-    payment_paid_show_user: true,
-    payment_paid_show_paycount: true,
-    payment_paid_box_position: 'top',
+    pay_show_user: true,
+    pay_show_paycount: true,
+    pay_box_position: 'top',
     payment_download_enable: false,
     payment_download_remote_s: true,
     payment_download_verify_nonce: true,
@@ -47,11 +47,11 @@ export const paidSchema = {
       title: '展示设置',
       icon: 'fas fa-eye',
       fields: [
-        { key: 'payment_paid_mark', label: '付费标记', type: 'input', default: '付费' },
+        { key: 'pay_mark', label: '付费标记', type: 'input', default: '付费' },
         { key: 'payment_currency_symbol', label: '货币符号', type: 'input', default: '￥', help: '商品价格前缀，如 ￥、$、¥' },
-        { key: 'payment_paid_show_user', label: '显示购买用户', type: 'switch', default: true },
-        { key: 'payment_paid_show_paycount', label: '显示购买次数', type: 'switch', default: true },
-        { key: 'payment_paid_box_position', label: '付费框位置', type: 'radio', default: 'top', options: [{ label: '内容顶部（正文前）', value: 'top' }, { label: '内容底部（正文后）', value: 'bottom' }] },
+        { key: 'pay_show_user', label: '显示购买用户', type: 'switch', default: true },
+        { key: 'pay_show_paycount', label: '显示购买次数', type: 'switch', default: true },
+        { key: 'pay_box_position', label: '付费框位置', type: 'radio', default: 'top', options: [{ label: '内容顶部（正文前）', value: 'top' }, { label: '内容底部（正文后）', value: 'bottom' }] },
       ],
     },
     {