前端配置迁至 config/local.js，完善支付、模板库与部署脚本

- 页面直接引用 local.js 设置 SOON_DEPLOY_CONFIG，移除 deploy-config
- Docker sync-config 生成 local.js；更新 README 与 agent-core 说明
- 模板库自动扫描 .soon；新增后端部署/种子/排查脚本
- 完善支付配置、订阅弹窗与后台支付管理页

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/pages/design2.web.html

@@ -665,7 +665,7 @@
     <script src="../vendor/js/print.min.js"></script>
     <script src="../vendor/js/crypto-js.min.js"></script>
     <script src="../vendor/js/jspdf.umd.min.js"></script>
-    <script src="../assets/deploy-config.js"></script>
+    <script src="../config/local.js"></script>
     <script src="../js/common/auth-redirect.js"></script>
     <script src="../js/common/auth-session.js"></script>
     <script src="../js/common/member-pay-core.js"></script>