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>

docker/docker-compose.yml

@@ -57,7 +57,7 @@ services:
     volumes:
       - ../frontend-web:/var/www/web:ro
       - ../frontend-electron:/var/www/electron:ro
-      - ./config/deploy-config.js:/var/www/web/assets/deploy-config.js:ro
+      - ./config/local.js:/var/www/web/config/local.js:ro
       - ./nginx/frontend.conf:/etc/nginx/conf.d/default.conf:ro
     depends_on:
       - api