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>

backend-web/public/index.php

@@ -61,6 +61,7 @@ Router::post('/api/v1/pay/orders/{order_no}/refund-request', [PayController::cla
 Router::post('/api/v1/pay/alipay/notify', [PayController::class, 'alipayNotify']);
 Router::post('/api/v1/pay/wechat/notify', [PayController::class, 'wechatNotify']);
 
+Router::get('/api/v1/soon-models/files/{name}', [SoonModelController::class, 'download']);
 Router::get('/api/v1/soon-models', [SoonModelController::class, 'index']);
 Router::get('/api/v1/settings', [SettingsController::class, 'publicSettings']);