feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/screen_design/__init__.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+大屏设计器模块
+"""
+from online_dev.screen_design.screen_api import router as screen_router
+from online_dev.screen_design.material_api import router as material_router
+
+__all__ = ['screen_router', 'material_router']