完成大量美化

backend/main.py

@@ -17,12 +17,22 @@ for logger_name in ['uvicorn', 'uvicorn.access', 'fastapi']:
 
 # backend/app/main.py
 from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
 try:
     from backend.api.route import router
 except ImportError:
     from api.route import router
 app = FastAPI(title="LLM Workflow Engine")
 
+# 配置CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # 开发环境允许所有来源，生产环境应该指定具体域名
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
 # 注册路由
 app.include_router(router, prefix="/api")