优化证书生成与正式部署配置

backend/app/main.py

@@ -1,12 +1,46 @@
+import logging
+from contextlib import asynccontextmanager
+
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 from app.api.router import api_router
 from app.core.config import settings
+from app.services.pdf_cleanup import cleanup_expired_pdfs
+
+logger = logging.getLogger(__name__)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """应用生命周期管理"""
+    # 启动时执行
+    logger.info("[应用启动] 初始化定时任务...")
+
+    # 启动后台清理任务
+    import asyncio
+    async def cleanup_task():
+        while True:
+            try:
+                # 每天执行一次PDF清理
+                await asyncio.sleep(24 * 60 * 60)  # 24小时
+                logger.info("[定时任务] 开始执行PDF清理...")
+                cleanup_expired_pdfs()
+            except Exception as e:
+                logger.error(f"[定时任务] PDF清理失败: {str(e)}")
+
+    # 启动后台任务
+    asyncio.create_task(cleanup_task())
+    logger.info("[应用启动] 定时任务已启动")
+
+    yield
+
+    # 关闭时执行
+    logger.info("[应用关闭] 清理资源...")
 
 
 def create_app() -> FastAPI:
-    app = FastAPI(title=settings.app_name)
+    app = FastAPI(title=settings.app_name, lifespan=lifespan)
     app.add_middleware(
         CORSMiddleware,
         allow_origins=settings.cors_origins,