first add

backend/app/main.py

@@ -1,3 +1,44 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from .core.config import settings
+from .core.database import init_db
+from .api.routes import jobs as jobs_routes
+from .core.logging import setup_logging
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(
+        title=settings.APP_NAME,
+        version=settings.APP_VERSION,
+        docs_url="/docs",
+        redoc_url="/redoc",
+        openapi_url=f"{settings.API_V1_PREFIX}/openapi.json",
+    )
+
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=settings.CORS_ORIGINS,
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+    app.include_router(jobs_routes.router, prefix=f"{settings.API_V1_PREFIX}/jobs", tags=["jobs"])
+
+    @app.on_event("startup")
+    def _on_startup() -> None:
+        setup_logging(settings.LOG_LEVEL, settings.LOG_FORMAT)
+        init_db()
+
+    @app.get("/healthz")
+    def healthz() -> dict:
+        return {"status": "ok"}
+
+    return app
+
+
+app = create_app()
+
 """FastAPI 主应用"""
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware