first commit

backend/app/main.py

@@ -0,0 +1,43 @@
+"""FastAPI 入口。
+
+启动时自动建表（MVP 用 create_all；阶段1 切 Alembic 迁移，含 TimescaleDB hypertable）。
+"""
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from .api import router
+from .db import Base, engine
+from . import models  # noqa: F401  —— 注册 ORM 到 Base.metadata
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    yield
+
+
+app = FastAPI(
+    title="Stock Backtest",
+    description="历史回测 + 回放式模拟平台（A 股为主，不做实盘）",
+    version="0.1.0",
+    lifespan=lifespan,
+)
+
+# 开发期允许前端 dev server 跨域；上线收窄 origins
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(router)
+
+
+@app.get("/")
+async def root() -> dict:
+    return {"name": "Stock Backtest API", "docs": "/docs"}