hoàn thành phần Authentication

backend/app/main.py

@@ -0,0 +1,27 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from .database import Base, engine
+from .routers import auth
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # Create all tables on startup (use Alembic for migrations in production)
+    Base.metadata.create_all(bind=engine)
+    yield
+
+
+app = FastAPI(title="LMS API", lifespan=lifespan)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:3000"],  # Next.js dev server
+    allow_credentials=True,                   # required for cookies
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(auth.router, prefix="/api")