feat: add MMGame backend and frontend source code

backend/app/main.py

@@ -0,0 +1,31 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from contextlib import asynccontextmanager
+from app.database import init_db
+from app.routers import auth, scripts, games
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    await init_db()
+    yield
+
+
+app = FastAPI(title="AI剧本杀", version="0.1.0", lifespan=lifespan)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(auth.router)
+app.include_router(scripts.router)
+app.include_router(games.router)
+
+
+@app.get("/api/health")
+async def health():
+    return {"status": "ok"}