fix: sync allow_methods с main — добавить HEAD и OPTIONS

backend/main.py

@@ -120,7 +120,7 @@ app = FastAPI(lifespan=lifespan)
 app.add_middleware(
     CORSMiddleware,
     allow_origins=[config.FRONTEND_ORIGIN],
-    allow_methods=["GET", "POST"],
+    allow_methods=["GET", "HEAD", "OPTIONS", "POST"],
     allow_headers=["Content-Type", "Authorization"],
 )