fix: fs is undefined

src-tauri/src/app/invoke.rs

@@ -1,5 +1,5 @@
 use crate::util::{check_file_or_append, get_download_message, show_toast, MessageType};
-use std::fs::File;
+use std::fs::{self, File};
 use std::io::Write;
 use tauri::api::http::{ClientBuilder, HttpRequestBuilder, ResponseType};
 use tauri::{api, command, AppHandle, Manager, Window};