fix: save window state (#313)

src-tauri/src/main.rs

@@ -52,6 +52,7 @@ async fn main() {
       MacosLauncher::LaunchAgent,
       None,
     ))
+    .plugin(tauri_plugin_window_state::Builder::default().build())
     .invoke_handler(tauri::generate_handler![
       cmd::drag_window,
       cmd::fullscreen,