Fix copy-paste not working on macOS

src-tauri/src/main.rs

@@ -3,8 +3,16 @@
   windows_subsystem = "windows"
 )]
 
+#[cfg(target_os = "macos")]
+mod menu;
+
 fn main() {
-  tauri::Builder::default()
+  let builder = tauri::Builder::default();
+
+  #[cfg(target_os = "macos")]
+  let builder = builder.menu(menu::menu());
+
+  builder
     .run(tauri::generate_context!())
     .expect("error while running tauri application");
-}
+}