fix(omo): adapt to oh-my-openagent rename with backward compatibility

Closes https://github.com/farion1231/cc-switch/issues/1733

src-tauri/src/tray.rs

@@ -393,11 +393,10 @@ pub fn create_tray_menu(
         true,
         crate::lightweight::is_lightweight_mode(),
         None::<&str>,
-    ).map_err(|e| AppError::Message(format!("创建轻量模式菜单失败: {e}")))?;
+    )
+    .map_err(|e| AppError::Message(format!("创建轻量模式菜单失败: {e}")))?;
 
-    menu_builder = menu_builder
-        .item(&lightweight_item)
-        .separator();
+    menu_builder = menu_builder.item(&lightweight_item).separator();
 
     // 退出菜单（分隔符已在上面的 section 循环中添加）
     let quit_item = MenuItem::with_id(app, "quit", tray_texts.quit, true, None::<&str>)