Keep cross-platform tray menu imports available

Linux release builds use MenuBuilder for the shared tray menu, while MenuItemBuilder and SubmenuBuilder are only used in the macOS native menu bar. Gate only the macOS-only imports so Linux builds no longer warn about them and still compile the shared tray path.

Constraint: Linux builds compile the shared tray setup path and require MenuBuilder

Constraint: MenuItemBuilder and SubmenuBuilder are only referenced inside cfg(target_os = "macos")

Rejected: Gate the whole tauri::menu import on macOS | Linux still needs MenuBuilder for tray menu construction

Confidence: high

Scope-risk: narrow

Directive: Do not gate MenuBuilder by platform unless setup_system_tray is also made platform-specific

Tested: cargo fmt --check

Tested: git diff --check

Not-tested: Local Linux cargo check beyond system GTK/WebKit pkg-config setup; GitHub release Linux job is the verification surface

Author: NanmiCoder

desktop/src-tauri/src/lib.rs

@@ -16,8 +16,9 @@ use std::{
 
 use portable_pty::{native_pty_system, ChildKiller, CommandBuilder, MasterPty, PtySize};
 use serde::{Deserialize, Serialize};
+use tauri::menu::MenuBuilder;
 #[cfg(target_os = "macos")]
-use tauri::menu::{MenuBuilder, MenuItemBuilder, SubmenuBuilder};
+use tauri::menu::{MenuItemBuilder, SubmenuBuilder};
 use tauri::tray::{MouseButton, MouseButtonState, TrayIconBuilder, TrayIconEvent};
 use tauri::Emitter;
 use tauri::{AppHandle, Manager, PhysicalPosition, PhysicalSize, RunEvent, State, WindowEvent};