Restrict application menu functionality to macOS

- Updated `applyApplicationMenu` and `setupApplicationMenuEvents` functions to return early if the platform is not macOS, ensuring that menu features are only available on macOS.
- Adjusted the `createMainWindow` function to conditionally call menu setup functions based on the operating system, improving cross-platform compatibility.

src/desktop/menu.js

@@ -132,6 +132,10 @@ function buildApplicationMenuTemplate() {
 }
 
 export function applyApplicationMenu() {
+  if (process.platform !== "darwin") {
+    return;
+  }
+
   ApplicationMenu.setApplicationMenu(buildApplicationMenuTemplate());
 }
 
@@ -150,6 +154,10 @@ export function setupApplicationMenuEvents({
   onToggleDevTools,
   onCheckForUpdates,
 }) {
+  if (process.platform !== "darwin") {
+    return;
+  }
+
   navigateHandler = onNavigate;
 
   ApplicationMenu.on("application-menu-clicked", (event) => {

src/desktop/window.js

@@ -261,6 +261,8 @@ export async function createMainWindow(rpc) {
   }
 
   setupMainWindowMessaging(mainWindow)
+
+  if (isMacOS) {
     applyApplicationMenu()
     setupApplicationMenuEvents({
       onNavigate: sendNavigateToRenderer,
@@ -271,6 +273,7 @@ export async function createMainWindow(rpc) {
         sendToRenderer('checkForUpdates')
       }
     })
+  }
 
   setupWindowEvents(mainWindow)
   applyStartupWindowState(mainWindow)