Polish Electron desktop shell

electron/preload.cts

@@ -1,4 +1,4 @@
-import { contextBridge } from 'electron'
+import { contextBridge, ipcRenderer } from 'electron'
 
 contextBridge.exposeInMainWorld('ruwioDesktop', {
   platform: process.platform,
@@ -7,4 +7,11 @@ contextBridge.exposeInMainWorld('ruwioDesktop', {
     chrome: process.versions.chrome,
     node: process.versions.node,
   },
+  onMenuCommand(callback: (command: string) => void) {
+    const listener = (_event: Electron.IpcRendererEvent, command: string) => callback(command)
+    ipcRenderer.on('ruwio:menu-command', listener)
+    return () => {
+      ipcRenderer.removeListener('ruwio:menu-command', listener)
+    }
+  },
 })