feat(ui): aggiunge guida utente e menu Help > Documentazione

main.js

@@ -1,4 +1,4 @@
-const { app, BrowserWindow, dialog, ipcMain, shell } = require('electron');
+const { app, BrowserWindow, dialog, ipcMain, shell, Menu } = require('electron');
 const path = require('path');
 const fs = require('fs-extra');
 
@@ -13,7 +13,7 @@ const {
 } = require('./services/unrouted');
 
 const CAD_EXTENSIONS = ['prt', 'asm', 'dwr'];
-const DEFAULT_DESTINATION = './output/cad';
+const DEFAULT_DESTINATION = 'X:\\';
 const SETTINGS_FILENAME = 'cad-router-settings.json';
 const LINUX_RUNTIME_DIR = '.cadroute';
 
@@ -79,6 +79,25 @@ function createWindow() {
   win.loadFile(path.join(__dirname, 'renderer', 'index.html'));
 }
 
+function createDocsWindow() {
+  const docs = new BrowserWindow({
+    width: 900,
+    height: 700,
+    title: 'CadRoute — Documentazione',
+    icon: path.join(__dirname, 'build', 'icon.png'),
+    webPreferences: { contextIsolation: true, nodeIntegration: false },
+  });
+  docs.loadFile(path.join(__dirname, 'renderer', 'docs', 'index.html'));
+  docs.setMenuBarVisibility(false);
+}
+
+Menu.setApplicationMenu(Menu.buildFromTemplate([
+  {
+    label: 'Help',
+    submenu: [{ label: 'Documentazione', click: () => createDocsWindow() }],
+  },
+]));
+
 app.whenReady().then(async () => {
   await ensureRuntimeDirectory();
   const persistedDestination = await loadPersistedDestination();