feat(linux): inizializza ~/.cadroute all'avvio

Usa ~/.cadroute come directory runtime/settings su Linux e la crea prima di caricare la destinazione persistita.

main.js

@@ -8,6 +8,7 @@ const { processZip } = require('./services/zipProcessor');
 const CAD_EXTENSIONS = ['prt', 'asm', 'dwr'];
 const DEFAULT_DESTINATION = './output/cad';
 const SETTINGS_FILENAME = 'cad-router-settings.json';
+const LINUX_RUNTIME_DIR = '.cadroute';
 
 function buildConfig(destination) {
   const resolvedDestination = String(destination || '').trim() || DEFAULT_DESTINATION;
@@ -18,7 +19,19 @@ function buildConfig(destination) {
 }
 
 function getSettingsPath() {
-  return path.join(app.getPath('userData'), SETTINGS_FILENAME);
+  return path.join(getRuntimeDirectory(), SETTINGS_FILENAME);
+}
+
+function getRuntimeDirectory() {
+  if (process.platform === 'linux') {
+    return path.join(app.getPath('home'), LINUX_RUNTIME_DIR);
+  }
+
+  return app.getPath('userData');
+}
+
+async function ensureRuntimeDirectory() {
+  await fs.ensureDir(getRuntimeDirectory());
 }
 
 async function loadPersistedDestination() {
@@ -59,6 +72,7 @@ function createWindow() {
 }
 
 app.whenReady().then(async () => {
+  await ensureRuntimeDirectory();
   const persistedDestination = await loadPersistedDestination();
   config = buildConfig(persistedDestination);
   createWindow();