Harden MVP runtime and fix packaged desktop white screen

main.js

@@ -1,15 +1,2 @@
-const { app, BrowserWindow } = require('electron');
-const path = require('path');
-
-app.whenReady().then(() => {
-  const win = new BrowserWindow({
-    width: 1400,
-    height: 900,
-    webPreferences: { nodeIntegration: false },
-    titleBarStyle: 'hiddenInset', // mac-native title bar
-    icon: path.join(__dirname, 'icon.png')
-  });
-  win.loadFile(path.join(__dirname, 'dist', 'index.html'));
-});
-
-app.on('window-all-closed', () => process.platform !== 'darwin' && app.quit());
+// Root Electron shim: delegate to the maintained process entrypoint.
+require('./frontend/electron/main.cjs');