enhancement: electron implementation for desktop application

preload.js

@@ -0,0 +1,7 @@
+const { contextBridge, ipcRenderer } = require('electron');
+
+// Exponer API segura al proceso renderer
+contextBridge.exposeInMainWorld('electron', {
+  send: (channel, data) => ipcRenderer.send(channel, data),
+  on: (channel, callback) => ipcRenderer.on(channel, (event, ...args) => callback(...args)),
+});