BodyBalanceEvaluation/frontend/src/renderer/main/preload.js

const { contextBridge, ipcRenderer } = require('electron');

contextBridge.exposeInMainWorld('electronAPI', {
  generateReportPdf: (payload) => ipcRenderer.invoke('generate-report-pdf', payload),
  getBackendUrl: () => process.env.BACKEND_URL || 'http://localhost:5000',
  getSocketTransports: () => {
    const allowPolling = process.env.ALLOW_POLLING === '1'
    return allowPolling ? ['websocket', 'polling'] : ['websocket']
  }
});