Implements i18n for voice commands, adds AI features and trial buttons to LandingPage.tsx, and updates ar.json/en.json. Replit-Commit-Author: Agent Replit-Commit-Session-Id: 5a4f78b4-6a2e-4391-b005-5544e086dac8 Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/5512ebaf-680c-4b63-86d3-0a733fc165c0.jpg