Chrome/Edge Fullscreen Escape Suppression

I’m developing a presentation-style webpage that must stay in true fullscreen once the visitor clicks “Start.” The flow is straightforward: invoke the Fullscreen API, immediately lock the keyboard with `navigator.keyboard.lock()`, and make sure no other keys are processed... (Budget: ₹600 - ₹1500 INR, Jobs: Certified Ethical Hacking, CSS, Java, JavaScript, Technical Writing, Web Development, Web Security)