🔒 Fix DOM-Based XSS via innerHTML

[LVT-ENG]

🎯 What: The vulnerability fixed is a DOM-Based XSS in tryonyou-app/src/services/CommerceEngine.js caused by using innerHTML to create a checkout overlay.
⚠️ Risk: The use of innerHTML can potentially allow attackers to inject malicious scripts into the application if dynamic user data is ever incorporated, putting the codebase and its users at risk.
🛡️ Solution: The fix eliminates the vulnerability by replacing innerHTML with safe DOM manipulation methods such as document.createElement, style.cssText and textContent.

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PR created automatically by Jules for task 13160814808399388800 started by @LVT-ENG

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