Fix Martfury WooCommerce & Plugin

My WooCommerce store runs on the Martfury theme, and every time a plugin updates the homepage breaks—both its look and many key functions. After the last update, the header navigation, product listings, and even the footer widgets fell out of place. I need a clean fix that keeps the layout stable through future updates while preserving the theme’s original styling.

At the same time I want to tighten user security with OTP verification. I already own the Digits plugin and a Firebase account. Please hook the two together so customers get an SMS code:
• during new-user registration
• whenever they log in

Finally, I’d like a lightweight custom plugin that lets shoppers upload a prescription file (PDF or image) and instantly see price comparisons for substitute medicines. At this stage a simple comparison pulled from an editable price list or API is enough—I mainly need the upload form, a secure file store, and a results table on the product page.

Deliverables
• Stable Martfury child-theme or override that survives future plugin updates
• Working Firebase-powered OTP via Digits for registration and login
• Basic prescription-upload and medicine-comparison plugin packaged for easy install, with short admin guide

If you know WordPress hooks, WooCommerce templates, and Firebase auth, let’s get this sorted quickly.