Shopify Store Minor Fixes & Product Page Optimization

My Shopify store needs a short, focused round of improvements so I can roll out new marketing campaigns without layout hiccups. The theme is already live; I just need an experienced hand to finesse a few areas and make sure everything behaves perfectly on every screen size.

Scope of work
• Correct the product page layout on mobile (images, text blocks, buttons must flow cleanly and stay touch-friendly).
• Standardise product image sizing and alignment, then compress where possible to speed initial load.
• Create a new “Featured Products” section on the homepage that I can manage from Theme Editor.
• Optimise image loading throughout the catalogue for faster page-speed scores.
• Verify the add-to-cart button functions consistently across desktop, tablet and mobile.

Tech stack in use: Shopify Online Store 2.0 theme, Liquid templates, HTML/CSS and a light layer of JavaScript. All changes must be done inside the existing theme so future updates remain straightforward.

Deliverable
A fully tested theme update pushed to my development branch, along with a concise changelog outlining each file touched.

To be considered, please show past work that demonstrates similar Shopify theme customisations and responsive-design fixes.