Shopify Shirt Configurator Integration

I already have a working HTML mock-up of a fabric-picker for Delagoa Clothing. Your task is to transplant that configurator into a single Shopify product page so shoppers can customise one specific shirt online. How it should work • Customers click fabric thumbnails, then tap any of four predefined zones—collar, cuffs, pocket, button placket—to apply the print. • Each zone selected adds €5 to the base price in real time. • When the customer checks out, every choice is pushed to the order notes so my fulfilment team sees exactly which pattern belongs on which zone. • The module must scale gracefully on mobile. Beyond the prototype – Keep to Shopify’s default theme styling; no bespoke branding work is needed this round. – Add basic Shopify user-account support so logged-in shoppers can return later. – Store unfinished configurations to the customer’s account so they can resume editing on a later visit. I will hand over: • The HTML/JS configurator file, 525 × 457 px base shirt image and precise zone coordinates. • Brand colours, fonts and any other assets you might need, even though the default theme should suffice. You will return a fully functional product page in my Shopify admin, plus any liquid, JS or app settings required. Please confirm which Shopify theme or app framework you plan to use and your estimated turnaround time.