Few amendments required in flutter application (Connected with Magento Store)

We have developed a flutter-based application using flux store for Magento. Right now few changes are left which are mentioned below: Changes: *) Home page currently using JSON File Home page change JSON file to API *) Shipping charges are not coming at the time of checkout *) Cart is not syncing with the server even we enable the option & this application has builtin features for it *) The total cart discount coupon is not working. We need to send coupon codes & handle discounts when it returns results. It opens like a search feature we just want a field & apply button if the server responds with the discount it should be applied automatically. If code is wrong alert message & clear discount. Few minor requirements: *) Till the product is loading keep the loader on & don't show unavailable & 0 price product *) The wishlist page has a glitch it synced with the website when we exit the application & re & sometimes it shows new products only. (We have created a custom API that provides add, delete, view functionality for wishlist with the website). *) When clicking on a category or banner on the home page it shows the title "Products" on top replace the top name with a category name we clicked. This might be acheived by triggering the category if the name is not loaded. *) Formatting of pages slightly changes required. Alignment/spacing issues. *) Formatting of product list page & detail page. Alignment/spacing issues. If anything requires clarity, more information or you have limitations then do share. You can ask for each change in detail If you have worked before on flutter & Magento then these changes can be sorted.