Module 4: UI Design From Scratch
Once the new screens have been designed, the application still needs the code structure to support them cleanly. This lesson is where the design work turns back into application engineering: model objects, reusable form logic, quantity editing, map integration, HTML content, and the small animation details that make the whole flow feel deliberate.
One of the key ideas here is that richer UI usually demands a clearer model. A dish is no longer just something painted on screen. It now has identity, descriptive data, pricing, image variants, and behaviors associated with ordering. That is why the lesson starts pulling the underlying data representation into a more explicit form.
The rest of the code changes follow naturally from the design decisions made earlier. The about form needs a structured way to host HTML content. The contact screen needs map integration and action buttons that connect to native capabilities. The checkout flow needs quantity editing and removal behavior that feels smooth instead of abrupt. None of these are isolated gimmicks. They are consequences of choosing to build a fuller application rather than a static mockup.
The animation and overlay details are especially useful because they show how polish often comes from sequencing rather than from fancy APIs. Remove an element, let the layout animate, then update totals and related UI once the movement is complete. That order matters. It prevents visual interference and makes the app feel more intentional.
The same is true of layered components, overlays, and special visual treatments. They are easiest to reason about once you understand which parts are structural and which parts are just visual support. A glass pane, a layered layout, or a positioned overlay can solve a very specific problem cleanly if the rest of the form architecture is already sound.
So the summary of this lesson is that extending a UI from mockup to working app requires both taste and structure. The design choices create new requirements, and the code has to respond by becoming more explicit, more reusable, and a little more architectural than the early demo version.