I have an existing Flutter app that’s running smoothly, but I now need to extend it with a proper category-filter feature built on JSON mapping. The new filter must: • read its data structure from the current JSON response we already pull from the backend, • display those categories in a clean, responsive UI, and • update the visible list instantly when a user selects or clears a category. You will work in the current codebase (Dart / Flutter 3.x) and keep to our project style guide so the new widgets slot in naturally. I’ll provide the repository, sample JSON, and a quick walkthrough of the relevant state-management logic as soon as we start. Acceptance criteria • Code compiles with no warnings and passes flutter analyze • Category filter appears on both iOS and Android builds, matching our existing design language • Data mapping is handled exclusively via the provided JSON (no hard-coding) • A brief README outlines any new models, services, or third-party packages you add If you have recent experience bolting new features onto live Flutter apps—especially dynamic filtering—this should be a straightforward sprint. Let me know your timeline and any clarifying questions.