Ngarsitek aplikasi Flutter kanthi bener involves mpisahake concern (UI, business logic, data), milih pendekatan state management, lan struktur kode kanggo maintainability, testability, lan scalability. Arsitektur sing apik penting nalika aplikasi berkembang.
Pemisahan concern (layers)
Separate the app into LAYERS with clear responsibilities:
PRESENTATION (UI) → widgets/screens; display + user interaction (no business logic)
BUSINESS LOGIC → state management, use cases, app logic (independent of UI)
DATA → repositories, data sources (APIs, local DB), models
→ Each layer has ONE responsibility; depends only on lower layers → maintainable, testable.
