Focus on Entities first, Then use cases then go the Presentation layer.
Loose Coupling, High Cohesion.
Coupling: The degree of direct knowledge that one element has of another!
High Cohesion: Keep similar & related things together!!!
Do front end as Loose Coupling, High Cohesion!
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As you look in the image above, Start from Entities, Then Use Cases and then the UI! It's a good practise... Do remember the dependency rule.