Feature Architecture (Clean Architecture OOP)

Layer Overview

┌─────────────────────────────────────────────────────────────────┐
│  Presentation Layer (src/features/, src/app/)                   │
│  Server Actions (thin adapters), Components, Pages              │
├─────────────────────────────────────────────────────────────────┤
│  Application Layer (src/backend/application/)                   │
│  Use Cases, DTOs, Application Services                          │
├─────────────────────────────────────────────────────────────────┤
│  Infrastructure Layer (src/backend/infrastructure/)             │
│  Repository Implementations, External Services, DI Container    │
├─────────────────────────────────────────────────────────────────┤
│  Domain Layer (src/backend/domain/)                             │
│  Entities, Value Objects, Repository Interfaces, Domain Events  │
└─────────────────────────────────────────────────────────────────┘