refactor: restructure application to CQRS, update api-types + presentation

- application: replace flat use_cases/ with identity/{commands,queries}/ and organization/commands/
- each use case now split into Command/Query struct + Handler struct
- api-types: add username to RegisterRequest/UserResponse, add CreateAlbumRequest/AlbumResponse
- presentation: update state, handlers, factory to use new handler types
- tests: restructured to match CQRS module layout, added get_profile tests

crates/bootstrap/src/factory.rs

@@ -12,7 +12,7 @@ use adapters_postgres::{connect, run_migrations, PostgresUserRepository};
 
 use adapters_storage::{ObjectStorageAdapter, StorageConfig, build_store};
 
-use application::use_cases::{GetProfile, LoginUser, RegisterUser};
+use application::identity::{RegisterUserHandler, LoginUserHandler, GetProfileHandler};
 use presentation::{routes::app_router, state::AppState};
 
 use crate::config::Config;
@@ -21,26 +21,24 @@ pub async fn build_app(config: &Config) -> Result<Router> {
     let pool = connect(&config.database_url).await?;
     run_migrations(&pool).await?;
 
-    
-    
+
+
     let user_repo = Arc::new(PostgresUserRepository::new(pool));
-    
+
     let hasher = Arc::new(BcryptPasswordHasher);
     let issuer = Arc::new(JwtTokenIssuer::new(&config.jwt_secret));
 
-    let register_uc = Arc::new(RegisterUser::new(user_repo.clone(), hasher.clone()));
-    let login_uc = Arc::new(LoginUser::new(user_repo.clone(), hasher, issuer.clone()));
-    let get_profile_uc = Arc::new(GetProfile::new(user_repo));
+    let register_handler = Arc::new(RegisterUserHandler::new(user_repo.clone(), hasher.clone()));
+    let login_handler = Arc::new(LoginUserHandler::new(user_repo.clone(), hasher, issuer.clone()));
+    let get_profile_handler = Arc::new(GetProfileHandler::new(user_repo));
+
 
-    
     let storage_cfg = StorageConfig::from_env()?;
     let store = build_store(&storage_cfg)?;
-    // To inject storage into a use case, clone it into the constructor:
-    // let my_uc = Arc::new(MyUseCase::new(repo, storage.clone()));
     let storage = Arc::new(ObjectStorageAdapter::new(store, &storage_cfg.prefix)?);
-    
 
-    let state = AppState::new(register_uc, login_uc, get_profile_uc, issuer, storage);
+
+    let state = AppState::new(register_handler, login_handler, get_profile_handler, issuer, storage);
 
     let cors = CorsLayer::new()
         .allow_origin(