add 400+ unit tests for domain and application layers

Extract ReviewLogger trait to decouple import/integrations
from diary::log_review (cross-module coupling smell).

Add in-memory fakes for all repository ports, enabling
isolated testing of every use case module without a database.

Coverage: domain+application 22% → 80%, 427 tests.

crates/application/src/wrapup/tests/delete.rs

@@ -0,0 +1,45 @@
+use std::sync::Arc;
+
+use chrono::NaiveDate;
+use domain::models::wrapup::{WrapUpRecord, WrapUpStatus};
+use domain::testing::InMemoryWrapUpRepository;
+use domain::value_objects::WrapUpId;
+
+use crate::test_helpers::TestContextBuilder;
+use crate::wrapup::delete;
+
+#[tokio::test]
+async fn deletes_existing_wrapup() {
+    let repo = InMemoryWrapUpRepository::new();
+    let id = WrapUpId::generate();
+    repo.store.lock().unwrap().push(WrapUpRecord {
+        id: id.clone(),
+        user_id: None,
+        start_date: NaiveDate::from_ymd_opt(2024, 1, 1).unwrap(),
+        end_date: NaiveDate::from_ymd_opt(2025, 1, 1).unwrap(),
+        status: WrapUpStatus::Ready,
+        report: None,
+        error_message: None,
+        created_at: chrono::Utc::now().naive_utc(),
+        completed_at: None,
+    });
+
+    let ctx = TestContextBuilder::new().build();
+    let ctx = crate::context::AppContext {
+        repos: crate::context::Repositories {
+            wrapup_repo: Arc::clone(&repo) as _,
+            ..ctx.repos
+        },
+        ..ctx
+    };
+
+    delete::execute(&ctx, id).await.unwrap();
+    assert_eq!(repo.store.lock().unwrap().len(), 0);
+}
+
+#[tokio::test]
+async fn fails_when_not_found() {
+    let ctx = TestContextBuilder::new().build();
+    let result = delete::execute(&ctx, WrapUpId::generate()).await;
+    assert!(result.is_err());
+}