add abandoned status to distinguish given-up habits from completed ones

Completed and abandoned habits were both lumped under a single terminal
state, making it impossible to tell "finished successfully" apart from
"gave up" when reviewing habit history.

tests/test_api_habits.py

@@ -70,6 +70,18 @@ def test_complete_and_reactivate_habit(auth_client, db_session, test_user):
     assert reactivate_res.json()["status"] == "active"
 
 
+def test_abandon_and_reactivate_habit(auth_client, db_session, test_user):
+    habit = _make_habit(db_session, test_user.id)
+
+    abandon_res = auth_client.post(f"/api/habits/{habit.id}/abandon")
+    assert abandon_res.status_code == 200
+    assert abandon_res.json()["status"] == "abandoned"
+
+    reactivate_res = auth_client.post(f"/api/habits/{habit.id}/reactivate")
+    assert reactivate_res.status_code == 200
+    assert reactivate_res.json()["status"] == "active"
+
+
 def test_reorder_endpoint(auth_client, db_session, test_user):
     a = _make_habit(db_session, test_user.id, name="A")
     b = _make_habit(db_session, test_user.id, name="B")

tests/test_habit_service.py

@@ -86,6 +86,30 @@ def test_complete_and_reactivate_habit(db_session, test_user):
     assert reactivated.completed_at is None
 
 
+def test_abandon_and_reactivate_habit(db_session, test_user):
+    habit = _make_habit(db_session, test_user.id)
+
+    abandoned = habit_service.abandon_habit(db_session, habit)
+    assert abandoned.status == HabitStatus.ABANDONED
+    assert abandoned.abandoned_at is not None
+
+    reactivated = habit_service.reactivate_habit(db_session, habit)
+    assert reactivated.status == HabitStatus.ACTIVE
+    assert reactivated.abandoned_at is None
+
+
+def test_list_habits_filters_by_abandoned_status(db_session, test_user):
+    build = _make_habit(db_session, test_user.id, name="빌드")
+    quit_ = _make_habit(db_session, test_user.id, name="퀴트", habit_type=HabitType.QUIT)
+    habit_service.abandon_habit(db_session, quit_)
+
+    active = habit_service.list_habits(db_session, test_user.id, status=HabitStatus.ACTIVE)
+    assert [h.id for h in active] == [build.id]
+
+    abandoned = habit_service.list_habits(db_session, test_user.id, status=HabitStatus.ABANDONED)
+    assert [h.id for h in abandoned] == [quit_.id]
+
+
 def test_reorder_habits_applies_given_order(db_session, test_user):
     a = _make_habit(db_session, test_user.id, name="A")
     b = _make_habit(db_session, test_user.id, name="B")

tests/test_pages_habits.py

@@ -0,0 +1,45 @@
+from app.models.habit import ALL_WEEKDAYS_MASK, HabitStatus, HabitType
+from app.schemas.habit import HabitCreate
+from app.services import habit_service
+
+
+def _make_habit(db_session, user_id, name="테스트 습관", **overrides):
+    data = HabitCreate(
+        name=name,
+        habit_type=overrides.pop("habit_type", HabitType.BUILD),
+        weekdays_mask=overrides.pop("weekdays_mask", ALL_WEEKDAYS_MASK),
+    )
+    return habit_service.create_habit(db_session, user_id, data)
+
+
+def test_abandon_habit_page_moves_habit_to_abandoned_tab(auth_client, db_session, test_user):
+    habit = _make_habit(db_session, test_user.id, name="포기할 습관")
+
+    response = auth_client.post(f"/habits/{habit.id}/abandon")
+    assert response.status_code == 200
+    assert response.headers["hx-redirect"] == "/habits?tab=build"
+
+    db_session.refresh(habit)
+    assert habit.status == HabitStatus.ABANDONED
+
+    abandoned_tab = auth_client.get("/habits?tab=abandoned")
+    assert "포기할 습관" in abandoned_tab.text
+
+
+def test_abandon_other_users_habit_returns_404(auth_client, db_session, other_user):
+    others_habit = _make_habit(db_session, other_user.id, name="남의 습관")
+
+    response = auth_client.post(f"/habits/{others_habit.id}/abandon")
+    assert response.status_code == 404
+
+
+def test_reactivate_habit_page_redirects_to_abandoned_tab(auth_client, db_session, test_user):
+    habit = _make_habit(db_session, test_user.id, name="다시 시작할 습관")
+    habit_service.abandon_habit(db_session, habit)
+
+    response = auth_client.post(f"/habits/{habit.id}/reactivate")
+    assert response.status_code == 200
+    assert response.headers["hx-redirect"] == "/habits?tab=abandoned"
+
+    db_session.refresh(habit)
+    assert habit.status == HabitStatus.ACTIVE