feat(session): in-place row swap for finish/reset with OOB navbar

Delete stale _session_row_fragment; end_session and reset_session_start
return the canonical row plus an OOB navbar-playtime fragment. Clone keeps
HX-Refresh since it changes row count. Fixes #53.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_session_endpoints.py

@@ -0,0 +1,70 @@
+import pytest
+from django.urls import reverse
+from django.utils import timezone
+
+from games.models import Device, Game, Platform, Session
+
+
+@pytest.fixture
+def auth_client(client, django_user_model):
+    user = django_user_model.objects.create_user(username="u", password="p")
+    client.force_login(user)
+    return client
+
+
+@pytest.fixture
+def running_session(db):
+    platform = Platform.objects.create(name="PC")
+    game = Game.objects.create(name="Hades", platform=platform)
+    device = Device.objects.create(name="Deck")
+    return Session.objects.create(
+        game=game, device=device, timestamp_start=timezone.now()
+    )
+
+
+def test_end_session_htmx_returns_row_and_oob_navbar(auth_client, running_session):
+    url = reverse("games:list_sessions_end_session", args=[running_session.pk])
+    response = auth_client.get(url, HTTP_HX_REQUEST="true")
+    body = response.content.decode()
+    assert response.status_code == 200
+    assert f'id="session-row-{running_session.pk}"' in body
+    assert 'id="navbar-playtime"' in body
+    assert 'hx-swap-oob="true"' in body
+    running_session.refresh_from_db()
+    assert running_session.timestamp_end is not None
+
+
+def test_reset_session_start_htmx_returns_row_no_refresh_header(
+    auth_client, running_session
+):
+    original_start = running_session.timestamp_start
+    url = reverse(
+        "games:list_sessions_reset_session_start", args=[running_session.pk]
+    )
+    response = auth_client.get(url, HTTP_HX_REQUEST="true")
+    body = response.content.decode()
+    assert response.status_code == 200
+    assert f'id="session-row-{running_session.pk}"' in body
+    assert 'id="navbar-playtime"' in body
+    assert "HX-Refresh" not in response.headers
+    running_session.refresh_from_db()
+    assert running_session.timestamp_start > original_start
+
+
+def test_clone_htmx_returns_hx_refresh(auth_client, running_session):
+    url = reverse(
+        "games:list_sessions_start_session_from_session",
+        args=[running_session.pk],
+    )
+    before = Session.objects.count()
+    response = auth_client.get(url, HTTP_HX_REQUEST="true")
+    assert response.status_code == 204
+    assert response.headers.get("HX-Refresh") == "true"
+    assert Session.objects.count() == before + 1
+
+
+def test_end_session_non_htmx_redirects(auth_client, running_session):
+    url = reverse("games:list_sessions_end_session", args=[running_session.pk])
+    response = auth_client.get(url)
+    assert response.status_code == 302
+    assert response.url == reverse("games:list_sessions")