Coordinator polls the API snapshot and rebuilds the sensors' data

Feature 18: the shared coordinator's refresh pass now fetches
GET /api/v1/panel/snapshot through the NestQuestApiClient and
reconstructs the exact core dataclasses (NestQuestSnapshot,
ChildDaySnapshot, QuestInstanceView) the Feature 10 entities read, so
sensor.py and binary_sensor.py are untouched and every entity_id and
attribute payload keeps its shape.

Why: the integration becomes an API client of the NestQuest service
instead of a second reader of the SQLite file, and the panel cards and
the four blueprints keep working without changes.

- snapshot_from_api_payload maps the route's JSON back onto the
  dataclasses field by field (state 'completed' -> 'done' so
  instance_payload renders 'completed' again; counts, presence,
  next_present, overdue, on_time, completed_at pass through verbatim;
  due_date is stamped from today_iso, the only date the route serves).
- The panel payload omits missed instances (D-009), so
  admin_instances can no longer carry missed rows — the admin surface
  for missed quests is the PWA reading the API directly. Documented in
  the module docstring and pinned by tests.
- An unconfigured panel token (the shipped default) gets a typed-error
  stub instead of a construction crash: setup succeeds, the first
  refresh fails cleanly, entities come up unavailable and HA's retry
  cycle applies. Fetch failures log the typed error and mark the
  entities unavailable while data keeps its last good snapshot.
- The runtime record registers before the first refresh so the refresh
  path always finds the live entry state; the update interval and the
  serialized forced-refresh behaviour are unchanged.
- Tests: a fixture snapshot drives the coordinator (stub client, no
  network) asserting per-child values, household rollups, cycle day,
  and the exact instance payload shape, plus unconfigured and
  failed-fetch cases; DB-seeded tests ride a lazy local-snapshot
  client through the same JSON path.

tests/conftest.py

@@ -52,6 +52,7 @@ _HA_MODULES = (
     "homeassistant.helpers.entity",
     "homeassistant.helpers.event",
     "homeassistant.helpers.update_coordinator",
+    "homeassistant.helpers.aiohttp_client",
     "homeassistant.components",
     "homeassistant.components.sensor",
     "homeassistant.components.binary_sensor",
@@ -99,6 +100,7 @@ for _parent, _child in (
     ("homeassistant.helpers", "entity"),
     ("homeassistant.helpers", "event"),
     ("homeassistant.helpers", "update_coordinator"),
+    ("homeassistant.helpers", "aiohttp_client"),
     ("homeassistant", "components"),
     ("homeassistant.components", "sensor"),
     ("homeassistant.components", "binary_sensor"),
@@ -700,6 +702,125 @@ def wire_entry_to_registry(entry, registry: ListenerRegistry):
     return entry
 
 
+class LazyLocalSnapshotClient:
+    """A test client that serves the snapshot built LOCALLY.
+
+    Feature 18 moved the coordinator's refresh onto the API service's
+    panel snapshot, but most integration tests still seed the local
+    database directly (the DB removal is a later task).  This stub
+    bridges the two: ``get_snapshot`` resolves the entry's runtime
+    record (its database and settings) and runs the SAME pure core
+    builder the API route runs
+    (:func:`~custom_components.nestquest.core.snapshot.build_snapshot`),
+    shaping the payload exactly like ``api/routes_panel.py`` —
+    instances via ``instance_payload(include_missed=False)`` — so the
+    coordinator reconstructs from a byte-identical payload without any
+    network or FastAPI machinery.
+
+    The resolution is LAZY on purpose: the coordinator's factory runs
+    mid-setup, before the runtime record exists, so the first refresh
+    (and any refresh while the entry is torn down) serves an EMPTY but
+    valid snapshot; every later refresh reads the seeded database.
+    """
+
+    def __init__(self, hass, entry_id: str) -> None:
+        self._hass = hass
+        self._entry_id = entry_id
+        self.calls = 0
+
+    async def get_snapshot(self):
+        import datetime
+        import zoneinfo
+
+        from custom_components.nestquest.const import DOMAIN as NQ_DOMAIN
+        from custom_components.nestquest.core import snapshot as core_snapshot
+
+        self.calls += 1
+        runtime = self._hass.data.get(NQ_DOMAIN, {}).get(self._entry_id)
+        database = getattr(runtime, "database", None)
+        if database is None or not getattr(database, "connected", True):
+            return {
+                "today_iso": datetime.date.today().isoformat(),
+                "cycle_day": 0,
+                "children": [],
+            }
+        settings = getattr(runtime, "settings", None)
+        # The HA-LOCAL now, the same single clock read the production
+        # coordinator used to hand the builder: the hass stub's
+        # configured time zone, never the host clock.
+        now = datetime.datetime.now(
+            zoneinfo.ZoneInfo(self._hass.config.time_zone)
+        )
+        snapshot = await core_snapshot.build_snapshot(database, settings, now)
+        return {
+            "today_iso": snapshot.today_iso,
+            "cycle_day": snapshot.cycle_day,
+            "children": [
+                {
+                    "child_id": child.child_id,
+                    "child_name": child.child_name,
+                    "present": child.present,
+                    "next_present": child.next_present,
+                    "due_today": child.due_today,
+                    "completed_today": child.completed_today,
+                    "remaining_today": child.remaining_today,
+                    "completion_pct": child.completion_pct,
+                    "instances": core_snapshot.instance_payload(
+                        child.instances, include_missed=False
+                    ),
+                }
+                for child in snapshot.children
+            ],
+        }
+
+
+@pytest.fixture(autouse=True)
+def coordinator_serves_local_snapshot():
+    """Default every test entry's coordinator to the local-snapshot client.
+
+    The integration's setup builds its API client through
+    ``coordinator_client_from_entry``; the fixture swaps that factory
+    for a test one handing out :class:`LazyLocalSnapshotClient` (so
+    DB-seeded tests exercise the coordinator's API path against local
+    data).  Tests that script their own client register it with
+    :func:`set_coordinator_client`, which the factory honours first.
+    """
+    import custom_components.nestquest as nq_mod
+    import custom_components.nestquest.coordinator as coordinator_module
+    from custom_components.nestquest.coordinator import (
+        coordinator_client_from_entry as production_factory,
+    )
+
+    _COORDINATOR_CLIENT_OVERRIDES = (
+        coordinator_module._COORDINATOR_CLIENT_OVERRIDES
+    )
+
+    def _factory(hass, entry, **kwargs):
+        override = _COORDINATOR_CLIENT_OVERRIDES.get(entry.entry_id)
+        if override is not None:
+            return override
+        return LazyLocalSnapshotClient(hass, entry.entry_id)
+
+    import unittest.mock as mock
+
+    _COORDINATOR_CLIENT_OVERRIDES.clear()
+    patcher = mock.patch.object(
+        nq_mod, "coordinator_client_from_entry", _factory
+    )
+    patcher.start()
+    yield
+    patcher.stop()
+    _COORDINATOR_CLIENT_OVERRIDES.clear()
+
+
+def set_coordinator_client(entry, client):
+    """Register a scripted client for ``entry``'s coordinator factory."""
+    import custom_components.nestquest.coordinator as coordinator_module
+
+    coordinator_module._COORDINATOR_CLIENT_OVERRIDES[entry.entry_id] = client
+    return client
+
+
 class _HassNamespace(SimpleNamespace):
     """SimpleNamespace subclass so the hass stub can hold weak references."""
 

tests/test_coordinator.py

@@ -1,263 +1,452 @@
-"""Tests for the shared NestQuest coordinator (Feature 10, task 1)."""
+"""Tests for the shared NestQuest coordinator (Feature 10, Feature 18).
+
+The coordinator now polls the API service's panel snapshot through the
+API client (Feature 18) and reconstructs the core snapshot dataclasses
+every entity reads.  The tests stub the client — NO network, NO aiohttp
+— with a FIXTURE snapshot payload (the documented shape of the Feature
+16 snapshot route, ``api/routes_panel.py``) and assert the
+reconstruction: per-child counts and presence, the instance views
+(``completed`` mapped back to ``done``), the household rollups, the
+cycle day, and the unconfigured / failed-fetch behaviour.
+"""
 from __future__ import annotations
 
 import datetime
 
 import pytest
 
-from conftest import wire_entry_to_registry
+from conftest import set_coordinator_client, wire_entry_to_registry
 
 from custom_components.nestquest import async_setup_entry, async_unload_entry
-from custom_components.nestquest.children import (
-    create_child,
-    list_children,
-    set_child_active,
+from custom_components.nestquest.api_client import (
+    NestQuestApiClient,
+    NestQuestApiError,
 )
-from custom_components.nestquest.completion import complete_instance
 from custom_components.nestquest.const import (
     CONF_UPDATE_INTERVAL,
     DEFAULT_UPDATE_INTERVAL,
-    DEFAULT_HORIZON_DAYS,
     DOMAIN,
 )
-from custom_components.nestquest.coordinator import NestQuestCoordinator
-from custom_components.nestquest.dao_presence import PresenceSchedulesDao
-from custom_components.nestquest.materialize import materialize
-from custom_components.nestquest.quest_definitions import (
-    create_quest_definition,
+from custom_components.nestquest.coordinator import (
+    NestQuestCoordinator,
+    coordinator_client_from_entry,
+    snapshot_from_api_payload,
 )
-from custom_components.nestquest.recurrence import ScheduleRule
-
-ADMIN_CTX = {"user_id": "admin-1"}
+from custom_components.nestquest.core.snapshot import instance_payload
 
 
 def _today_iso() -> str:
     return datetime.date.today().isoformat()
 
 
-async def _seed_day(database, *, completed: bool = False) -> None:
-    """Two active children + one inactive, one daily definition each."""
-    await create_child(database, "Ada")
-    await create_child(database, "Bo")
-    inactive = await create_child(database, "Ghost")
-    await set_child_active(database, inactive.id, False)
-    today = _today_iso()
-    await create_quest_definition(
-        database,
-        "Brush teeth",
-        ScheduleRule.from_dict({"rule_type": "daily", "start_date": today}),
-        [child.id for child in await list_children(database, active_only=True)],
-        ["morning"],
+class StubSnapshotClient:
+    """A no-network stand-in for the API client's snapshot surface.
+
+    Answers ``get_snapshot()`` from a scripted queue of outcomes — a
+    payload dict or an exception per call, consumed in order — and
+    records every call, so each test drives exactly one refresh.
+    """
+
+    def __init__(self, *outcomes) -> None:
+        self.calls = 0
+        self._outcomes = list(outcomes)
+        self._last = outcomes[-1] if outcomes else None
+
+    async def get_snapshot(self):
+        self.calls += 1
+        if not self._outcomes:
+            # Re-serve the last outcome: setup's first refresh and the
+            # test's explicit pass both poll the same scripted state.
+            outcome = self._last
+        else:
+            outcome = self._outcomes.pop(0)
+            self._last = outcome
+        if isinstance(outcome, BaseException):
+            raise outcome
+        return outcome
+
+
+#: A fixture panel snapshot (the documented Feature 16 route shape):
+#: two children — Ada owes one, owes none of it yet, is away today with
+#: a returns date; Bo completed his only quest and is present.
+FIXTURE_SNAPSHOT = {
+    "today_iso": _today_iso(),
+    "cycle_day": 3,
+    "children": [
+        {
+            "child_id": 1,
+            "child_name": "Ada",
+            "present": False,
+            "next_present": "2026-09-24",
+            "due_today": 2,
+            "completed_today": 1,
+            "remaining_today": 1,
+            "completion_pct": 50,
+            "instances": [
+                {
+                    "id": 7,
+                    "definition_id": 3,
+                    "child_id": 1,
+                    "title": "Brush teeth",
+                    "icon": "🦷",
+                    "window": "morning",
+                    "due_time": "08:00",
+                    "state": "completed",
+                    "overdue": False,
+                    "completed_at": f"{_today_iso()}T07:55:00+00:00",
+                    "on_time": True,
+                },
+                {
+                    "id": 8,
+                    "definition_id": 3,
+                    "child_id": 1,
+                    "title": "Pack bag",
+                    "icon": None,
+                    "window": "morning",
+                    "due_time": "10:00",
+                    "state": "open",
+                    "overdue": True,
+                    "completed_at": None,
+                    "on_time": None,
+                },
+            ],
+        },
+        {
+            "child_id": 2,
+            "child_name": "Bo",
+            "present": True,
+            "next_present": None,
+            "due_today": 1,
+            "completed_today": 1,
+            "remaining_today": 0,
+            "completion_pct": 100,
+            "instances": [
+                {
+                    "id": 9,
+                    "definition_id": 4,
+                    "child_id": 2,
+                    "title": "Make bed",
+                    "icon": "🛏",
+                    "window": "morning",
+                    "due_time": "07:30",
+                    "state": "completed",
+                    "overdue": False,
+                    "completed_at": f"{_today_iso()}T07:31:00+00:00",
+                    "on_time": True,
+                }
+            ],
+        },
+    ],
+}
+
+
+async def _wire_entry(hass, make_entry, client, options=None):
+    """Build an entry whose coordinator uses the scripted API client.
+
+    The client is registered with the conftest override BEFORE setup:
+    the first refresh at setup already polls the snapshot, so the
+    platform setup sees real data and creates the whole entity set.
+    """
+    from conftest import set_coordinator_client
+
+    entry = wire_entry_to_registry(
+        make_entry(
+            options=options,
+            data={"api_base_url": "http://api.test:8000", "panel_token": "tok"},
+        ),
+        hass.registry,
     )
-    end = (
-        datetime.date.today() + datetime.timedelta(days=DEFAULT_HORIZON_DAYS)
-    ).isoformat()
-    await materialize(database, today, end, today=datetime.date.today())
-
-
-async def test_coordinator_snapshot_counts_and_states(hass, make_entry) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
+    set_coordinator_client(entry, client)
     assert await async_setup_entry(hass, entry) is True
     coordinator = entry.runtime_data.coordinator
-    assert coordinator is not None
-    database = entry.runtime_data.database
-    await _seed_day(database)
+    assert coordinator.api_client is client
+    return entry, coordinator
 
+
+async def test_coordinator_builds_snapshot_from_fixture(hass, make_entry) -> None:
+    """One refresh = one snapshot GET; the fixture's values land on the
+    snapshot the entities read, per child and household-wide."""
+    client = StubSnapshotClient(FIXTURE_SNAPSHOT)
+    _entry, coordinator = await _wire_entry(hass, make_entry, client)
+    calls_after_setup = client.calls
     snapshot = await coordinator._async_update_data()
+
+    assert client.calls == calls_after_setup + 1
     assert snapshot.today_iso == _today_iso()
-    assert len(snapshot.children) == 2, "inactive child must be absent"
-    by_name = {child.child_name: child for child in snapshot.children}
-    ada = by_name["Ada"]
-    assert ada.due_today == 1
-    assert ada.completed_today == 0
+    assert snapshot.cycle_day == 3
+    assert len(snapshot.children) == 2
+
+    ada, bo = snapshot.children
+    assert (ada.child_id, ada.child_name) == (1, "Ada")
+    assert ada.due_today == 2
+    assert ada.completed_today == 1
     assert ada.remaining_today == 1
-    assert ada.completion_pct == 0
-    instance = ada.instances[0]
-    assert instance.state == "open"
-    assert instance.overdue is False
-    assert instance.title == "Brush teeth"
-    assert instance.window == "morning"
-    assert ada.present is True, "no schedule means present every day"
-    assert ada.next_present is None, "present child has no returns date"
-    assert snapshot.cycle_day == 0, "no schedule anywhere"
+    assert ada.completion_pct == 50
+    assert ada.present is False
+    assert ada.next_present == "2026-09-24"
+
+    done_view, open_view = ada.instances
+    assert done_view.instance_id == 7
+    assert done_view.title == "Brush teeth"
+    assert done_view.icon == "🦷"
+    assert done_view.window == "morning"
+    assert done_view.due_time == "08:00"
+    assert done_view.due_date == _today_iso()
+    # The API's "completed" maps back to the core view's "done".
+    assert done_view.state == "done"
+    assert done_view.overdue is False
+    assert done_view.completed_at == f"{_today_iso()}T07:55:00+00:00"
+    assert done_view.was_on_time is True
+
+    assert open_view.state == "open"
+    assert open_view.overdue is True
+    assert open_view.completed_at is None
+    assert open_view.was_on_time is None
+
+    assert (bo.child_id, bo.child_name) == (2, "Bo")
+    assert bo.due_today == 1
+    assert bo.completed_today == 1
+    assert bo.remaining_today == 0
+    assert bo.completion_pct == 100
+    assert bo.present is True
+    assert bo.next_present is None
+
+    # Household rollups: the sums the household sensors compute.
+    assert sum(child.due_today for child in snapshot.children) == 3
+    assert sum(child.completed_today for child in snapshot.children) == 2
+    assert sum(child.remaining_today for child in snapshot.children) == 1
 
 
-async def test_coordinator_next_present_for_away_child(
-    hass, make_entry
+async def test_coordinator_refresh_publishes_to_listeners(hass, make_entry) -> None:
+    """The refresh pass notifies listeners and reports success — the
+    ONE refresh pass every entity reads from."""
+    client = StubSnapshotClient(FIXTURE_SNAPSHOT)
+    _entry, coordinator = await _wire_entry(hass, make_entry, client)
+    called = []
+    coordinator.async_add_listener(lambda: called.append("entity"))
+    await coordinator.async_refresh()
+    assert called == ["entity"]
+    assert coordinator.last_update_success is True
+    assert coordinator.data is not None
+    assert coordinator.data.children[0].child_name == "Ada"
+
+
+async def test_instance_payload_shape_is_unchanged(hass, make_entry) -> None:
+    """The per-child instance attribute payload the due-today sensor
+    emits keeps its exact documented shape, and admin_instances now
+    equals instances (the API omits missed rows — D-009; the admin
+    surface for missed quests is the PWA)."""
+    client = StubSnapshotClient(FIXTURE_SNAPSHOT)
+    _entry, coordinator = await _wire_entry(hass, make_entry, client)
+    snapshot = await coordinator._async_update_data()
+    ada = snapshot.children[0]
+
+    panel = instance_payload(ada.instances, include_missed=False)
+    assert panel == [
+        {
+            "id": 7,
+            "definition_id": 3,
+            "child_id": 1,
+            "title": "Brush teeth",
+            "icon": "🦷",
+            "window": "morning",
+            "due_time": "08:00",
+            "state": "completed",
+            "overdue": False,
+            "completed_at": f"{_today_iso()}T07:55:00+00:00",
+            "on_time": True,
+        },
+        {
+            "id": 8,
+            "definition_id": 3,
+            "child_id": 1,
+            "title": "Pack bag",
+            "icon": None,
+            "window": "morning",
+            "due_time": "10:00",
+            "state": "open",
+            "overdue": True,
+            "completed_at": None,
+            "on_time": None,
+        },
+    ]
+    # The API payload omits missed rows, so include_missed cannot
+    # re-add them: admin_instances == instances, byte for byte.
+    assert instance_payload(ada.instances, include_missed=True) == panel
+
+
+async def test_coordinator_entities_read_the_api_snapshot(hass, make_entry) -> None:
+    """The registered sensors and binary sensors read the rebuilt
+    snapshot: entity values come from the fixture, with the SAME
+    entity_ids as ever."""
+    client = StubSnapshotClient(FIXTURE_SNAPSHOT)
+    entry, coordinator = await _wire_entry(hass, make_entry, client)
+    await coordinator.async_refresh()
+
+    ada_due = hass.entities[f"{DOMAIN}_child_1_quests_due_today"]
+    assert ada_due.native_value == 2
+    attributes = ada_due.extra_state_attributes
+    assert attributes["child_id"] == 1
+    assert attributes["child_name"] == "Ada"
+    assert attributes["present"] is False
+    assert [row["id"] for row in attributes["instances"]] == [7, 8]
+
+    assert (
+        hass.entities[f"{DOMAIN}_child_1_quests_completed_today"].native_value
+        == 1
+    )
+    assert (
+        hass.entities[f"{DOMAIN}_child_1_quests_remaining_today"].native_value
+        == 1
+    )
+    assert (
+        hass.entities[f"{DOMAIN}_child_1_completion_pct_today"].native_value
+        == 50
+    )
+    assert hass.entities[f"{DOMAIN}_child_1_next_quest"].native_value == (
+        "Pack bag"
+    )
+    # Ada owes one still: not all done; away today.
+    assert hass.entities[f"{DOMAIN}_child_1_all_done"].is_on is False
+    assert hass.entities[f"{DOMAIN}_child_1_present_today"].is_on is False
+
+    assert (
+        hass.entities[f"{DOMAIN}_child_2_completion_pct_today"].native_value
+        == 100
+    )
+    # Bo had a quest and owes none of it: all done, present today.
+    assert hass.entities[f"{DOMAIN}_child_2_all_done"].is_on is True
+    assert hass.entities[f"{DOMAIN}_child_2_present_today"].is_on is True
+    bo_attributes = hass.entities[
+        f"{DOMAIN}_child_2_present_today"
+    ].extra_state_attributes
+    assert bo_attributes["next_present"] is None
+
+    assert (
+        hass.entities[f"{DOMAIN}_household_quests_due_today"].native_value == 3
+    )
+    assert (
+        hass.entities[f"{DOMAIN}_household_quests_completed_today"].native_value
+        == 2
+    )
+    cycle = hass.entities[f"{DOMAIN}_cycle_day"]
+    assert cycle.native_value == 3
+    assert cycle.extra_state_attributes == {
+        "cycle_day": 3,
+        "today": _today_iso(),
+    }
+
+    await async_unload_entry(hass, entry)
+
+
+async def test_coordinator_failed_fetch_marks_unavailable(hass, make_entry) -> None:
+    """A failed fetch (transport failure or non-2xx — both typed) raises
+    out of the refresh pass: last_update_success goes False (entities
+    unavailable), data keeps its last good value, and the typed error is
+    logged, never swallowed."""
+    error = NestQuestApiError(
+        "NestQuest API GET /api/v1/panel/snapshot failed with HTTP 503",
+        status=503,
+    )
+    # The stub serves the good snapshot for setup's first refresh, then
+    # the scripted failure.
+    client = StubSnapshotClient(FIXTURE_SNAPSHOT, error)
+    _entry, coordinator = await _wire_entry(hass, make_entry, client)
+    # First refresh (at setup) served the good snapshot.
+    assert coordinator.data is not None
+    assert coordinator.last_update_success is True
+
+    # The next pass hits the scripted failure: it raises out of the
+    # refresh, marks the entities unavailable, and keeps the last GOOD
+    # snapshot as data.
+    with pytest.raises(NestQuestApiError):
+        await coordinator.async_refresh()
+    assert coordinator.last_update_success is False
+    assert coordinator.data.children[0].child_name == "Ada"
+
+
+async def test_coordinator_unconfigured_api_does_not_crash_setup(
+    hass, make_entry, monkeypatch
 ) -> None:
-    """A child absent today carries the ISO date of their next present
-    day; an always-absent pattern carries None instead."""
+    """An entry with no panel token set up fine: the coordinator gets
+    the typed-error stub, the first refresh fails cleanly (unavailable
+    entities), and setup does NOT crash."""
+    # Restore the production factory: the conftest default would serve
+    # the local snapshot, but this test exercises the token guard.
+    import custom_components.nestquest as nq
+
+    monkeypatch.setattr(
+        nq, "coordinator_client_from_entry", coordinator_client_from_entry
+    )
     entry = wire_entry_to_registry(make_entry(), hass.registry)
     assert await async_setup_entry(hass, entry) is True
     coordinator = entry.runtime_data.coordinator
-    database = entry.runtime_data.database
-    await create_child(database, "Ada")
-    ada = (await list_children(database))[0]
-    today = datetime.date.today()
-    pattern = ",".join(
-        str(day) for day in range(7) if day != today.weekday()
-    )
-    await PresenceSchedulesDao(database).upsert_by_child(
-        ada.id, 1, today.isoformat(), pattern
-    )
-    await create_child(database, "Bo")
-    bo = (await list_children(database))[1]
-    await PresenceSchedulesDao(database).upsert_by_child(
-        bo.id, 1, today.isoformat(), ""
-    )
-    snapshot = await coordinator._async_update_data()
-    by_name = {child.child_name: child for child in snapshot.children}
-    assert by_name["Ada"].present is False
-    assert by_name["Ada"].next_present == (
-        today + datetime.timedelta(days=1)
-    ).isoformat()
-    assert by_name["Bo"].present is False
-    assert by_name["Bo"].next_present is None
+    from custom_components.nestquest.coordinator import _UnconfiguredApiClient
+
+    assert isinstance(coordinator.api_client, _UnconfiguredApiClient)
+    # A real NestQuestApiClient was never built (it would ValueError).
+    assert not isinstance(coordinator.api_client, NestQuestApiClient)
+    assert coordinator.last_update_success is False
+    assert coordinator.data is None
+    with pytest.raises(NestQuestApiError, match="not configured"):
+        await coordinator.async_refresh()
 
 
-async def test_coordinator_reflects_completion_and_uncompletion(
+async def test_coordinator_configured_token_builds_real_client(
     hass, make_entry
 ) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
+    """An entry WITH a panel token builds the real client through the
+    production factory (a stub transport injected via session_factory,
+    the mock-only harness having no aiohttp module to hand in), and the
+    coordinator's refresh polls the snapshot route end to end."""
+    import json as json_module
+
+    class _OneShotSession:
+        """A session-shaped stub answering every request with the fixture."""
+
+        def __init__(self, payload) -> None:
+            self._body = json_module.dumps(payload)
+
+        def request(self, method, url, **kwargs):
+            body = self._body
+
+            class _Response:
+                def __init__(self) -> None:
+                    self.status = 200
+
+                async def text(self):
+                    return body
+
+            class _Context:
+                async def __aenter__(self):
+                    return _Response()
+
+                async def __aexit__(self, *exc):
+                    return False
+
+            return _Context()
+
+    def _session_factory(_hass):
+        return _OneShotSession(FIXTURE_SNAPSHOT)
+
+    entry = wire_entry_to_registry(
+        make_entry(
+            data={"api_base_url": "http://api.test:8000", "panel_token": "tok"}
+        ),
+        hass.registry,
+    )
+    real_client = coordinator_client_from_entry(
+        hass, entry, session_factory=_session_factory
+    )
+    assert isinstance(real_client, NestQuestApiClient)
+
+    set_coordinator_client(entry, real_client)
     assert await async_setup_entry(hass, entry) is True
     coordinator = entry.runtime_data.coordinator
-    database = entry.runtime_data.database
-    await _seed_day(database)
-    ada = (
-        await coordinator._async_update_data()
-    ).children[0]
-    instance_id = ada.instances[0].instance_id
-
-    await complete_instance(
-        database,
-        instance_id,
-        actor_source="panel",
-        actor_child_id=ada.child_id,
-    )
-    snapshot = await coordinator._async_update_data()
-    child = snapshot.children[0]
-    assert child.completed_today == 1
-    assert child.remaining_today == 0
-    assert child.completion_pct == 100
-    view = child.instances[0]
-    assert view.state == "done"
-    assert view.completed_at is not None
-    assert view.was_on_time is not None
-
-    from custom_components.nestquest.completion import uncomplete_instance
-
-    await uncomplete_instance(
-        database, instance_id, actor_source="user", actor_user_id="admin-1"
-    )
-    snapshot = await coordinator._async_update_data()
-    child = snapshot.children[0]
-    assert child.completed_today == 0
-    assert child.remaining_today == 1
-    assert child.instances[0].state == "open"
-
-
-async def test_coordinator_zero_quests_reports_full_percentage(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    await create_child(entry.runtime_data.database, "Ada")
-    snapshot = await coordinator._async_update_data()
-    child = snapshot.children[0]
-    assert child.due_today == 0
-    assert child.completion_pct == 100, "zero quests is a perfect day"
-    assert child.instances == ()
-
-
-async def test_coordinator_cycle_day_from_first_scheduled_child(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    database = entry.runtime_data.database
-    await create_child(database, "Ada")
-    ada = (await list_children(database))[0]
-    today = datetime.date.today()
-    # A 2-week cycle anchored 3 days ago: today is day 4.
-    anchor = today - datetime.timedelta(days=3)
-    await PresenceSchedulesDao(database).upsert_by_child(
-        ada.id, 2, anchor.isoformat(), "0,1,2,3,4,5,6|"
-    )
-    snapshot = await coordinator._async_update_data()
-    assert snapshot.cycle_day == 4
-
-
-async def test_coordinator_presence_resolves_schedule_and_override(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    database = entry.runtime_data.database
-    await create_child(database, "Ada")
-    ada = (await list_children(database))[0]
-    today = datetime.date.today()
-    # Scheduled absent today (empty weekday set for this cycle week).
-    await PresenceSchedulesDao(database).upsert_by_child(
-        ada.id, 1, today.isoformat(), ""
-    )
-    snapshot = await coordinator._async_update_data()
-    assert snapshot.children[0].present is False
-
-    # An override beats the pattern.
-    from custom_components.nestquest.dao_presence import (
-        PresenceOverridesDao,
-    )
-
-    await PresenceOverridesDao(database).create(
-        ada.id, today.isoformat(), today.isoformat(), True
-    )
-    snapshot = await coordinator._async_update_data()
-    assert snapshot.children[0].present is True
-
-
-async def test_coordinator_next_present_honours_future_override(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    database = entry.runtime_data.database
-    await create_child(database, "Ada")
-    ada = (await list_children(database))[0]
-    today = datetime.date.today()
-    tomorrow = today + datetime.timedelta(days=1)
-    # Scheduled present tomorrow (single-day cycle, weekday set set below
-    # covers every day), but overridden absent tomorrow.
-    await PresenceSchedulesDao(database).upsert_by_child(
-        ada.id, 1, today.isoformat(), "0,1,2,3,4,5,6"
-    )
-    from custom_components.nestquest.dao_presence import (
-        PresenceOverridesDao,
-    )
-
-    await PresenceOverridesDao(database).create(
-        ada.id, tomorrow.isoformat(), tomorrow.isoformat(), False
-    )
-    snapshot = await coordinator._async_update_data()
-    child = snapshot.children[0]
-    assert child.present is True
-    assert child.next_present != tomorrow.isoformat(), (
-        "a future absent override must remove tomorrow from the preview"
-    )
-
-
-async def test_coordinator_derives_missed_for_past_due_open(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    snapshot = await coordinator._async_update_data()
-    # No children: empty but valid snapshot.
-    assert snapshot.children == ()
+    assert isinstance(coordinator.api_client, NestQuestApiClient)
+    # The real client polls the stub transport; the snapshot lands.
+    await coordinator.async_refresh()
+    assert coordinator.data.children[0].child_name == "Ada"
 
 
 async def test_setup_creates_coordinator_with_configured_interval(
@@ -270,12 +459,9 @@ async def test_setup_creates_coordinator_with_configured_interval(
     coordinator = entry.runtime_data.coordinator
     assert isinstance(coordinator, NestQuestCoordinator)
     assert coordinator.update_interval == datetime.timedelta(seconds=60)
-    assert coordinator.data is not None, "first refresh ran at setup"
 
 
-async def test_setup_defaults_to_five_minute_interval(
-    hass, make_entry
-) -> None:
+async def test_setup_defaults_to_five_minute_interval(hass, make_entry) -> None:
     entry = wire_entry_to_registry(make_entry(), hass.registry)
     assert await async_setup_entry(hass, entry) is True
     coordinator = entry.runtime_data.coordinator
@@ -298,24 +484,11 @@ async def test_unload_shuts_coordinator_down(hass, make_entry) -> None:
     assert torn_down == [coordinator]
 
 
-async def test_coordinator_notifies_listeners_on_refresh(
-    hass, make_entry
-) -> None:
-    entry = wire_entry_to_registry(make_entry(), hass.registry)
-    assert await async_setup_entry(hass, entry) is True
-    coordinator = entry.runtime_data.coordinator
-    called = []
-    coordinator.async_add_listener(lambda: called.append("entity"))
-    await coordinator.async_refresh()
-    assert called == ["entity"]
-    assert coordinator.last_update_success is True
-
-
 async def test_failed_first_refresh_shuts_coordinator_down(
     hass, make_entry, monkeypatch
 ) -> None:
     """A setup failure after coordinator creation must not leak its
-    listeners against the database the except path closes."""
+    listeners."""
     from custom_components.nestquest import async_setup_entry
     import custom_components.nestquest.coordinator as coordinator_module
 
@@ -344,3 +517,14 @@ async def test_failed_first_refresh_shuts_coordinator_down(
         await async_setup_entry(hass, entry)
     assert shutdown_calls == [entry.entry_id]
     assert getattr(entry, "runtime_data", None) is None
+
+
+async def test_snapshot_from_api_payload_empty_household() -> None:
+    """An empty household (no children) is a valid snapshot: empty
+    children tuple, cycle day passes through."""
+    snapshot = snapshot_from_api_payload(
+        {"today_iso": "2026-09-23", "cycle_day": 0, "children": []}
+    )
+    assert snapshot.children == ()
+    assert snapshot.cycle_day == 0
+    assert snapshot.today_iso == "2026-09-23"

tests/test_core_snapshot.py

@@ -123,9 +123,11 @@ async def test_build_snapshot_explicit_values(hass, make_entry, monkeypatch) ->
     database = entry.runtime_data.database
     settings = entry.runtime_data.settings
 
-    # Single clock read for the seed/snapshot anchor (no midnight skew).
-    today = coordinator._local_now().date()
+    # Single clock read for the seed/snapshot anchor (no midnight skew);
+    # the coordinator no longer owns a clock read (the API serves the
+    # snapshot), so the test resolves the HA-local zone directly.
     time_zone = ZoneInfo(hass.config.time_zone)
+    today = datetime.datetime.now(time_zone).date()
     # Pin the build instant at 12:00 local: past Ada's 10:00 due time
     # (overdue) and before Bo's 17:00, and the completion moment for Bo.
     pinned_now = datetime.datetime(
@@ -294,13 +296,38 @@ async def test_build_snapshot_explicit_values(hass, make_entry, monkeypatch) ->
         == "missed"
     )
 
-    # REQUIRED wrapper tie-in: the coordinator's _async_update_data is a
-    # thin WRAPPER over build_snapshot, so pinning its clock to the SAME
-    # pinned_now the builder was called with must reproduce the builder's
-    # snapshot byte-for-byte.  The dataclasses are frozen, so == is a full
-    # deep compare — a wrapper that mis-passed today vs now, or stopped
-    # calling the builder, would diverge here even though the literal
-    # assertions above still pass.
-    monkeypatch.setattr(coordinator, "_local_now", lambda: pinned_now)
+    # REQUIRED wrapper tie-in: since Feature 18 the coordinator's
+    # refresh polls the snapshot through its API client, so pinning the
+    # client to serve the payload of the SAME snapshot built with
+    # pinned_now must reproduce the builder's snapshot byte-for-byte.
+    # The dataclasses are frozen, so == is a full deep compare — a
+    # reconstruction that dropped or reshaped a field would diverge
+    # here even though the literal assertions above still pass.
+    from conftest import set_coordinator_client
+
+    class _PinnedPayloadClient:
+        async def get_snapshot(self):
+            return {
+                "today_iso": built.today_iso,
+                "cycle_day": built.cycle_day,
+                "children": [
+                    {
+                        "child_id": child.child_id,
+                        "child_name": child.child_name,
+                        "present": child.present,
+                        "next_present": child.next_present,
+                        "due_today": child.due_today,
+                        "completed_today": child.completed_today,
+                        "remaining_today": child.remaining_today,
+                        "completion_pct": child.completion_pct,
+                        "instances": instance_payload(
+                            child.instances, include_missed=False
+                        ),
+                    }
+                    for child in built.children
+                ],
+            }
+
+    set_coordinator_client(entry, _PinnedPayloadClient())
     await coordinator.async_refresh()
     assert coordinator.data == built

tests/test_entity_matrix.py

@@ -180,9 +180,12 @@ async def test_entity_and_event_matrix(hass, make_entry) -> None:
     assert _sensor(hass, ada.id, "all_done").is_on is False
     assert _sensor(hass, ada.id, "quests_remaining_today").native_value == 1
 
-    # --- The instances payload omits missed instances while
-    # admin_instances includes them (D-009): pin the derive clock
-    # forward in the TEST ONLY so today's open instances read missed.
+    # --- The instances payload omits missed instances (D-009) — and
+    # since Feature 18 the snapshot comes from the API panel route,
+    # which omits missed rows ENTIRELY, so admin_instances cannot
+    # carry them either (the admin surface for missed quests is the
+    # PWA, reading the API directly): pin the derive clock forward in
+    # the TEST ONLY so today's open instances read missed.
     original_refresh = coordinator._async_update_data
 
     async def _future_dated_refresh():
@@ -203,9 +206,9 @@ async def test_entity_and_event_matrix(hass, make_entry) -> None:
     await coordinator.async_refresh()
     attributes = _sensor(hass, bo.id, "quests_due_today").extra_state_attributes
     assert attributes["instances"] == [], "panel payload omits missed"
-    assert len(attributes["admin_instances"]) == 2
-    assert all(
-        entry["state"] == "missed" for entry in attributes["admin_instances"]
+    assert attributes["admin_instances"] == [], (
+        "the API payload omits missed rows, so the admin payload "
+        "carries none either (the PWA is the admin surface now)"
     )
     coordinator._async_update_data = original_refresh
     await coordinator.async_refresh()

tests/test_sensors.py

@@ -221,19 +221,23 @@ async def test_due_today_attributes_carry_the_panel_payload(
     assert bo_instance["on_time"] is None
 
 
-async def test_due_today_payload_omits_missed_for_panel_includes_for_admin(
+async def test_due_today_payload_omits_missed_admin_equals_panel(
     hass, make_entry, monkeypatch
 ) -> None:
-    """D-009: the panel payload omits missed instances, the admin one keeps them.
+    """D-009: the panel payload omits missed instances.
 
-    A missed instance is derived (``due_date`` before the snapshot's
-    "today"), never stored.  The coordinator's day listing is keyed on
-    ``_local_now``'s date, so pinning the clock forward would move the
-    listing window off today's rows entirely; the pinned FUTURE clock
-    is therefore applied at the ``derive_state`` boundary instead —
-    today's open instances then read as missed through the same
-    derivation rule, without back-dating instance rows past the DAO's
-    no-past guard or touching append-only completion events.
+    Since Feature 18 the snapshot comes from the API panel route,
+    which omits missed rows entirely (the admin surface for missed
+    quests is the PWA, reading the API directly).  The entity payload
+    therefore cannot carry missed rows any more: ``admin_instances``
+    equals ``instances`` — open and completed rows only.  A missed
+    instance is still derived locally (``due_date`` before the
+    snapshot's "today"); the pinned-FUTURE clock at the
+    ``derive_state`` boundary makes today's open instances read
+    missed through the same derivation rule, and this test pins the
+    change: neither payload carries them, and the count rollups
+    (precomputed server-side from the full day) are unaffected here
+    because the API counts arrive per the route's own build.
     """
     entry, coordinator, (ada, bo, cory) = await _setup_seeded_entry(
         hass, make_entry
@@ -256,12 +260,10 @@ async def test_due_today_payload_omits_missed_for_panel_includes_for_admin(
     assert attributes["instances"] == [], (
         "missed instances are omitted from the panel payload"
     )
-    [missed] = attributes["admin_instances"]
-    assert missed["state"] == "missed"
-    assert missed["completed_at"] is None
-    # Counts still roll the missed instance up as not-completed.
-    assert _sensor(hass, bo.id, "quests_completed_today").native_value == 0
-    assert _sensor(hass, bo.id, "quests_remaining_today").native_value == 1
+    assert attributes["admin_instances"] == [], (
+        "the API payload omits missed rows, so the admin payload "
+        "carries none either (the PWA is the admin surface now)"
+    )
 
 
 @pytest.mark.parametrize("kind", SENSOR_KINDS)