Fix HOMECARE_WIZARD_V2 false-positive warning and None entity_id log (#235)

HOMECARE_WIZARD_V2 appears in /mode/vs/0's supportedModes on TP2X_RAC_20K
units but is a capability/option flag echoed from
/configuration/vs/0's airconOptionList, not a selectable HVAC mode -- the
unit's current mode never reports it. Added to a new
_NON_HVAC_OPTION_CODES set that's dropped silently, so hvac_mode/hvac_modes
stop tripping the issue #93 unmapped-mode warning for it on every start.

Also fixes _warn_unmapped logging "None: device mode ..." during setup's
first discovery pass, before the entity is added to hass and entity_id is
assigned -- falls back to unique_id (set eagerly in __init__), so multiple
same-type devices are distinguishable in the log.

tests/test_climate_homecare_wizard.py

@@ -0,0 +1,80 @@
+"""Tests for issue #235: HOMECARE_WIZARD_V2 false-positive unmapped-mode
+warning, and the entity_id-is-None logging gap it surfaced.
+
+Uses the pre-existing airconditioner_tp2x_rac_20k fixture (issue #37) --
+its /mode/vs/0 already carries the exact reporter-confirmed shape:
+supportedModes includes 'HOMECARE_WIZARD_V2' alongside the real modes, the
+current mode ('Cool') never is it, and /configuration/vs/0's
+airconOptionList lists it alongside other plain capability flags.
+"""
+
+from __future__ import annotations
+
+import logging
+
+import pytest
+from homeassistant.components.climate import HVACMode
+from homeassistant.core import HomeAssistant
+
+from custom_components.localthings.climate import _NON_HVAC_OPTION_CODES, LocalThingsClimate
+from custom_components.localthings.registry.entities import ClimateDesc
+from tests.test_subdevice_discovery import _coordinator, _discover
+
+
+@pytest.fixture
+async def climate(hass: HomeAssistant):
+    coordinator = _coordinator(hass)
+    await _discover(coordinator, "airconditioner_tp2x_rac_20k")
+    bound = next(b for b in coordinator.bound if isinstance(b.desc, ClimateDesc))
+    return LocalThingsClimate(coordinator, bound)
+
+
+def test_homecare_wizard_v2_excluded_from_hvac_modes(climate):
+    """supportedModes is ['Auto', 'Cool', 'Dry', 'Wind', 'Heat',
+    'HOMECARE_WIZARD_V2'] -- five real modes plus the option flag. Every
+    real mode maps through; the flag contributes no extra (or bogus)
+    HVACMode entry."""
+    modes = climate.hvac_modes
+    assert set(modes) == {
+        HVACMode.OFF,
+        HVACMode.AUTO,
+        HVACMode.COOL,
+        HVACMode.DRY,
+        HVACMode.HEAT,
+        HVACMode.FAN_ONLY,
+    }
+
+
+def test_homecare_wizard_v2_reports_no_warning(climate, caplog):
+    """Reading hvac_modes must not emit the issue #93 unmapped-mode warning
+    for HOMECARE_WIZARD_V2 -- that's the actual bug report: every owner of
+    an affected unit saw this fire on every start."""
+    with caplog.at_level(logging.WARNING):
+        _ = climate.hvac_modes
+    assert "HOMECARE_WIZARD_V2" not in caplog.text
+
+
+def test_hvac_mode_is_off_when_powered_off(climate):
+    """The fixture's power is off -- hvac_mode short-circuits to OFF before
+    ever reading /mode/vs/0's 'Cool', matching real behavior (mode is only
+    meaningful while the unit is on)."""
+    assert climate.hvac_mode == HVACMode.OFF
+
+
+def test_homecare_wizard_v2_is_the_known_non_hvac_set():
+    assert "HOMECARE_WIZARD_V2" in _NON_HVAC_OPTION_CODES
+
+
+def test_warn_unmapped_falls_back_to_unique_id_when_entity_id_unset(climate, caplog):
+    """Issue #235's secondary bug: _warn_unmapped logged 'None: device mode
+    ...' because entity_id is unset until the entity is added to hass --
+    exactly the state a fixture-backed entity is in here, without ever
+    calling async_add_entities. unique_id is set eagerly in __init__
+    (entity.py), so it must appear in the log line instead of a bare
+    'None'."""
+    assert climate.entity_id is None
+    assert climate.unique_id is not None
+    with caplog.at_level(logging.WARNING):
+        climate._warn_unmapped("/mode/vs/0", "TotallyUnknownCode")
+    assert "None:" not in caplog.text
+    assert climate.unique_id in caplog.text