Validate battery percentage range on manual edit; clamp HA values to 0-100

tests/test_ha_integration.py

@@ -213,6 +213,31 @@ def test_poll_updates_batteries_in_subcomponents(ha_app, ha_client_f):
     s.close()
 
 
+def test_poll_clamps_out_of_range_percentage(ha_app, ha_client_f):
+    """HA sensors occasionally report out-of-range values; the poller clamps to 0-100."""
+    ha_client_f.post("/device/add", data={"name": "Dev E", "battery_slots": "1", "battery_size": "AA"})
+    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
+    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
+    ha_client_f.post("/device/1/edit", data={
+        "name": "Dev E", "battery_slots": "1", "battery_size": "AA", "ha_entity_id": "sensor.dev_e"
+    })
+
+    from ha_client import HomeAssistantClient
+    from ha_poller import HaPoller
+    from models import Battery
+
+    mock_ha = MagicMock(spec=HomeAssistantClient)
+    mock_ha.enabled = True
+    mock_ha.get_state.return_value = 150
+
+    Session = _make_session_factory(ha_app)
+    HaPoller(mock_ha, Session, interval=300)._poll_once()
+
+    s = Session()
+    assert s.get(Battery, 1).battery_percentage == 100
+    s.close()
+
+
 def test_poll_skips_uninstalled_batteries(ha_app, ha_client_f):
     """Batteries that are available (not installed) are not updated by the poller."""
     ha_client_f.post("/device/add", data={"name": "Dev B", "battery_slots": "1", "battery_size": "AA"})