Fix home-assistant/core#103618 (#84)

* Fix home-assistant/core#103618

Use `deviceSettings.desired.temperature_normal`, since the Mill API has a
delay when updating `lastMetrics` after a change is requested.

Signed-off-by: Pip Oomen <pepijn@redpill-linpro.com>

* pylint: wrap long lines

---------

Signed-off-by: Pip Oomen <pepijn@redpill-linpro.com>

mill/__init__.py

@@ -507,11 +507,16 @@ def __post_init__(self) -> None:
         """Post init."""
         if self.data:
             last_metrics = self.data.get("lastMetrics", {})
+            device_settings_desired = self.data.get("deviceSettings", {}).get(
+                "desired", {}
+            )
             if last_metrics is not None:
                 self.current_temp = last_metrics.get("temperatureAmbient")
                 self.is_heating = last_metrics.get("heaterFlag", 0) > 0
                 self.power_status = last_metrics.get("powerStatus", 0) > 0
-                self.set_temp = last_metrics.get("temperature")
+                self.set_temp = device_settings_desired.get(
+                    "temperature_normal", last_metrics.get("temperature")
+                )
                 self.open_window = WINDOW_STATES.get(
                     last_metrics.get("openWindowsStatus")
                 )