Fix errors in HitachiDHW in Overkiz (#133765)

* Small changes to fix errors in DHW

* Update

* Bugfix in float/int mistake

* Fix typing

* Fix code style

* Fix mypy

homeassistant/components/overkiz/water_heater/hitachi_dhw.py

@@ -48,8 +48,10 @@ class HitachiDHW(OverkizEntity, WaterHeaterEntity):
     def current_temperature(self) -> float | None:
         """Return the current temperature."""
         current_temperature = self.device.states[OverkizState.CORE_DHW_TEMPERATURE]
-        if current_temperature:
-            return current_temperature.value_as_float
+
+        if current_temperature and current_temperature.value_as_int:
+            return float(current_temperature.value_as_int)
+
         return None
 
     @property
@@ -58,13 +60,14 @@ def target_temperature(self) -> float | None:
         target_temperature = self.device.states[
             OverkizState.MODBUS_CONTROL_DHW_SETTING_TEMPERATURE
         ]
-        if target_temperature:
-            return target_temperature.value_as_float
+
+        if target_temperature and target_temperature.value_as_int:
+            return float(target_temperature.value_as_int)
+
         return None
 
     async def async_set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
-
         await self.executor.async_execute_command(
             OverkizCommand.SET_CONTROL_DHW_SETTING_TEMPERATURE,
             int(kwargs[ATTR_TEMPERATURE]),