Fjaraskupan stop on 0 percentage (#79367)

* Make sure fan turns off on 0 percentage

* Remember old percentage

homeassistant/components/fjaraskupan/fan.py

@@ -82,10 +82,17 @@ class Fan(CoordinatorEntity[Coordinator], FanEntity):
 
     async def async_set_percentage(self, percentage: int) -> None:
         """Set speed."""
+
+        # Proactively update percentage to mange successive increases
+        self._percentage = percentage
+
+        async with self.coordinator.async_connect_and_update() as device:
+            if percentage == 0:
+                await device.send_command(COMMAND_STOP_FAN)
+            else:
                 new_speed = percentage_to_ordered_list_item(
                     ORDERED_NAMED_FAN_SPEEDS, percentage
                 )
-        async with self.coordinator.async_connect_and_update() as device:
                 await device.send_fan_speed(int(new_speed))
 
     async def async_turn_on(