Fix missing temperature level on Tuya Heater (qn) devices (#58643)

homeassistant/components/tuya/const.py

@@ -210,6 +210,7 @@ class DPCode(str, Enum):
     LED_TYPE_1 = "led_type_1"
     LED_TYPE_2 = "led_type_2"
     LED_TYPE_3 = "led_type_3"
+    LEVEL = "level"
     LIGHT = "light"  # Light
     LIGHT_MODE = "light_mode"
     LOCK = "lock"  # Lock / Child lock

homeassistant/components/tuya/select.py

@@ -75,6 +75,15 @@ SELECTS: dict[str, tuple[SelectEntityDescription, ...]] = {
             entity_category=ENTITY_CATEGORY_CONFIG,
         ),
     ),
+    # Heater
+    # https://developer.tuya.com/en/docs/iot/categoryqn?id=Kaiuz18kih0sm
+    "qn": (
+        SelectEntityDescription(
+            key=DPCode.LEVEL,
+            name="Temperature Level",
+            icon="mdi:thermometer-lines",
+        ),
+    ),
     # Siren Alarm
     # https://developer.tuya.com/en/docs/iot/categorysgbj?id=Kaiuz37tlpbnu
     "sgbj": (