Add discrete freezer setpoint support for TP1X_REF_21K (issue #229)

The reporter's fridge/freezer combo reports the issue #186 discrete
definite-setpoint pattern on both compartments, but only the cooler half
was modeled -- /temperature/definite/freezer/vs/0 was unbound. Adds
DEFINITE_TEMPERATURE_FREEZER, identical shape to the existing cooler
capability (same fields, just negative supportedList values).

custom_components/localthings/registry/by_type/refrigerator.py

@@ -28,6 +28,7 @@ REGISTRY = DeviceRegistry(
             fridge.DEFROST_DELAY_NATIVE_DUPLICATE,
             fridge.DEFROST_BLOCK_STATUS,
             fridge.DEFINITE_TEMPERATURE_COOLER,
+            fridge.DEFINITE_TEMPERATURE_FREEZER,
             fridge.DOORS_FALLBACK,
             fridge.TEMPERATURES_FALLBACK,
             fridge.ICEMAKER_STATUS_FALLBACK,

custom_components/localthings/registry/capabilities/fridge.py

@@ -163,6 +163,34 @@ DEFINITE_TEMPERATURE_COOLER = Capability(
     ),
 )
 
+
+def _definite_freezer_write(p, rep, href=None):
+    return (
+        ["temperature", "definite", "freezer", "vs", "0"],
+        {"x.com.samsung.da.definite.desired": p},
+    )
+
+
+# Freezer half of the same discrete-setpoint pattern (issue #229): a
+# fridge/freezer combo reporting no /temperature/current|desired/freezer
+# pair, only this bundled vendor resource -- identical shape to
+# DEFINITE_TEMPERATURE_COOLER above (down to the field names), just negative
+# supportedList values (e.g. ['-23','-21','-19','-17','-15']).
+DEFINITE_TEMPERATURE_FREEZER = Capability(
+    href="/temperature/definite/freezer/vs/0",
+    poll_tier="warm",
+    entities=(
+        SelectDesc(
+            key="freezer_temperature_setpoint",
+            field="x.com.samsung.da.definite.desired",
+            icon="mdi:thermometer",
+            entity_category="config",
+            options_field="x.com.samsung.da.definite.supportedList",
+            write_fn=_definite_freezer_write,
+        ),
+    ),
+)
+
 # ---------------------------------------------------------------------------
 # Icemaker nighttime quiet mode
 # ---------------------------------------------------------------------------

custom_components/localthings/translations/cs.json

@@ -643,6 +643,9 @@
       },
       "air_filter_pm1_threshold": {
         "name": "Práh alarmu PM1 filtru"
+      },
+      "freezer_temperature_setpoint": {
+        "name": "Teplota mrazicí zóny"
       }
     },
     "sensor": {

custom_components/localthings/translations/en.json

@@ -643,6 +643,9 @@
       },
       "air_filter_pm1_threshold": {
         "name": "PM1 filter alarm threshold"
+      },
+      "freezer_temperature_setpoint": {
+        "name": "Freezer temperature"
       }
     },
     "sensor": {

custom_components/localthings/translations/es.json

@@ -757,6 +757,9 @@
       },
       "air_filter_pm1_threshold": {
         "name": "Umbral de alarma del filtro PM1"
+      },
+      "freezer_temperature_setpoint": {
+        "name": "Temperatura del congelador"
       }
     },
     "sensor": {

custom_components/localthings/translations/it.json

@@ -643,6 +643,9 @@
       },
       "air_filter_pm1_threshold": {
         "name": "Soglia di allarme del filtro PM1"
+      },
+      "freezer_temperature_setpoint": {
+        "name": "Temperatura freezer"
       }
     },
     "sensor": {

custom_components/localthings/translations/nl.json

@@ -643,6 +643,9 @@
       },
       "air_filter_pm1_threshold": {
         "name": "PM1-filteralarmdrempel"
+      },
+      "freezer_temperature_setpoint": {
+        "name": "Temperatuur vriesgedeelte"
       }
     },
     "sensor": {