feat: add translations and improve config flow UX

- translations/en.json: runtime translation file HA loads (strings.json
  is tooling-only); includes data_description hints for host, cert, key

- config_flow.py: cert_pem and key_pem rendered as multiline text areas
  via TextSelector so users can paste full PEM blocks; host stays single-line

- strings.json: expanded error messages and data_description to match

- entity.py: entities with name=None (pattern-cap doors, temps, icemmakers)
  now derive a human-readable title from their state key instead of
  displaying blank ("door_cooler_open1" → "Door Cooler Open 1")

custom_components/localthings/config_flow.py

@@ -9,9 +9,17 @@ from typing import Any
 import voluptuous as vol
 from homeassistant import config_entries
 from homeassistant.data_entry_flow import FlowResult
+from homeassistant.helpers.selector import (
+    TextSelector,
+    TextSelectorConfig,
+    TextSelectorType,
+)
 
 from .const import DOMAIN, CONF_HOST, CONF_PORT, CONF_CERT_PEM, CONF_KEY_PEM, PROBE_PORTS
 
+_TEXT = TextSelector(TextSelectorConfig(type=TextSelectorType.TEXT))
+_MULTILINE = TextSelector(TextSelectorConfig(type=TextSelectorType.TEXT, multiline=True))
+
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -151,13 +159,13 @@ class LocalThingsConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 )
 
         if has_creds:
-            schema = vol.Schema({vol.Required(CONF_HOST): str})
+            schema = vol.Schema({vol.Required(CONF_HOST): _TEXT})
             reuse_note = "Certificate and key will be reused from the existing device."
         else:
             schema = vol.Schema({
-                vol.Required(CONF_HOST): str,
-                vol.Required(CONF_CERT_PEM): str,
-                vol.Required(CONF_KEY_PEM): str,
+                vol.Required(CONF_HOST): _TEXT,
+                vol.Required(CONF_CERT_PEM): _MULTILINE,
+                vol.Required(CONF_KEY_PEM): _MULTILINE,
             })
             reuse_note = ""
 

custom_components/localthings/entity.py

@@ -1,6 +1,8 @@
 """Base entity for Local Things."""
 from __future__ import annotations
 
+import re
+
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 from homeassistant.helpers.device_registry import DeviceInfo
 
@@ -11,6 +13,16 @@ from .const import DOMAIN
 from .coordinator import LocalThingsCoordinator
 
 
+def _derive_name(state_key: str) -> str:
+    """Turn a snake_case state key into a title-cased display name.
+
+    Strips a trailing instance number of 0 (singleton), promotes any other
+    instance number with a space: "door_cooler_open1" → "Door Cooler Open 1".
+    """
+    name = re.sub(r'(\d+)$', lambda m: f' {m.group()}' if int(m.group()) > 0 else '', state_key)
+    return name.replace('_', ' ').title().strip()
+
+
 class LocalThingsEntity(CoordinatorEntity[LocalThingsCoordinator]):
     """Base class for all Local Things entities."""
 
@@ -21,7 +33,7 @@ class LocalThingsEntity(CoordinatorEntity[LocalThingsCoordinator]):
         self._bound = bound
         self._state_key = _key(bound)
         self._attr_unique_id = f"{DOMAIN}_{coordinator.device_serial}_{self._state_key}"
-        self._attr_name = bound.desc.name
+        self._attr_name = bound.desc.name if bound.desc.name is not None else _derive_name(self._state_key)
         self._attr_icon = bound.desc.icon
         self._attr_entity_category = bound.desc.entity_category
         self._attr_entity_registry_enabled_default = bound.desc.enabled_default

custom_components/localthings/strings.json

@@ -3,17 +3,22 @@
     "step": {
       "user": {
         "title": "Add Samsung Appliance",
-        "description": "Enter the IP address of your Samsung appliance. {reuse_note}",
+        "description": "Enter the IP address of your Samsung appliance on the local network. {reuse_note}",
         "data": {
           "host": "IP Address",
           "cert_pem": "Certificate (PEM)",
           "key_pem": "Private Key (PEM)"
+        },
+        "data_description": {
+          "host": "Local IP address of your Samsung appliance (e.g. 192.168.1.50).",
+          "cert_pem": "The PEM-encoded client certificate used to authenticate with the appliance. Paste the full contents including the BEGIN/END CERTIFICATE header and footer.",
+          "key_pem": "The PEM-encoded private key matching the certificate above. Paste the full contents including the BEGIN/END PRIVATE KEY header and footer."
         }
       }
     },
     "error": {
-      "cannot_connect": "Cannot connect to the device. Check the IP address and credentials.",
-      "unknown": "Unexpected error."
+      "cannot_connect": "Cannot connect to the device. Verify the IP address is reachable and the certificate and key are correct.",
+      "unknown": "Unexpected error. Check the Home Assistant logs for details."
     },
     "abort": {
       "already_configured": "This device is already configured."

custom_components/localthings/translations/en.json

@@ -0,0 +1,27 @@
+{
+  "config": {
+    "step": {
+      "user": {
+        "title": "Add Samsung Appliance",
+        "description": "Enter the IP address of your Samsung appliance on the local network. {reuse_note}",
+        "data": {
+          "host": "IP Address",
+          "cert_pem": "Certificate (PEM)",
+          "key_pem": "Private Key (PEM)"
+        },
+        "data_description": {
+          "host": "Local IP address of your Samsung appliance (e.g. 192.168.1.50).",
+          "cert_pem": "The PEM-encoded client certificate used to authenticate with the appliance. Paste the full contents including the BEGIN/END CERTIFICATE header and footer.",
+          "key_pem": "The PEM-encoded private key matching the certificate above. Paste the full contents including the BEGIN/END PRIVATE KEY header and footer."
+        }
+      }
+    },
+    "error": {
+      "cannot_connect": "Cannot connect to the device. Verify the IP address is reachable and the certificate and key are correct.",
+      "unknown": "Unexpected error. Check the Home Assistant logs for details."
+    },
+    "abort": {
+      "already_configured": "This device is already configured."
+    }
+  }
+}