ha(H3): превью шаблона с конверсиями; climate и сущности

- config flow: шаг preview (шаблон A/B/F, диапазон/шаг уставки, линейные
  коэффициенты num/den/offset, текст-превью по данным trial: hvac/fan/
  swing/capabilities/текущая температура)
- coordinator: push-driven DataUpdateCoordinator (снимок кэша, доступность
  online/recovering, первичный GET-батч, один batch_commit на действие)
- overrides.py: ConversionSet (ручные линейные конверсии и диапазон поверх
  таблиц ядра, применяются в HA)
- entity.py: DeviceInfo/unique_id/доступность, capabilities-фильтры
- climate: hvac/fan/swing/vertical+horizontal swing/preset ECO-BOOST,
  уставка 16-30 °C (шаг по шаблону), current_temperature
- sensor: room_temperature, error_code, connection_state (диагностика)
- binary_sensor: connectivity + флаги op_status (PROTOCOL §8.4)
- switch: 8 флагов-свойств; select: положения заслонок 0..N-1
- тесты: превью/конверсии/ошибки диапазона, сущности против mock_ac
  (снимок, команды, capabilities-фильтр, ручная конверсия), ConversionSet
- mock_ac: --set NAME=VALUE (0b/0x) для сценариев
- план: demand_control отложен (семантика не зафиксирована)

custom_components/fglair/translations/en.json

@@ -51,6 +51,24 @@
         "data_description": {
           "config_json": "Paste a JSON object produced by fglair-discover or fglctl"
         }
+      },
+      "preview": {
+        "title": "Template preview",
+        "description": "Computed mapping (compare with the FGLair app):\n\n{preview}\n\nSetpoint range and conversion can be adjusted below.",
+        "data": {
+          "template": "Template",
+          "temp_min": "Minimum setpoint (°C)",
+          "temp_max": "Maximum setpoint (°C)",
+          "temp_step": "Setpoint step (°C)",
+          "temp_num": "Conversion numerator",
+          "temp_den": "Conversion denominator",
+          "temp_offset": "Conversion offset (0.1 °C)"
+        },
+        "data_description": {
+          "temp_num": "display = raw × num / den + offset (raw in API units, 0.1 °C)",
+          "temp_den": "display = raw × num / den + offset (raw in API units, 0.1 °C)",
+          "temp_offset": "display = raw × num / den + offset (raw in API units, 0.1 °C)"
+        }
       }
     },
     "error": {
@@ -62,7 +80,8 @@
       "invalid_import": "Invalid config JSON",
       "no_devices": "No devices found in the account",
       "unknown": "Unexpected error",
-      "properties_missing": "The device connected but did not report its base properties"
+      "properties_missing": "The device connected but did not report its base properties",
+      "invalid_range": "Minimum must be less than maximum, step must be positive"
     },
     "abort": {
       "already_configured": "This device is already configured",
@@ -73,5 +92,86 @@
       "timeout": "Timed out waiting for the device",
       "properties_missing": "The device connected but did not report its base properties"
     }
+  },
+  "entity": {
+    "climate": {
+      "name": "Air conditioner"
+    },
+    "sensor": {
+      "room_temperature": {
+        "name": "Room temperature"
+      },
+      "error_code": {
+        "name": "Error code"
+      },
+      "connection_state": {
+        "name": "Connection state",
+        "state": {
+          "idle": "Idle",
+          "registering": "Registering",
+          "online": "Online",
+          "recovering": "Recovering",
+          "offline": "Offline",
+          "key_error": "Key error"
+        }
+      }
+    },
+    "binary_sensor": {
+      "connectivity": {
+        "name": "Connectivity"
+      },
+      "defrost": {
+        "name": "Defrost"
+      },
+      "maintenance": {
+        "name": "Maintenance"
+      },
+      "oil_recovery": {
+        "name": "Oil recovery"
+      },
+      "pump_down": {
+        "name": "Pump down"
+      },
+      "check_operation": {
+        "name": "Check operation"
+      },
+      "simultaneous": {
+        "name": "Simultaneous operation"
+      }
+    },
+    "switch": {
+      "economy_mode": {
+        "name": "Economy"
+      },
+      "powerful_mode": {
+        "name": "Powerful"
+      },
+      "coil_dry_mode": {
+        "name": "Coil dry"
+      },
+      "min_heat": {
+        "name": "Minimum heat"
+      },
+      "outdoor_low_noise": {
+        "name": "Outdoor low noise"
+      },
+      "human_det_auto_save": {
+        "name": "Human detection auto save"
+      },
+      "wifi_led_enable": {
+        "name": "Wi-Fi LED"
+      },
+      "indoor_fan_control": {
+        "name": "Indoor fan control"
+      }
+    },
+    "select": {
+      "af_vertical_direction": {
+        "name": "Vertical airflow direction"
+      },
+      "af_horizontal_direction": {
+        "name": "Horizontal airflow direction"
+      }
+    }
   }
 }