Move DEFAULT_RADIUS to const.py to drop zone inline imports in core_config (#175896)

Co-authored-by: Claude <noreply@anthropic.com>

homeassistant/components/zone/__init__.py

@@ -20,6 +20,7 @@ from homeassistant.const import (
     CONF_LONGITUDE,
     CONF_NAME,
     CONF_RADIUS,
+    DEFAULT_RADIUS,
     EVENT_CORE_CONFIG_UPDATE,
     SERVICE_RELOAD,
     STATE_UNAVAILABLE,
@@ -49,7 +50,6 @@ from .const import ATTR_PASSIVE, ATTR_RADIUS, CONF_PASSIVE, DOMAIN, HOME_ZONE
 _LOGGER = logging.getLogger(__name__)
 
 DEFAULT_PASSIVE = False
-DEFAULT_RADIUS = 100
 
 ENTITY_ID_FORMAT = "zone.{}"
 ENTITY_ID_HOME = ENTITY_ID_FORMAT.format(HOME_ZONE)

homeassistant/const.py

@@ -48,6 +48,9 @@ ENTITY_MATCH_ANY: Final = "any"
 # If no name is specified
 DEVICE_DEFAULT_NAME: Final = "Unnamed Device"
 
+# Default radius of the Home Zone (in meters)
+DEFAULT_RADIUS: Final = 100
+
 # Max characters for data stored in the recorder (changes to these limits would require
 # a database migration)
 MAX_LENGTH_EVENT_EVENT_TYPE: Final = 64

homeassistant/core_config.py

@@ -49,6 +49,7 @@ from .const import (
     CONF_UNIT_SYSTEM,
     CONF_URL,
     CONF_USERNAME,
+    DEFAULT_RADIUS,
     EVENT_CORE_CONFIG_UPDATE,
     KEY_DATA_LOGGING_DISABLED_REASON,
     LEGACY_CONF_WHITELIST_EXTERNAL_DIRS,
@@ -538,8 +539,6 @@ class Config:
 
     def __init__(self, hass: HomeAssistant, config_dir: str) -> None:
         """Initialize a new config object."""
-        from .components.zone import DEFAULT_RADIUS  # noqa: PLC0415
-
         self.hass = hass
 
         self.latitude: float = 0
@@ -858,9 +857,6 @@ class Config:
             old_data: dict[str, Any],
         ) -> dict[str, Any]:
             """Migrate to the new version."""
-
-            from .components.zone import DEFAULT_RADIUS  # noqa: PLC0415
-
             data = old_data
             if old_major_version == 1 and old_minor_version < 2:
                 # In 1.2, we remove support for "imperial", replaced by "us_customary"