[core] Move CONF_ON_STOP to the shared component constants (#20548)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

esphome/components/const/__init__.py

@@ -50,6 +50,7 @@ CONF_ON_PACKET = "on_packet"
 CONF_ON_RECEIVE = "on_receive"
 CONF_ON_SCAN_END = "on_scan_end"
 CONF_ON_STATE_CHANGE = "on_state_change"
+CONF_ON_STOP = "on_stop"
 CONF_PARITY = "parity"
 CONF_RECEIVER_FREQUENCY = "receiver_frequency"
 CONF_RECONNECT_INTERVAL = "reconnect_interval"

esphome/components/improv_ble/__init__.py

@@ -1,6 +1,7 @@
 from esphome import automation
 import esphome.codegen as cg
 from esphome.components import binary_sensor, improv_base, output
+from esphome.components.const import CONF_ON_STOP
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_ON_START, CONF_ON_STATE, PLATFORM_ESP32
 from esphome.core import CORE
@@ -38,7 +39,6 @@ CONF_BLE_SERVER_ID = "ble_server_id"
 CONF_IDENTIFY_DURATION = "identify_duration"
 CONF_ON_PROVISIONED = "on_provisioned"
 CONF_ON_PROVISIONING = "on_provisioning"
-CONF_ON_STOP = "on_stop"
 CONF_STATUS_INDICATOR = "status_indicator"
 CONF_WIFI_TIMEOUT = "wifi_timeout"
 

esphome/components/lvgl/animation.py

@@ -15,11 +15,10 @@ from esphome.const import (
 )
 from esphome.cpp_generator import MockObj, TemplateArguments
 
-from ..const import CONF_LOOP
+from ..const import CONF_LOOP, CONF_ON_STOP
 from .defines import (
     CONF_AUTO_START,
     CONF_LVGL_ID,
-    CONF_ON_STOP,
     CONF_WIDGETS,
     LValidator,
     add_define,

esphome/components/lvgl/defines.py

@@ -788,7 +788,6 @@ CONF_ON_PAUSE = "on_pause"
 CONF_ON_PORTRAIT = "on_portrait"
 CONF_ON_RESUME = "on_resume"
 CONF_ON_SELECT = "on_select"
-CONF_ON_STOP = "on_stop"
 CONF_OPA = "opa"
 CONF_NEXT = "next"
 CONF_PAD_ROW = "pad_row"