Refactor V2RayServiceManager to Use Constants for Configuration Values. - Replaced hardcoded string literals for 'uplink' and 'downlink' with constants from AppConfig. - Introduced constants for notification channel ID and name.
Refactor V2RayServiceManager to Use Constants for Configuration Values. - Replaced hardcoded string literals for 'uplink' and 'downlink' with constants from AppConfig. - Introduced constants for notification channel ID and name.