Reconstructing Notify module

crates/notify/src/global.rs

@@ -0,0 +1,12 @@
+use crate::NotificationSystem;
+use once_cell::sync::Lazy;
+use std::sync::Arc;
+
+static NOTIFICATION_SYSTEM: Lazy<Arc<NotificationSystem>> =
+    Lazy::new(|| Arc::new(NotificationSystem::new()));
+
+/// Returns the handle to the global NotificationSystem instance.
+/// This function can be called anywhere you need to interact with the notification system。
+pub fn notification_system() -> Arc<NotificationSystem> {
+    NOTIFICATION_SYSTEM.clone()
+}