refactor: Replace tokio::spawn with AsyncHandler::spawn for better task management

- Replace direct tokio::spawn calls with AsyncHandler::spawn across multiple modules
- Improves task lifecycle management and error handling consistency
- Affected files:
  - src-tauri/src/cmd/network.rs
  - src-tauri/src/core/core.rs
  - src-tauri/src/core/event_driven_proxy.rs
  - src-tauri/src/enhance/tun.rs
  - src-tauri/src/ipc/logs.rs
  - src-tauri/src/ipc/memory.rs
  - src-tauri/src/ipc/monitor.rs
  - src-tauri/src/ipc/traffic.rs
  - src-tauri/src/utils/network.rs
  - src-tauri/src/utils/resolve.rs

This change provides better control over async task spawning and helps prevent
potential issues with unmanaged background tasks.

src-tauri/src/cmd/network.rs

@@ -1,5 +1,6 @@
 use super::CmdResult;
 use crate::core::{async_proxy_query::AsyncProxyQuery, EventDrivenProxyManager};
+use crate::process::AsyncHandler;
 use crate::wrap_err;
 use network_interface::NetworkInterface;
 use serde_yaml::Mapping;
@@ -32,7 +33,7 @@ pub async fn get_auto_proxy() -> CmdResult<Mapping> {
 
     let current = proxy_manager.get_auto_proxy_cached();
     // 异步请求更新，立即返回缓存数据
-    tokio::spawn(async move {
+    AsyncHandler::spawn(move || async move {
         let _ = proxy_manager.get_auto_proxy_async().await;
     });