refactor(app): extract common exit cleanup

restart_app and quit duplicate the whole exit preparation: set the
exiting flag, persist configs, run interactive cleanup, and on a failed
core stop clear the flag, restore public DNS under the lifecycle lock
on macOS, and send the stop-failed notice.

Move that flow into run_exit_cleanup_flow next to clean_async, taking
the notice variant as a parameter and returning the CleanupResult so
each caller keeps its own tail: restart aborts before shutdown, quit
always shuts down and exits with the cleanup code.

src-tauri/src/feat/clash.rs

@@ -3,7 +3,7 @@ use crate::core::notify::{Refresh, announce};
 use crate::{
     config::{Config, MixedPort},
     core::{CoreManager, handle, tray},
-    feat::clean_async,
+    feat::run_exit_cleanup_flow,
     process::AsyncHandler,
     utils,
 };
@@ -31,38 +31,9 @@ pub async fn restart_clash_core() {
 
 pub async fn restart_app() {
     logging!(debug, Type::System, "启动重启应用流程");
-    handle::Handle::global().set_is_exiting();
-
-    Config::apply_all_and_save_file().await;
-
-    let cleanup_result = clean_async().await;
-
-    logging!(
-        info,
-        Type::System,
-        "资源清理完成，退出代码: {}",
-        if cleanup_result.all_success { 0 } else { 1 }
-    );
+    let cleanup_result = run_exit_cleanup_flow(NoticeStatus::AppRestartCoreStopFailed).await;
 
     if !cleanup_result.core_stopped {
-        handle::Handle::global().clear_is_exiting();
-        // A failed stop may still have marked the core stopped, and exit cleanup skipped the DNS restore.
-        // A core that kept running keeps its DNS, whatever an unapplied config draft says.
-        #[cfg(target_os = "macos")]
-        {
-            let manager = CoreManager::global();
-            let _lifecycle = manager.lifecycle_lock.lock().await;
-            if matches!(
-                *manager.get_running_mode(),
-                crate::core::manager::RunningMode::NotRunning
-            ) {
-                crate::utils::resolve::dns::sync_public_dns().await;
-            }
-        }
-        handle::Handle::notice(
-            NoticeStatus::AppRestartCoreStopFailed,
-            cleanup_result.stop_error.unwrap_or_default(),
-        );
         return;
     }
 

src-tauri/src/feat/window.rs

@@ -130,9 +130,7 @@ pub async fn open_or_close_dashboard() {
     logging!(info, Type::Window, "Window toggle result: {result:?}");
 }
 
-pub async fn quit() {
-    logging!(debug, Type::System, "启动退出流程");
-    // 设置退出标志
+pub(crate) async fn run_exit_cleanup_flow(stop_failed_notice: NoticeStatus) -> CleanupResult {
     handle::Handle::global().set_is_exiting();
 
     Config::apply_all_and_save_file().await;
@@ -162,11 +160,18 @@ pub async fn quit() {
             }
         }
         handle::Handle::notice(
-            NoticeStatus::AppQuitCoreStopFailed,
-            cleanup_result.stop_error.unwrap_or_default(),
+            stop_failed_notice,
+            cleanup_result.stop_error.clone().unwrap_or_default(),
         );
     }
 
+    cleanup_result
+}
+
+pub async fn quit() {
+    logging!(debug, Type::System, "启动退出流程");
+    let cleanup_result = run_exit_cleanup_flow(NoticeStatus::AppQuitCoreStopFailed).await;
+
     utils::server::shutdown_embedded_server();
     let app_handle = handle::Handle::app_handle();
     app_handle.exit(if cleanup_result.all_success { 0 } else { 1 });