diff --git a/client/assets/tray_icon.png b/client/assets/tray_icon.png
new file mode 100644
index 0000000..2019a15
Binary files /dev/null and b/client/assets/tray_icon.png differ
diff --git a/client/lib/main.dart b/client/lib/main.dart
index 1b41297..4ced3fa 100644
--- a/client/lib/main.dart
+++ b/client/lib/main.dart
@@ -8,11 +8,19 @@ import 'services/token_store.dart';
 import 'shell/home_shell.dart';
 import 'state/app_providers.dart';
 import 'state/auth_provider.dart';
+import 'system_tray.dart';
 import 'widgets/auth_screen.dart';
 import 'widgets/onboarding_screen.dart';
 import 'widgets/pangolin_logo.dart';
 
-void main() => runApp(const ProviderScope(child: PangolinApp()));
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  // 桌面端:常驻系统托盘,关闭窗口隐藏到托盘而非退出。
+  if (isDesktop) {
+    await TrayService.instance.init();
+  }
+  runApp(const ProviderScope(child: PangolinApp()));
+}
 
 class PangolinApp extends ConsumerWidget {
   const PangolinApp({super.key});
diff --git a/client/lib/system_tray.dart b/client/lib/system_tray.dart
new file mode 100644
index 0000000..478f2cb
--- /dev/null
+++ b/client/lib/system_tray.dart
@@ -0,0 +1,66 @@
+// system_tray.dart — 桌面端系统托盘 + 关闭即最小化到托盘。
+//
+// macOS/Windows/Linux:关闭主窗口不退出,而是隐藏到托盘;托盘图标点击/菜单
+// 可重新显示或真正退出。移动端/web 不涉及。
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+import 'package:tray_manager/tray_manager.dart';
+import 'package:window_manager/window_manager.dart';
+
+bool get isDesktop =>
+    !kIsWeb && (Platform.isMacOS || Platform.isWindows || Platform.isLinux);
+
+class TrayService with TrayListener, WindowListener {
+  TrayService._();
+  static final TrayService instance = TrayService._();
+
+  /// 在 runApp 前调用(仅桌面端)。设置窗口拦截关闭 + 托盘图标与菜单。
+  Future<void> init() async {
+    await windowManager.ensureInitialized();
+    // 关闭窗口转为隐藏到托盘(见 onWindowClose)。
+    await windowManager.setPreventClose(true);
+    windowManager.addListener(this);
+
+    trayManager.addListener(this);
+    await trayManager.setIcon('assets/tray_icon.png');
+    await trayManager.setToolTip('穿山甲 Pangolin');
+    await trayManager.setContextMenu(Menu(items: [
+      MenuItem(key: 'show', label: '显示主界面'),
+      MenuItem.separator(),
+      MenuItem(key: 'quit', label: '退出'),
+    ]));
+  }
+
+  Future<void> _show() async {
+    await windowManager.show();
+    await windowManager.focus();
+  }
+
+  // ── 托盘事件 ──────────────────────────────────────────────────
+  @override
+  void onTrayIconMouseDown() => _show();
+
+  @override
+  void onTrayIconRightMouseDown() => trayManager.popUpContextMenu();
+
+  @override
+  void onTrayMenuItemClick(MenuItem menuItem) {
+    switch (menuItem.key) {
+      case 'show':
+        _show();
+      case 'quit':
+        windowManager.setPreventClose(false);
+        windowManager.destroy();
+    }
+  }
+
+  // ── 窗口事件 ──────────────────────────────────────────────────
+  @override
+  void onWindowClose() async {
+    // 点关闭 → 隐藏到托盘而非退出(常驻保持隧道)。
+    if (await windowManager.isPreventClose()) {
+      await windowManager.hide();
+    }
+  }
+}
diff --git a/client/pubspec.yaml b/client/pubspec.yaml
index bf68abb..76d8c34 100644
--- a/client/pubspec.yaml
+++ b/client/pubspec.yaml
@@ -20,6 +20,8 @@ dependencies:
   shared_preferences: ^2.5.5
   package_info_plus: ^9.0.1
   launch_at_startup: ^0.5.1
+  tray_manager: ^0.5.3
+  window_manager: ^0.5.1
 
 dev_dependencies:
   flutter_test:
@@ -42,6 +44,7 @@ flutter:
     - assets/logo-mark-white.svg
     - assets/logo-wordmark.svg
     - assets/app-icon.svg
+    - assets/tray_icon.png
 
   # ── 字体(由 google_fonts 运行时加载,无需本地 ttf)──
   # 若需离线/打包字体,下载 ttf 放 fonts/,并按 pubspec 模板恢复 fonts: 段。