添加应用退出功能，支持通过长按触摸事件触发退出

src/App.tsx

@@ -39,7 +39,8 @@ function App() {
 
   const handleTouchStart = () => {
     restartTimerRef.current = window.setTimeout(() => {
-      window.electronAPI.restartApp();
+      // 长按 5 秒改为关闭应用
+      window.electronAPI.quitApp();
     }, 5000);
   };
 

src/electron.d.ts

@@ -28,6 +28,7 @@ interface ElectronAPI {
   log: (level: string, message: any) => void;
   removeIdCardListeners: () => void;
   restartApp: () => void;
+  quitApp: () => void;
 }
 
 interface Window {