处理身份证读取错误时恢复 UI 状态并添加用户提示

src/pages/U1/u1.tsx

@@ -70,6 +70,14 @@ const U1: React.FC = () => {
     window.electronAPI.onIdCardError((e: any) => {
       console.error("[idcard-error]", e.payload);
       window.electronAPI.log("error", `[idcard-error] ${e.payload}`);
+      // 发生错误时立即恢复 UI 状态
+      if (timerRef.current) {
+        clearTimeout(timerRef.current);
+        timerRef.current = null;
+      }
+      setReading(false);
+      window.electronAPI.stopIdCardListen().catch(() => {});
+      alert(`读取身份证失败: ${e.payload}`);
     });
 
     return () => {