fix: improve reservation cleanup and share popup handling

frontend/app.js

@@ -3181,11 +3181,25 @@ handleDragLeave(e) {
 
     openShare(url) {
       if (!url) return;
-      const newWindow = window.open(url, '_blank', 'noopener');
-      if (!newWindow || newWindow.closed || typeof newWindow.closed === 'undefined') {
-        // 弹窗被拦截时提示用户手动打开，避免当前页跳转
-        this.showToast('info', '提示', '浏览器阻止了新标签页，请允许弹窗或手动打开链接');
+      // 仅在真正被拦截（返回 null/undefined）时提示，避免已打开仍误报
+      let newWindow = null;
+      try {
+        newWindow = window.open(url, '_blank');
+      } catch (error) {
+        newWindow = null;
       }
+
+      if (newWindow) {
+        try {
+          // 防止新窗口通过 opener 反向控制当前页面
+          newWindow.opener = null;
+        } catch (e) {
+          // 忽略跨域写 opener 失败
+        }
+        return;
+      }
+
+      this.showToast('info', '提示', '浏览器阻止了新标签页，请允许弹窗或手动打开链接');
     },
 
     copyTextToClipboard(text, successMessage = '已复制到剪贴板') {
@@ -4559,15 +4573,17 @@ handleDragLeave(e) {
 
     async cleanupReservations() {
       if (this.reservationMonitor.cleaning) return;
-      if (!confirm('确认清理过期/历史预扣记录吗？')) return;
+      if (!confirm('确认清理预扣历史吗？将立即删除已完成/已过期/已取消记录。')) return;
 
       this.reservationMonitor.cleaning = true;
       try {
         const response = await axios.post(`${this.apiBase}/api/admin/download-reservations/cleanup`, {
-          keep_days: 7
+          keep_days: 0
         });
         if (response.data?.success) {
-          this.showToast('success', '成功', response.data.message || '预扣清理完成');
+          const result = response.data?.result || {};
+          const msg = `已清理历史 ${Number(result.deleted_finalized || 0)} 条，过期待确认 ${Number(result.expired_pending || 0)} 条`;
+          this.showToast('success', '成功', msg);
           await this.loadDownloadReservationMonitor(1);
         }
       } catch (error) {