diff --git a/backend/database.js b/backend/database.js
index 2eb78da..29ecdda 100644
--- a/backend/database.js
+++ b/backend/database.js
@@ -2284,8 +2284,12 @@ const DownloadTrafficReservationDB = {
     };
   },
 
-  cleanupFinalizedHistory(keepDays = 7) {
-    const days = Math.min(365, Math.max(1, Math.floor(Number(keepDays) || 7)));
+  cleanupFinalizedHistory(keepDays = 0) {
+    // keepDays=0 表示立即清理全部已完成历史（confirmed/expired/cancelled）
+    const normalized = Number(keepDays);
+    const days = Number.isFinite(normalized)
+      ? Math.min(365, Math.max(0, Math.floor(normalized)))
+      : 0;
     return db.prepare(`
       DELETE FROM user_download_traffic_reservations
       WHERE status IN ('confirmed', 'expired', 'cancelled')
diff --git a/backend/server.js b/backend/server.js
index d13366c..51cb474 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -8843,7 +8843,10 @@ app.post('/api/admin/download-reservations/:id/cancel', authMiddleware, adminMid
 // 下载流量预扣运维面板：批量清理（过期 pending + 历史 finalized）
 app.post('/api/admin/download-reservations/cleanup', authMiddleware, adminMiddleware, (req, res) => {
   try {
-    const keepDays = Math.min(365, Math.max(1, parseInt(req.body?.keep_days, 10) || 7));
+    // 默认 keep_days=0：立即清理全部已完成历史记录，避免“清理无效果”的感知
+    const rawKeepDays = req.body?.keep_days;
+    const parsedKeepDays = Number.isFinite(Number(rawKeepDays)) ? parseInt(rawKeepDays, 10) : 0;
+    const keepDays = Math.min(365, Math.max(0, Number.isFinite(parsedKeepDays) ? parsedKeepDays : 0));
     const expireResult = DownloadTrafficReservationDB.expirePendingReservations();
     const cleanupResult = DownloadTrafficReservationDB.cleanupFinalizedHistory(keepDays);
 
@@ -8860,7 +8863,7 @@ app.post('/api/admin/download-reservations/cleanup', authMiddleware, adminMiddle
 
     res.json({
       success: true,
-      message: '预扣清理完成',
+      message: `预扣清理完成（过期待确认 ${Number(expireResult?.changes || 0)} 条，删除历史 ${Number(cleanupResult?.changes || 0)} 条）`,
       result: {
         keep_days: keepDays,
         expired_pending: Number(expireResult?.changes || 0),
diff --git a/frontend/app.js b/frontend/app.js
index b6249d3..3d10379 100644
--- a/frontend/app.js
+++ b/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) {