diff --git a/docs/BACKOFFICE-AUDIT.md b/docs/BACKOFFICE-AUDIT.md
index 18c6348..88d2fa8 100644
--- a/docs/BACKOFFICE-AUDIT.md
+++ b/docs/BACKOFFICE-AUDIT.md
@@ -1,3 +1,4 @@
 # Docs moved to totalDoc
 
 See [totalDoc/INDEX.md](../../totalDoc/INDEX.md) for all documentation.
+ 
\ No newline at end of file
diff --git a/src/BackOffice/Common/Utilities/CsvExportHelper.cs b/src/BackOffice/Common/Utilities/CsvExportHelper.cs
index 6e6b4cf..f0943f5 100644
--- a/src/BackOffice/Common/Utilities/CsvExportHelper.cs
+++ b/src/BackOffice/Common/Utilities/CsvExportHelper.cs
@@ -1,31 +1,35 @@
 using System.Globalization;
+using System.Net;
 using System.Text;
 
 namespace BackOffice.Common.Utilities;
 
 /// <summary>
-/// خروجی CSV سازگار با Excel (UTF-8 BOM + sep=, + اعداد بدون جداکننده هزارگان).
+/// خروجی سازگار با Excel فارسی:
+/// - XML Spreadsheet (.xls) برای ستون‌بندی مطمئن + متن فارسی
+/// - CSV با جداکننده ; به‌عنوان جایگزین سبک
 /// </summary>
 public static class CsvExportHelper
 {
-    public const char Separator = ',';
+    /// <summary>جداکننده پیش‌فرض ویندوز فارسی برای CSV.</summary>
+    public const char Separator = ';';
 
     public static string Escape(string? value)
     {
         if (string.IsNullOrEmpty(value))
             return string.Empty;
 
-        if (value.Contains(Separator) || value.Contains('"') || value.Contains('\n') || value.Contains('\r'))
-            return $"\"{value.Replace("\"", "\"\"")}\"";
-
-        return value;
+        // همیشه quote تا Excel فارسی ستون را نشکند
+        return $"\"{value.Replace("\"", "\"\"")}\"";
     }
 
     public static string Cell(object? value) => value switch
     {
-        null => string.Empty,
+        null => Escape(string.Empty),
         string s => Escape(s),
         bool b => b ? "1" : "0",
+        byte or sbyte or short or ushort or int or uint or long or ulong or float or double or decimal
+            => Convert.ToString(value, CultureInfo.InvariantCulture) ?? "0",
         IFormattable f => Escape(f.ToString(null, CultureInfo.InvariantCulture) ?? string.Empty),
         _ => Escape(Convert.ToString(value, CultureInfo.InvariantCulture))
     };
@@ -47,11 +51,95 @@ public static class CsvExportHelper
         return "—";
     }
 
-    public static string ToBase64(StringBuilder bodyWithoutSepHint)
+    public static string ToBase64(StringBuilder body)
     {
-        // Excel در لوکال فارسی با این خط، جداکننده کاما را درست تشخیص می‌دهد
-        var content = "sep=," + Environment.NewLine + bodyWithoutSepHint;
-        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(content)).ToArray();
+        // CRLF صریح — Excel روی ویندوز با \n لینوکس گاهی به‌هم می‌ریزد
+        var text = body.ToString().Replace("\r\n", "\n").Replace("\r", "\n").Replace("\n", "\r\n");
+        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(text)).ToArray();
         return Convert.ToBase64String(bytes);
     }
+
+    /// <summary>
+    /// خروجی SpreadsheetML که Excel به‌صورت ستون‌ستون و با UTF-8 درست باز می‌کند.
+    /// فایل را با پسوند .xls ذخیره کنید.
+    /// </summary>
+    public static string ToExcelXmlBase64(string sheetName, IReadOnlyList<string> headers, IEnumerable<object?[]> rows)
+    {
+        var sb = new StringBuilder();
+        sb.AppendLine(@"<?xml version=""1.0"" encoding=""UTF-8""?>");
+        sb.AppendLine(@"<?mso-application progid=""Excel.Sheet""?>");
+        sb.AppendLine(@"<Workbook xmlns=""urn:schemas-microsoft-com:office:spreadsheet""");
+        sb.AppendLine(@" xmlns:o=""urn:schemas-microsoft-com:office:office""");
+        sb.AppendLine(@" xmlns:x=""urn:schemas-microsoft-com:office:excel""");
+        sb.AppendLine(@" xmlns:ss=""urn:schemas-microsoft-com:office:spreadsheet""");
+        sb.AppendLine(@" xmlns:html=""http://www.w3.org/TR/REC-html40"">");
+        sb.AppendLine(@"<Styles>");
+        sb.AppendLine(@"<Style ss:ID=""Header""><Font ss:Bold=""1""/></Style>");
+        sb.AppendLine(@"<Style ss:ID=""Text""><NumberFormat ss:Format=""@""/></Style>");
+        sb.AppendLine(@"</Styles>");
+        sb.Append("<Worksheet ss:Name=\"").Append(XmlEscape(sheetName)).AppendLine("\">");
+        sb.AppendLine("<Table>");
+
+        sb.AppendLine("<Row>");
+        foreach (var header in headers)
+        {
+            sb.Append("<Cell ss:StyleID=\"Header\"><Data ss:Type=\"String\">")
+              .Append(XmlEscape(header))
+              .AppendLine("</Data></Cell>");
+        }
+        sb.AppendLine("</Row>");
+
+        foreach (var row in rows)
+        {
+            sb.AppendLine("<Row>");
+            foreach (var cell in row)
+                AppendExcelCell(sb, cell);
+            sb.AppendLine("</Row>");
+        }
+
+        sb.AppendLine("</Table>");
+        sb.AppendLine("</Worksheet>");
+        sb.AppendLine("</Workbook>");
+
+        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
+        return Convert.ToBase64String(bytes);
+    }
+
+    private static void AppendExcelCell(StringBuilder sb, object? value)
+    {
+        switch (value)
+        {
+            case null:
+                sb.AppendLine(@"<Cell ss:StyleID=""Text""><Data ss:Type=""String""></Data></Cell>");
+                break;
+            case string s:
+                sb.Append(@"<Cell ss:StyleID=""Text""><Data ss:Type=""String"">")
+                  .Append(XmlEscape(s))
+                  .AppendLine("</Data></Cell>");
+                break;
+            case bool b:
+                sb.Append(@"<Cell><Data ss:Type=""Boolean"">")
+                  .Append(b ? "1" : "0")
+                  .AppendLine("</Data></Cell>");
+                break;
+            case byte or sbyte or short or ushort or int or uint or long or ulong:
+                sb.Append(@"<Cell><Data ss:Type=""Number"">")
+                  .Append(Convert.ToString(value, CultureInfo.InvariantCulture))
+                  .AppendLine("</Data></Cell>");
+                break;
+            case float or double or decimal:
+                sb.Append(@"<Cell><Data ss:Type=""Number"">")
+                  .Append(Convert.ToString(value, CultureInfo.InvariantCulture))
+                  .AppendLine("</Data></Cell>");
+                break;
+            default:
+                sb.Append(@"<Cell ss:StyleID=""Text""><Data ss:Type=""String"">")
+                  .Append(XmlEscape(Convert.ToString(value, CultureInfo.InvariantCulture)))
+                  .AppendLine("</Data></Cell>");
+                break;
+        }
+    }
+
+    private static string XmlEscape(string? value) =>
+        WebUtility.HtmlEncode(value ?? string.Empty);
 }
diff --git a/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs b/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
index 50db2e1..abe5e7b 100644
--- a/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
+++ b/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
@@ -245,31 +245,32 @@ public partial class DiscountOrdersMainPage
 
         try
         {
-            var sb = new StringBuilder();
-            sb.AppendLine(CsvExportHelper.Row(
-                "شناسه", "نام مشتری", "موبایل", "مبلغ کل", "کیف پول اعتباری", "پرداخت درگاه",
-                "تعداد آیتم", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت", "تاریخ ثبت", "آدرس"));
-
-            foreach (var o in _orders)
+            var headers = new[]
             {
-                sb.AppendLine(CsvExportHelper.Row(
-                    o.Id,
-                    CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId),
-                    o.UserMobile,
-                    o.TotalPrice,
-                    o.DiscountBalanceUsed,
-                    o.GatewayAmount,
-                    o.ItemsCount,
-                    GetPaymentStatusText(o.PaymentStatusValue),
-                    GetStatusText(o.Status),
-                    o.PaymentDate?.MiladiToJalaliWithTime() ?? "-",
-                    o.Created?.MiladiToJalaliWithTime() ?? "-",
-                    o.ShippingAddress ?? "-"));
-            }
+                "شناسه", "نام مشتری", "موبایل", "مبلغ کل", "کیف پول اعتباری", "پرداخت درگاه",
+                "تعداد آیتم", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت", "تاریخ ثبت", "آدرس"
+            };
 
-            var filename = $"discount-orders-{DateTime.Now:yyyyMMddHHmmss}.csv";
-            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
-            Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
+            var rows = _orders.Select(o => new object?[]
+            {
+                o.Id,
+                CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId),
+                o.UserMobile ?? "",
+                o.TotalPrice,
+                o.DiscountBalanceUsed,
+                o.GatewayAmount,
+                o.ItemsCount,
+                GetPaymentStatusText(o.PaymentStatusValue),
+                GetStatusText(o.Status),
+                o.PaymentDate?.MiladiToJalaliWithTime() ?? "-",
+                o.Created?.MiladiToJalaliWithTime() ?? "-",
+                o.ShippingAddress ?? "-"
+            });
+
+            var filename = $"discount-orders-{DateTime.Now:yyyyMMddHHmmss}.xls";
+            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename,
+                CsvExportHelper.ToExcelXmlBase64("سفارش‌های اعتباری", headers, rows));
+            Snackbar.Add("خروجی Excel آماده شد.", Severity.Success);
         }
         catch (Exception ex)
         {
diff --git a/src/BackOffice/Pages/DiscountShop/SalesReports.razor b/src/BackOffice/Pages/DiscountShop/SalesReports.razor
index fc65969..5e05c9c 100644
--- a/src/BackOffice/Pages/DiscountShop/SalesReports.razor
+++ b/src/BackOffice/Pages/DiscountShop/SalesReports.razor
@@ -530,26 +530,31 @@
             return;
         }
 
-        var sb = new StringBuilder();
-        sb.AppendLine(CsvExportHelper.Row(
-            "شناسه", "نام مشتری", "موبایل", "تاریخ ثبت", "تعداد آیتم", "مبلغ نهایی", "تخفیف", "وضعیت"));
-
-        foreach (var o in _orders.Where(o => o.Created.HasValue).OrderBy(o => o.Created))
+        var headers = new[]
         {
-            sb.AppendLine(CsvExportHelper.Row(
+            "شناسه", "نام مشتری", "موبایل", "تاریخ ثبت", "تعداد آیتم", "مبلغ نهایی", "تخفیف", "وضعیت"
+        };
+
+        var rows = _orders
+            .OrderBy(o => o.Created ?? o.PaymentDate ?? DateTime.MaxValue)
+            .Select(o => new object?[]
+            {
                 o.Id,
                 CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId),
-                o.UserMobile,
-                o.Created?.MiladiToJalaliWithTime() ?? "-",
+                o.UserMobile ?? "",
+                o.Created?.MiladiToJalaliWithTime()
+                    ?? o.PaymentDate?.MiladiToJalaliWithTime()
+                    ?? "-",
                 o.ItemsCount,
                 o.GatewayAmount,
                 o.DiscountBalanceUsed,
-                GetStatusText(o.Status)));
-        }
+                GetStatusText(o.Status)
+            });
 
-        var filename = $"discount-sales-{DateTime.Now:yyyyMMddHHmmss}.csv";
-        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
-        Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
+        var filename = $"discount-sales-{DateTime.Now:yyyyMMddHHmmss}.xls";
+        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename,
+            CsvExportHelper.ToExcelXmlBase64("گزارش فروش اعتباری", headers, rows));
+        Snackbar.Add("خروجی Excel آماده شد.", Severity.Success);
     }
 
     private async Task ExportToPdf()
diff --git a/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs b/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
index 4fe7a70..504cfed 100644
--- a/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
+++ b/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
@@ -244,25 +244,26 @@ public partial class OrderSalesReports
             return;
         }
 
-        var sb = new StringBuilder();
-        sb.AppendLine(CsvExportHelper.Row(
-            "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت"));
-
-        foreach (var o in _orders)
+        var headers = new[]
         {
-            sb.AppendLine(CsvExportHelper.Row(
-                o.Id,
-                o.UserId,
-                CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
-                o.Amount,
-                o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده",
-                GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
-                o.PaymentDate != null ? o.PaymentDate.ToDateTime().MiladiToJalaliWithTime() : "-"));
-        }
+            "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت"
+        };
 
-        var filename = $"store-sales-{DateTime.Now:yyyyMMddHHmmss}.csv";
-        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
-        Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
+        var rows = _orders.Select(o => new object?[]
+        {
+            o.Id,
+            o.UserId,
+            CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
+            o.Amount,
+            o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده",
+            GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
+            o.PaymentDate != null ? o.PaymentDate.ToDateTime().MiladiToJalaliWithTime() : "-"
+        });
+
+        var filename = $"store-sales-{DateTime.Now:yyyyMMddHHmmss}.xls";
+        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename,
+            CsvExportHelper.ToExcelXmlBase64("گزارش فروش", headers, rows));
+        Snackbar.Add("خروجی Excel آماده شد.", Severity.Success);
     }
 
     protected async Task ExportToPdf()
diff --git a/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs b/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
index 04aaeb4..55b161c 100644
--- a/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
+++ b/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
@@ -329,26 +329,27 @@ public partial class UserOrderMainPage
                 return;
             }
 
-            var sb = new StringBuilder();
-            sb.AppendLine(CsvExportHelper.Row(
-                "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "روش پرداخت", "تاریخ پرداخت"));
-
-            foreach (var o in result.Models)
+            var headers = new[]
             {
-                sb.AppendLine(CsvExportHelper.Row(
-                    o.Id,
-                    o.UserId,
-                    CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
-                    o.Amount,
-                    GetPaymentStatusText(o.PaymentStatus.GetHashCode()),
-                    GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
-                    GetPaymentMethodText(o.PaymentMethod.GetHashCode()),
-                    o.PaymentDate?.ToDateTime().ToLocalTime().MiladiToJalaliWithTime() ?? "-"));
-            }
+                "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "روش پرداخت", "تاریخ پرداخت"
+            };
 
-            var filename = $"user-orders-{DateTime.Now:yyyyMMddHHmmss}.csv";
-            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
-            Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
+            var rows = result.Models.Select(o => new object?[]
+            {
+                o.Id,
+                o.UserId,
+                CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
+                o.Amount,
+                GetPaymentStatusText(o.PaymentStatus.GetHashCode()),
+                GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
+                GetPaymentMethodText(o.PaymentMethod.GetHashCode()),
+                o.PaymentDate?.ToDateTime().ToLocalTime().MiladiToJalaliWithTime() ?? "-"
+            });
+
+            var filename = $"user-orders-{DateTime.Now:yyyyMMddHHmmss}.xls";
+            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename,
+                CsvExportHelper.ToExcelXmlBase64("سفارش‌ها", headers, rows));
+            Snackbar.Add("خروجی Excel آماده شد.", Severity.Success);
         }
         catch (Exception ex)
         {