diff --git a/frontend/src/components/FileList.tsx b/frontend/src/components/FileList.tsx
index ccb3b20..9df0b70 100644
--- a/frontend/src/components/FileList.tsx
+++ b/frontend/src/components/FileList.tsx
@@ -1,5 +1,6 @@
-import { useRef } from "react";
+import { useRef, useState } from "react";
 import { toast } from "sonner";
+import { Eye, Download, Trash2, X, FileText, Image as ImageIcon, ExternalLink } from "lucide-react";
 import type { Attachment } from "../lib/types";
 
 export interface FileListProps {
@@ -14,9 +15,18 @@ export interface FileListProps {
   label?: string;
 }
 
-// مدیریت چند فاکتور: آپلود مستقیم به سرور (MinIO) + دانلود/حذف فایل‌های ذخیره‌شده
+const isImageFile = (name: string = "") => {
+  return /\.(jpe?g|png|webp|gif|svg|bmp)$/i.test(name.toLowerCase());
+};
+
+const isPdfFile = (name: string = "") => {
+  return /\.pdf$/i.test(name.toLowerCase());
+};
+
+// مدیریت چند فاکتور: آپلود مستقیم، پیش‌نمایش آنلاین تصویر/PDF و دانلود
 export function FileList({ files, onChange, upload, onDelete, urlOf, label = "افزودن فاکتور" }: FileListProps) {
   const inputRef = useRef<HTMLInputElement | null>(null);
+  const [previewItem, setPreviewItem] = useState<{ url: string; name: string } | null>(null);
 
   const remove = (i: number) => {
     const removed = files[i];
@@ -39,22 +49,94 @@ export function FileList({ files, onChange, upload, onDelete, urlOf, label = "ا
     if (added.length) onChange([...files, ...added]);
   };
 
+  const handleOpenPreview = (inv: Attachment) => {
+    const url = urlOf?.(inv);
+    if (!url) {
+      toast.error("فایل هنوز به طور کامل در سرور ذخیره نشده است");
+      return;
+    }
+    setPreviewItem({ url, name: inv.name });
+  };
+
   return (
-    <div>
-      {!files.length && <div className="inv-empty">هنوز فایلی انتخاب نشده است.</div>}
-      {files.map((inv, i) => (
-        <div key={i} className="inv-row">
-          <span className="inv-name">📎 {inv.name}</span>
-          {urlOf?.(inv) && (
-            <a className="inv-open" href={urlOf(inv)!} download={inv.name} title="دانلود">
-              ↓
-            </a>
-          )}
-          <button type="button" className="inv-x" title="حذف" onClick={() => remove(i)}>
-            ×
-          </button>
+    <div className="space-y-2">
+      {!files.length && (
+        <div className="rounded-lg border border-dashed border-gray-200 bg-gray-50/60 p-3 text-center text-xs text-gray-500">
+          هنوز فاکتور یا سندی بارگذاری نشده است.
         </div>
-      ))}
+      )}
+
+      {files.length > 0 && (
+        <div className="flex flex-col gap-1.5">
+          {files.map((inv, i) => {
+            const url = urlOf?.(inv);
+            const isImg = isImageFile(inv.name);
+            const isPdf = isPdfFile(inv.name);
+
+            return (
+              <div
+                key={inv.id || i}
+                className="flex items-center justify-between rounded-lg border border-gray-200 bg-white px-3 py-2 text-xs transition-colors hover:border-gray-300 shadow-xs"
+              >
+                {/* نام و آیکون فایل — با قابلیت کلیک برای پیش‌نمایش */}
+                <div
+                  className={`flex items-center gap-2 min-w-0 flex-1 ${url ? "cursor-pointer group" : ""}`}
+                  onClick={() => url && handleOpenPreview(inv)}
+                  title={url ? "مشاهده پیش‌نمایش" : inv.name}
+                >
+                  {isImg ? (
+                    <ImageIcon className="h-4 w-4 shrink-0 text-blue-600" />
+                  ) : isPdf ? (
+                    <FileText className="h-4 w-4 shrink-0 text-rose-600" />
+                  ) : (
+                    <FileText className="h-4 w-4 shrink-0 text-gray-400" />
+                  )}
+                  <span className="truncate font-medium text-gray-700 group-hover:text-blue-600 transition-colors">
+                    {inv.name}
+                  </span>
+                </div>
+
+                {/* دکمه‌های عملیات: پیش‌نمایش، دانلود مستقیم، حذف */}
+                <div className="flex items-center gap-1 shrink-0 me-1">
+                  {url && (
+                    <>
+                      <button
+                        type="button"
+                        onClick={() => handleOpenPreview(inv)}
+                        className="flex h-7 w-7 items-center justify-center rounded-md text-gray-500 hover:bg-blue-50 hover:text-blue-600 transition-colors"
+                        title="مشاهده فاکتور"
+                      >
+                        <Eye className="h-3.5 w-3.5" />
+                      </button>
+
+                      <a
+                        href={url}
+                        download={inv.name}
+                        target="_blank"
+                        rel="noreferrer"
+                        className="flex h-7 w-7 items-center justify-center rounded-md text-gray-500 hover:bg-gray-100 hover:text-gray-900 transition-colors"
+                        title="دانلود فایل"
+                      >
+                        <Download className="h-3.5 w-3.5" />
+                      </a>
+                    </>
+                  )}
+
+                  <button
+                    type="button"
+                    className="flex h-7 w-7 items-center justify-center rounded-md text-gray-400 hover:bg-red-50 hover:text-red-600 transition-colors"
+                    title="حذف فایل"
+                    onClick={() => remove(i)}
+                  >
+                    <Trash2 className="h-3.5 w-3.5" />
+                  </button>
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      )}
+
       <div>
         <input
           ref={inputRef}
@@ -64,10 +146,105 @@ export function FileList({ files, onChange, upload, onDelete, urlOf, label = "ا
           className="hidden"
           onChange={handleChange}
         />
-        <button type="button" className="btn-line-file" onClick={() => inputRef.current?.click()}>
-          ＋ {label}
+        <button
+          type="button"
+          className="inline-flex items-center gap-1.5 rounded-lg border border-dashed border-gray-300 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 hover:border-blue-500 hover:bg-blue-50/40 hover:text-blue-600 transition-all"
+          onClick={() => inputRef.current?.click()}
+        >
+          <span>＋</span>
+          <span>{label}</span>
         </button>
       </div>
+
+      {/* پنجره مودال پیش‌نمایش (Preview Modal) */}
+      {previewItem && (
+        <div
+          className="fixed inset-0 z-[80] flex items-center justify-center bg-black/60 p-3 sm:p-5 backdrop-blur-xs animate-in fade-in duration-200"
+          onClick={() => setPreviewItem(null)}
+        >
+          <div
+            className="flex flex-col w-full max-w-4xl max-h-[90vh] rounded-2xl border border-gray-200 bg-white shadow-2xl overflow-hidden"
+            onClick={(e) => e.stopPropagation()}
+          >
+            {/* هدر پیش‌نمایش */}
+            <div className="flex items-center justify-between border-b border-gray-100 px-4 py-3 bg-white">
+              <div className="flex items-center gap-2 min-w-0">
+                {isImageFile(previewItem.name) ? (
+                  <ImageIcon className="h-4 w-4 shrink-0 text-blue-600" />
+                ) : (
+                  <FileText className="h-4 w-4 shrink-0 text-rose-600" />
+                )}
+                <span className="text-xs sm:text-sm font-bold text-gray-900 truncate">
+                  {previewItem.name}
+                </span>
+              </div>
+
+              <div className="flex items-center gap-1.5 shrink-0">
+                <a
+                  href={previewItem.url}
+                  download={previewItem.name}
+                  className="inline-flex items-center gap-1 rounded-lg border border-gray-200 bg-white px-2.5 py-1 text-xs font-semibold text-gray-700 hover:bg-gray-50 hover:text-gray-900 transition-colors shadow-2xs"
+                  title="دانلود فاکتور"
+                >
+                  <Download className="h-3.5 w-3.5" />
+                  <span className="hidden xs:inline">دانلود فاکتور</span>
+                </a>
+
+                <a
+                  href={previewItem.url}
+                  target="_blank"
+                  rel="noreferrer"
+                  className="flex h-7 w-7 items-center justify-center rounded-lg border border-gray-200 text-gray-600 hover:bg-gray-50 hover:text-gray-900 transition-colors shadow-2xs"
+                  title="باز کردن در برگه جدید"
+                >
+                  <ExternalLink className="h-3.5 w-3.5" />
+                </a>
+
+                <button
+                  type="button"
+                  onClick={() => setPreviewItem(null)}
+                  className="flex h-7 w-7 items-center justify-center rounded-lg text-gray-400 hover:bg-gray-100 hover:text-gray-700 transition-colors ms-1"
+                  title="بستن"
+                >
+                  <X className="h-4 w-4" />
+                </button>
+              </div>
+            </div>
+
+            {/* بدنه نمایش فایل */}
+            <div className="flex-1 overflow-auto p-3 sm:p-4 bg-gray-50/70 flex items-center justify-center min-h-[300px]">
+              {isImageFile(previewItem.name) ? (
+                <img
+                  src={previewItem.url}
+                  alt={previewItem.name}
+                  className="max-h-[75vh] w-auto max-w-full rounded-lg object-contain shadow-xs border border-gray-200 bg-white"
+                />
+              ) : isPdfFile(previewItem.name) ? (
+                <iframe
+                  src={previewItem.url}
+                  title={previewItem.name}
+                  className="h-[75vh] w-full rounded-lg border border-gray-200 bg-white shadow-xs"
+                />
+              ) : (
+                <div className="flex flex-col items-center justify-center gap-3 p-8 text-center bg-white rounded-xl border border-gray-200 shadow-xs">
+                  <FileText className="h-12 w-12 text-gray-400" />
+                  <div className="text-xs text-gray-600">
+                    امکان نمایش پیش‌نمایش زنده برای این فرمت فایل وجود ندارد.
+                  </div>
+                  <a
+                    href={previewItem.url}
+                    download={previewItem.name}
+                    className="inline-flex items-center gap-1.5 rounded-lg bg-blue-600 px-3.5 py-1.5 text-xs font-semibold text-white hover:bg-blue-700 transition-colors"
+                  >
+                    <Download className="h-3.5 w-3.5" />
+                    دانلود فایل
+                  </a>
+                </div>
+              )}
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
-}
+}
\ No newline at end of file