From 75d4d40d39637a0639922f1fa588810d4bd645b7 Mon Sep 17 00:00:00 2001
From: R2m1liA <15258427350@163.com>
Date: Sat, 25 Oct 2025 15:30:23 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E6=94=B9=E6=96=87=E4=BB=B6?=
 =?UTF-8?q?=E6=8B=93=E5=B1=95=E5=90=8D=E8=8E=B7=E5=8F=96=E9=80=BB=E8=BE=91?=
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- 若无扩展名则返回空字符串
---
 app/utils/file.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/utils/file.ts b/app/utils/file.ts
index f21e33a..0193c98 100644
--- a/app/utils/file.ts
+++ b/app/utils/file.ts
@@ -11,7 +11,9 @@ export function formatFileSize(sizeInBytes: number): string {
 }
 
 export function getFileExtension(filename: string): string {
-  return filename.split('.').pop() || '';
+  const lastDotIndex = filename.lastIndexOf('.');
+  if (lastDotIndex === -1) return ''; // 找不到拓展名
+  return filename.slice(lastDotIndex + 1);
 }
 
 export function formatFileExtension(ext: string): string {