From 575b5be0bf732689106ab4c51cd4b6423ac38876 Mon Sep 17 00:00:00 2001
From: dsh <dsh@lmve.net>
Date: Mon, 17 Aug 2026 23:10:54 -0400
Subject: [PATCH] =?UTF-8?q?fix:=20=E7=A9=BA=20UA=20=E6=98=BE=E7=A4=BA?=
 =?UTF-8?q?=E4=B8=BA=E6=9C=AA=E7=9F=A5=E8=AE=BE=E5=A4=87=EF=BC=9B=E6=97=A7?=
 =?UTF-8?q?=E8=AE=B0=E5=BD=95=E5=9C=B0=E5=8C=BA=E5=B7=B2=E5=9B=9E=E5=A1=AB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 internal/web/handlers/speedtest.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/web/handlers/speedtest.go b/internal/web/handlers/speedtest.go
index e91cf3a..0341762 100644
--- a/internal/web/handlers/speedtest.go
+++ b/internal/web/handlers/speedtest.go
@@ -233,6 +233,9 @@ func truncate(s string, n int) string {
 
 // parseBrowser 从 User-Agent 解析简短的浏览器 + 系统信息，如 "Chrome · Windows"
 func parseBrowser(ua string) string {
+	if ua == "" {
+		return "" // 历史记录无 UA
+	}
 	lower := strings.ToLower(ua)
 
 	browser := "其他"