移除返回旧版入口和相关代码

client/src/pages/Home.tsx

@@ -32,7 +32,6 @@ import {
   Sliders,
   Activity,
   Gauge,
-  Undo2,
   Bluetooth,
   SkipBack,
   SkipForward,
@@ -876,15 +875,6 @@ export default function Home() {
             thumbnail={`${import.meta.env.BASE_URL}images/vu/vu${(ds.vu ?? 0) + 1}.png`}
             onClick={() => setLocation("/vu")}
           />
-          <ListRow
-            icon={<Undo2 size={18} />}
-            label={homeText.backToLegacy ?? "返回旧版"}
-            onClick={() => {
-              const target = ip.trim();
-              if (!target) return;
-              window.location.href = `https://am.luxsinaudio.com/x8/i.html?ip=${encodeURIComponent(target)}#/home`;
-            }}
-          />
           <ListRow
             icon={<BookOpenCheck size={18} />}
             label={homeText.changelog ?? "更新说明"}