i18n 代码进入URL路由，优化重定向规则

src/app/layout.tsx

@@ -1,50 +0,0 @@
-import type { Metadata, Viewport } from "next";
-import "./globals.css";
-import { SiteFooter } from "@/components/layout/site-footer";
-import { SiteHeader } from "@/components/layout/site-header";
-
-export const metadata: Metadata = {
-  title: {
-    default: "基沃托斯铁道公团 KivotosRailway",
-    template: "%s | 基沃托斯铁道公团 KivotosRailway",
-  },
-  description: "Kivotos Railway website",
-  icons: {
-    icon: "/icon/icon.svg",
-  },
-};
-
-export const viewport: Viewport = {
-  width: "device-width",
-  initialScale: 1,
-};
-
-export default function RootLayout({
-  children,
-}: Readonly<{ children: React.ReactNode }>) {
-  return (
-    <html lang="zh-CN" suppressHydrationWarning>
-      <head>
-        {/* Run during HTML parsing, before the body can paint. */}
-        <script
-          id="theme-preference"
-          dangerouslySetInnerHTML={{ __html: `(() => {
-            const isTheme = (value) => value === 'light' || value === 'system' || value === 'dark';
-            let preference = 'system';
-            try {
-              const cookieTheme = document.cookie.split(';').map((entry) => entry.trim()).find((entry) => entry.startsWith('kr-theme='))?.slice('kr-theme='.length);
-              const savedTheme = isTheme(cookieTheme) ? cookieTheme : localStorage.getItem('kr-theme');
-              if (isTheme(savedTheme)) preference = savedTheme;
-            } catch {}
-            const theme = preference === 'system' ? (matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light') : preference;
-            document.documentElement.dataset.theme = theme;
-            document.documentElement.style.colorScheme = theme;
-          })();` }}
-        />
-      </head>
-      <body>
-        <SiteHeader />{children}<SiteFooter />
-      </body>
-    </html>
-  );
-}