feat: migrate from Create React App to Vite

Rebuild the site on the stack the other converted sites share: Vite 8,
React 19, TypeScript 7, react-router 8, Biome and sanitize.css, with the
site data moved out of the bundle into static-contents/.

- base the database, credits and pico code on cerebellum.neuroinf.jp,
  keeping this site's item types, rankings and menus
- port the MediaWiki pages to function components
- serve all module data from modules/, redirecting the old download and
  /database/file URLs
- tile the plate texture and keep form controls on white
- track page views with GA4

src/common/XoopsPathRedirect.tsx

@@ -1,40 +1,30 @@
-import React, { Component } from 'react';
-import { Redirect, RouteComponentProps } from 'react-router';
-import { MultiLang } from '../config';
+import { Navigate, useLocation } from 'react-router';
+import type { MultiLang } from '../config';
 import PageNotFound from './lib/PageNotFound';
 
-interface Params {
-    module: string;
-    pathname: string;
-}
-
-interface Props extends RouteComponentProps<Params> {
+interface Props {
     lang: MultiLang;
 }
 
-class XoopsPathRedirect extends Component<Props> {
-
-    getRedirectUrl() {
-        const { pathname } = this.props.location;
-        switch (pathname || '') {
-            case '/index.php': {
-                return '/';
-            }
-        }
-        return '';
+const getRedirectUrl = (pathname: string): string => {
+    switch (pathname || '') {
+        case '/index.php':
+            return '/';
     }
+    return '';
+};
 
-    render() {
-        const { lang } = this.props;
-        if (this.props.location.pathname === '/') {
-            return null;
-        }
-        const url = this.getRedirectUrl();
-        if (url === '') {
-            return <PageNotFound lang={lang} />;
-        }
-        return <Redirect to={url} />;
+const XoopsPathRedirect = (props: Props) => {
+    const { lang } = props;
+    const location = useLocation();
+    if (location.pathname === '/') {
+        return null;
     }
-}
+    const url = getRedirectUrl(location.pathname);
+    if (url === '') {
+        return <PageNotFound lang={lang} />;
+    }
+    return <Navigate to={url} replace />;
+};
 
 export default XoopsPathRedirect;