fix(locale): align DE/EN component structures, fix dynamic language switcher slug mapping, and localize referenzen map

components/layout/LanguageSwitcher.tsx

@@ -3,6 +3,41 @@
 import { TransitionLink } from '@/components/ui/TransitionLink';
 import { usePathname } from 'next/navigation';
 import { HoverShineOverlay } from '@/components/ui/HoverShineOverlay';
+import enMessages from '@/messages/en.json';
+import deMessages from '@/messages/de.json';
+
+const getMessages = (locale: string) => {
+  return locale === 'de' ? deMessages : enMessages;
+};
+
+// Synchronous version of mapSlugToFileSlug
+function syncMapSlugToFileSlug(translatedSlug: string, locale: string): string {
+  const messages = getMessages(locale);
+  const slugs = messages.Slugs;
+
+  if (slugs.pages && translatedSlug in slugs.pages) {
+    return slugs.pages[translatedSlug as keyof typeof slugs.pages];
+  }
+  return translatedSlug;
+}
+
+// Synchronous version of mapFileSlugToTranslated
+function syncMapFileSlugToTranslated(fileSlug: string, locale: string): string {
+  const messages = getMessages(locale);
+  const slugs = messages.Slugs;
+
+  const sections = [slugs.pages];
+  for (const sectionData of sections) {
+    if (sectionData && typeof sectionData === 'object') {
+      for (const [translatedSlug, mappedSlug] of Object.entries(sectionData)) {
+        if (mappedSlug === fileSlug) {
+          return translatedSlug;
+        }
+      }
+    }
+  }
+  return fileSlug;
+}
 
 interface LanguageSwitcherProps {
   mobile?: boolean;
@@ -14,8 +49,23 @@ export function LanguageSwitcher({ mobile = false, isSolidMode = false }: Langua
   const currentLocale = pathname.startsWith('/en') ? 'en' : 'de';
 
   const getSwitchedUrl = (newLocale: string) => {
-    const pathWithoutLocale = pathname.replace(/^\/(en|de)/, '');
-    return `/${newLocale}${pathWithoutLocale === '' ? '' : pathWithoutLocale}`;
+    const segments = pathname.split('/').filter(Boolean);
+    if (segments.length === 0) {
+      return `/${newLocale}`;
+    }
+
+    const currentLoc = segments[0] === 'en' || segments[0] === 'de' ? segments[0] : 'de';
+    const hasLocale = segments[0] === 'en' || segments[0] === 'de';
+    const pathSegments = hasLocale ? segments.slice(1) : segments;
+
+    if (pathSegments.length === 1) {
+      const slug = pathSegments[0];
+      const fileSlug = syncMapSlugToFileSlug(slug, currentLoc);
+      const translatedSlug = syncMapFileSlugToTranslated(fileSlug, newLocale);
+      return `/${newLocale}/${translatedSlug}`;
+    }
+
+    return `/${newLocale}/${pathSegments.join('/')}`;
   };
 
   const locales = [