Implementiere i18n für Frontend, Admin und Datenbank

components/LanguageSwitcher.tsx

@@ -0,0 +1,59 @@
+'use client';
+
+import { usePathname, useRouter } from '@/lib/navigation';
+import { useLocale } from 'next-intl';
+
+export default function LanguageSwitcher() {
+    const locale = useLocale();
+    const router = useRouter();
+    const pathname = usePathname();
+
+    const switchLocale = (newLocale: 'de' | 'en') => {
+        router.replace(pathname, { locale: newLocale });
+    };
+
+    return (
+        <div style={{
+            display: 'flex',
+            background: '#f3f4f6',
+            borderRadius: '0.375rem',
+            padding: '0.25rem',
+            gap: '0.25rem'
+        }}>
+            <button
+                onClick={() => switchLocale('de')}
+                style={{
+                    padding: '0.375rem 0.75rem',
+                    background: locale === 'de' ? 'white' : 'transparent',
+                    border: 'none',
+                    borderRadius: '0.25rem',
+                    cursor: 'pointer',
+                    fontWeight: locale === 'de' ? '600' : '400',
+                    fontSize: '0.875rem',
+                    color: locale === 'de' ? '#111827' : '#6b7280',
+                    boxShadow: locale === 'de' ? '0 1px 2px rgba(0,0,0,0.05)' : 'none',
+                    transition: 'all 0.2s'
+                }}
+            >
+                DE
+            </button>
+            <button
+                onClick={() => switchLocale('en')}
+                style={{
+                    padding: '0.375rem 0.75rem',
+                    background: locale === 'en' ? 'white' : 'transparent',
+                    border: 'none',
+                    borderRadius: '0.25rem',
+                    cursor: 'pointer',
+                    fontWeight: locale === 'en' ? '600' : '400',
+                    fontSize: '0.875rem',
+                    color: locale === 'en' ? '#111827' : '#6b7280',
+                    boxShadow: locale === 'en' ? '0 1px 2px rgba(0,0,0,0.05)' : 'none',
+                    transition: 'all 0.2s'
+                }}
+            >
+                EN
+            </button>
+        </div>
+    );
+}