Update migrated js to ts and shadcn

src/components/language-selector.tsx

@@ -0,0 +1,22 @@
+import React from 'react';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from './ui/select';
+import { Label } from './ui/label';
+
+const LanguageSelector = ({ currentLanguage, onLanguageChange, t }: any) => {
+  return (
+    <div className="flex items-center gap-2">
+      <Label className="text-sm font-medium">{t.language}:</Label>
+      <Select value={currentLanguage} onValueChange={onLanguageChange}>
+        <SelectTrigger className="w-32">
+          <SelectValue />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value="en">{t.english}</SelectItem>
+          <SelectItem value="de">{t.german}</SelectItem>
+        </SelectContent>
+      </Select>
+    </div>
+  );
+};
+
+export default LanguageSelector;