feat(i18n): add danish localization

components/ui/flag-icons.tsx

@@ -201,6 +201,16 @@ export function FlagCS(props: FlagProps) {
   );
 }
 
+/** Danish flag - Red with a white cross */
+export function FlagDa(props: FlagProps) {
+  return (
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 37 28" width={W} height={H} className={flagClass} {...props}>
+      <path fill="#c8102e" d="M0,0H37V28H0Z" />
+      <path stroke="#fff" stroke-width="4" d="M0,14h37M14,0v28" />
+    </svg>
+  );
+}
+
 /** Map locale codes to flag components */
 export const flagComponents: Record<string, (props: FlagProps) => ReactElement> = {
   en: FlagGB,