feat(i18n): convert portfolio lists to bilingual schemas and resolve localized values

components/references-detail-content.tsx

@@ -1,14 +1,17 @@
-import Link from "next/link";
+import { Link } from "@/i18n/routing";
 import { ReferenceCards } from "@/components/reference-cards";
+import { useTranslations } from "next-intl";
 
 export function ReferencesDetailContent() {
+  const t = useTranslations("About");
+
   return (
     <section className="flex h-full flex-col gap-4 overflow-y-auto">
       <Link
         href="/about"
         className="inline-flex w-fit items-center rounded-sm border border-border px-3 py-1.5 text-sm text-muted-foreground transition-colors hover:text-foreground"
       >
-        {"<- Hakkımda'ya dön"}
+        {t("backToAbout")}
       </Link>
 
       <ReferenceCards