the cleanup

app/builds/[buildId]/page.tsx

@@ -3,7 +3,7 @@ import Link from "next/link";
 import { notFound } from "next/navigation";
 
 const API_BASE_URL =
-  process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://localhost:8080";
+  process.env.NEXT_PUBLIC_API_BASE_URL ?? "";
 
 function formatMoney(n?: number | null) {
   if (n == null) return "—";

app/builds/page.tsx

@@ -57,7 +57,7 @@ type BuildFeedCardDto = {
 };
 
 const API_BASE_URL =
-  process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://localhost:8080";
+  process.env.NEXT_PUBLIC_API_BASE_URL ?? "";
 
 // --- UI Filter Sets (keep; we’ll generate options from data too) ---
 const CLASS_FILTERS: (BuildClass | "all")[] = ["all", "Rifle", "Pistol", "NFA"];