woof. killed useClient and use nextjs api

app/(app)/(builder)/builder/page.tsx

@@ -74,8 +74,7 @@ const isUuid = (v: string) =>
     v
   );
 
-const API_BASE_URL =
-  process.env.NEXT_PUBLIC_API_BASE_URL ?? "";
+// API routes now handled by Next.js /api routes (server-side)
 
 const STORAGE_KEY = "gunbuilder-build-state";
 
@@ -337,8 +336,8 @@ function GunbuilderPageContent() {
 
   const api = useApi();
 
-  // ✅ Auth: we need the token ready before calling /builds/me/*
-  const { token, loading: authLoading, getAuthHeaders } = useAuth();
+  // ✅ Auth: check if user is logged in
+  const { user, loading: authLoading } = useAuth();
 
   const [platform, setPlatform] = useState<(typeof PLATFORMS)[number]>("AR15");
 
@@ -616,7 +615,7 @@ function GunbuilderPageContent() {
 
       try {
         const res = await fetch(
-          `${API_BASE_URL}/api/v1/catalog/products/by-ids`,
+          `/api/catalog/products/by-ids`,
           {
             method: "POST",
             signal: controller.signal,
@@ -728,7 +727,7 @@ function GunbuilderPageContent() {
     if (authLoading) return;
 
     // If not logged in, don't spam the backend; show a helpful message instead.
-    if (!token) {
+    if (!user) {
       setShareStatus("Please log in to load builds from your Vault.");
       window.setTimeout(() => setShareStatus(null), 4500);
       return;
@@ -738,14 +737,12 @@ function GunbuilderPageContent() {
       try {
         setShareStatus("Loading build…");
 
-        // NOTE: using fetch here avoids any “stale api instance” issues and lets us
-        // explicitly attach JWT headers.
+        // NOTE: using fetch here goes through our Next.js API routes with HTTP-only cookies
         const res = await fetch(
-          `${API_BASE_URL}/api/v1/builds/me/${encodeURIComponent(uuidToLoad)}`,
+          `/api/builds/${encodeURIComponent(uuidToLoad)}`,
           {
             headers: {
               "Content-Type": "application/json",
-              ...getAuthHeaders(),
             },
           }
         );
@@ -787,9 +784,7 @@ function GunbuilderPageContent() {
     searchParams,
     router,
     authLoading,
-    token,
-    getAuthHeaders,
-    // API_BASE_URL is a module constant; no need to include
+    user,
   ]);
 
   // -----------------------------