Fix proxy — auth routes bypass /api/ prefix

app/api/[...slug]/route.ts

@@ -7,20 +7,20 @@ async function handler(
   { params }: { params: Promise<{ slug: string[] }> }
 ) {
   const { slug } = await params;
-  const path = '/api/' + slug.join('/');
+  const slugPath = slug.join('/');
+
+  // Auth routes go directly without /api/ prefix
+  const isAuth = slugPath.startsWith('auth/');
+  const path = isAuth ? `/${slugPath}` : `/api/${slugPath}`;
+
   const url = `${API_BASE}${path}${request.nextUrl.search}`;
 
   const headers = new Headers();
-
-  // Forward content-type exactly (includes multipart boundary)
   const contentType = request.headers.get('content-type');
   if (contentType) headers.set('content-type', contentType);
-
-  // Forward session cookie
   const cookie = request.headers.get('cookie');
   if (cookie) headers.set('cookie', cookie);
 
-  // Forward body
   let body: BodyInit | undefined;
   if (request.method !== 'GET' && request.method !== 'HEAD') {
     body = await request.arrayBuffer();