diff --git a/next.config.ts b/next.config.ts
index 6fded8b..437d8b4 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -3,7 +3,6 @@ import type { NextConfig } from "next";
 const nextConfig: NextConfig = {
   transpilePackages: ['@tldraw/tldraw'],
   output: 'export',
-  trailingSlash: true,
   eslint: { ignoreDuringBuilds: true },
   typescript: { ignoreBuildErrors: true },
   webpack: (config, { isServer }) => {
diff --git a/src/app/project-builder/page.tsx b/src/app/project-builder/page.tsx
index 46beb18..99393ab 100644
--- a/src/app/project-builder/page.tsx
+++ b/src/app/project-builder/page.tsx
@@ -1,7 +1,26 @@
-import { Suspense } from "react"
+"use client"
+
+import { Suspense, useEffect } from "react"
+import { useRouter } from "next/navigation"
 import { MainDashboard } from "@/components/main-dashboard"
+import { useAuth } from "@/contexts/auth-context"
 
 export default function ProjectBuilderPage() {
+  const router = useRouter()
+  const { user, isLoading } = useAuth()
+
+  useEffect(() => {
+    if (isLoading) return
+    if (!user) {
+      const returnUrl = encodeURIComponent("/project-builder")
+      router.replace(`/signin?returnUrl=${returnUrl}`)
+    }
+  }, [user, isLoading, router])
+
+  if (isLoading || !user) {
+    return <div className="min-h-screen flex items-center justify-center">Loading...</div>
+  }
+
   return (
     <Suspense fallback={<div>Loading...</div>}>
       <MainDashboard />