fix(nav): redirect /blueprints to /admin/blueprints (#52)

Prevents a confusing 404 when users navigate directly to /blueprints.
Mirrors the existing /login → /auth/signin redirect pattern.

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/next.config.ts

@@ -22,6 +22,8 @@ const nextConfig: NextConfig = {
     return [
       // Common URL alias — redirect to the real auth entry point
       { source: "/login", destination: "/auth/signin", permanent: true },
+      // Common shorthand — redirect to the admin blueprints management page
+      { source: "/blueprints", destination: "/admin/blueprints", permanent: true },
     ];
   },
   async headers() {