Add Turbopack resolveAlias for Prisma client to fix RSC crash

Without resolveAlias, Turbopack fails to resolve .prisma/client/default
and creates a temporary client reference, causing the toStringTag error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

next.config.ts

@@ -3,7 +3,14 @@ import type { NextConfig } from "next";
 const nextConfig: NextConfig = {
   output: "standalone",
   transpilePackages: ["unified", "remark-parse"],
-  serverExternalPackages: ["@prisma/client", "@prisma/adapter-pg", "pg"],
+  serverExternalPackages: ["@prisma/client", "pg"],
+  experimental: {
+    turbo: {
+      resolveAlias: {
+        ".prisma/client/default": "./node_modules/.prisma/client/default.js",
+      },
+    },
+  },
 };
 
 export default nextConfig;