Harden authentication, tenant isolation and security boundaries

next.config.ts

@@ -1,12 +1,33 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
+  output: "standalone",
+  experimental: { serverActions: { bodySizeLimit: "26mb" } },
+  async headers() {
+    return [{ source: "/:path*", headers: [
+      { key: "X-Content-Type-Options", value: "nosniff" },
+      { key: "X-Frame-Options", value: "DENY" },
+      { key: "Referrer-Policy", value: "no-referrer" },
+      { key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=()" },
+      ...(process.env.NODE_ENV === "production" ? [{ key: "Strict-Transport-Security", value: "max-age=31536000" }] : []),
+    ] }];
+  },
   images: {
+    localPatterns: [
+      { pathname: "/landing/**", search: "" },
+      { pathname: "/og-image.png", search: "" },
+      { pathname: "/_next/static/media/**", search: "" },
+    ],
+    maximumDiskCacheSize: 128 * 1024 * 1024,
+    maximumResponseBody: 10 * 1024 * 1024,
+    maximumRedirects: 0,
     remotePatterns: [
       {
         protocol: "https",
         hostname: "images.unsplash.com",
-        pathname: "/**",
+        port: "",
+        pathname: "/photo-1503454537195-1dcabb73ffb9",
+        search: "?auto=format&fit=crop&w=2400&q=86",
       },
     ],
   },