fix: ensure rewrites are merged when config is a function (withPayload)

apps/web/next.config.mjs

@@ -51,56 +51,52 @@ const nextConfig = {
 
 const withMDX = createMDX({});
 
-// Apply wrappers
-const wrappedConfig = withPayload(withMintelConfig(withMDX(nextConfig)));
+// Execute wrappers
+let config = withPayload(withMintelConfig(withMDX(nextConfig)));
 
-// HARDEN REWRITES: Manually merge showcase rules to prevent wrapper overwrites
-const originalRewrites = wrappedConfig.rewrites;
-wrappedConfig.rewrites = async () => {
-  const existing = await originalRewrites?.() || [];
+/**
+ * Injects our critical showcase rewrites into a resolved Next.js config object.
+ */
+function injectShowcaseRewrites(resolvedConfig) {
+  const originalRewrites = resolvedConfig.rewrites;
   
-  // Normalize existing to object pattern (Next.js supports both Array and Object)
-  const normalized = Array.isArray(existing) 
-    ? { afterFiles: existing, beforeFiles: [], fallback: [] } 
-    : existing;
+  resolvedConfig.rewrites = async () => {
+    const existing = await originalRewrites?.() || [];
+    
+    // Normalize existing to object pattern
+    const normalized = Array.isArray(existing) 
+      ? { afterFiles: existing, beforeFiles: [], fallback: [] } 
+      : existing;
 
-  return {
-    ...normalized,
-    beforeFiles: [
-      ...(normalized.beforeFiles || []),
-      // Diagnostic rule
-      {
-        source: '/robots-test',
-        destination: '/robots.txt',
-      },
-      // Assets requested from root
-      {
-        source: '/assets/:path*',
-        destination: '/showcase/klz-cables.com/assets/:path*',
-      },
-      {
-        source: '/wp-content/:path*',
-        destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-content/:path*',
-      },
-      {
-        source: '/wp-includes/:path*',
-        destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-includes/:path*',
-      },
-      // Assets requested relatively from case-studies/work/blog subpages
-      {
-        source: '/:folder(case-studies|work|blog)/assets/:path*',
-        destination: '/showcase/klz-cables.com/assets/:path*',
-      },
-      {
-        source: '/:folder(case-studies|work|blog)/wp-content/:path*',
-        destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-content/:path*',
-      },
-      {
-        source: '/:folder(case-studies|work|blog)/wp-includes/:path*',
-        destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-includes/:path*',
-      },
-    ],
+    return {
+      ...normalized,
+      beforeFiles: [
+        ...(normalized.beforeFiles || []),
+        // Diagnostic rule
+        { source: '/robots-test', destination: '/robots.txt' },
+        // Showcase Assets
+        { source: '/assets/:path*', destination: '/showcase/klz-cables.com/assets/:path*' },
+        { source: '/wp-content/:path*', destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-content/:path*' },
+        { source: '/wp-includes/:path*', destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-includes/:path*' },
+        { source: '/:folder(case-studies|work|blog)/assets/:path*', destination: '/showcase/klz-cables.com/assets/:path*' },
+        { source: '/:folder(case-studies|work|blog)/wp-content/:path*', destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-content/:path*' },
+        { source: '/:folder(case-studies|work|blog)/wp-includes/:path*', destination: '/showcase/klz-cables.com/assets/klz-cables.com/wp-includes/:path*' },
+      ],
+    };
   };
-};
+  
+  return resolvedConfig;
+}
 
-export default wrappedConfig;
+// Handle both standard objects and functional wrappers (like withPayload)
+if (typeof config === 'function') {
+  const originalConfigWrapper = config;
+  config = async (phase, args) => {
+    const resolved = await originalConfigWrapper(phase, args);
+    return injectShowcaseRewrites(resolved);
+  };
+} else {
+  config = injectShowcaseRewrites(config);
+}
+
+export default config;