Disable link prefetching site-wide (#5)

Next's client router prefetches every visible link. In output: "export"
mode that means a HEAD request to the page followed by a GET for its
__next._tree.txt segment payload. Those payloads are not deployed (the
.html route scheme forces scripts/fix-html-ext.mjs to move them aside),
so every prefetch was two wasted requests, the second a 404.

Every Fumadocs link renders through the framework Link from RootProvider,
so supply one that forces prefetch={false}. Navigation still works: a
click falls back to the full-page .txt payload as before.


Claude-Session: https://claude.ai/code/session_01Rb8SXvBwzUXaUEQtYHrD9V

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

Author: kyleconroy

components/provider.tsx

@@ -1,8 +1,22 @@
 'use client';
 import SearchDialog from '@/components/search';
 import { RootProvider } from 'fumadocs-ui/provider/next';
-import { type ReactNode } from 'react';
+import NextLink from 'next/link';
+import { type ComponentProps, type ReactNode } from 'react';
+
+// Every Fumadocs link (sidebar, page body, breadcrumb, prev/next footer)
+// renders through the framework Link supplied here. Prefetching is disabled
+// site-wide: this is a static export whose .html routes can't ship Next's
+// per-segment payloads (see scripts/fix-html-ext.mjs), so each prefetch would
+// only cost a HEAD to the page plus a 404 for its __next._tree.txt.
+function Link({ href = '#', ...props }: ComponentProps<'a'> & { prefetch?: boolean }) {
+  return <NextLink {...props} href={href} prefetch={false} />;
+}
 
 export function Provider({ children }: { children: ReactNode }) {
-  return <RootProvider search={{ SearchDialog }}>{children}</RootProvider>;
+  return (
+    <RootProvider search={{ SearchDialog }} components={{ Link }}>
+      {children}
+    </RootProvider>
+  );
 }