UI: Fix relative file href with hash

.changeset/petite-jobs-scream.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-ui': patch
+---
+
+Fix relative file href with hash

apps/docs/content/docs/ui/manual-installation.mdx

@@ -21,7 +21,9 @@ fumadocs-ui fumadocs-core
 
 ### 2. Content Source
 
-Fumadocs supports different content sources, there's how you configure Fumadocs MDX:
+Fumadocs supports different content sources, including Fumadocs MDX and [Content Collections](/docs/headless/content-collections).
+
+Fumadocs MDX is our official content source, you can configure it with:
 
 ```package-install
 fumadocs-mdx @types/mdx

packages/ui/src/mdx.server.tsx

@@ -18,7 +18,12 @@ export function createRelativeLink(
     // resolve relative href
     if (href && href.startsWith('.')) {
       const target = source.getPageByHref(href, { dir: page.file.dirname });
-      if (target) href = target.page.url;
+
+      if (target) {
+        href = target.hash
+          ? `${target.page.url}#${target.hash}`
+          : target.page.url;
+      }
     }
 
     return <OverrideLink href={href} {...props} />;