fix(blog): restore table of contents, fix list item styling, resolve dynamic og image generation

app/[locale]/blog/[slug]/opengraph-image.tsx

@@ -8,6 +8,20 @@ export const size = OG_IMAGE_SIZE;
 export const contentType = 'image/png';
 export const runtime = 'nodejs';
 
+async function fetchImageAsBase64(url: string) {
+  try {
+    const res = await fetch(url);
+    if (!res.ok) return undefined;
+    const arrayBuffer = await res.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+    const contentType = res.headers.get('content-type') || 'image/jpeg';
+    return `data:${contentType};base64,${buffer.toString('base64')}`;
+  } catch (error) {
+    console.error('Failed to fetch OG image:', url, error);
+    return undefined;
+  }
+}
+
 export default async function Image({
   params,
 }: {
@@ -32,12 +46,19 @@ export default async function Image({
       : `${SITE_URL}${post.frontmatter.featuredImage}`
     : undefined;
 
+  // Fetch image explicitly and convert to base64 because Satori sometimes struggles
+  // fetching remote URLs directly inside ImageResponse correctly in various environments.
+  let base64Image: string | undefined = undefined;
+  if (featuredImage) {
+    base64Image = await fetchImageAsBase64(featuredImage);
+  }
+
   return new ImageResponse(
     <OGImageTemplate
       title={post.frontmatter.title}
       description={post.frontmatter.excerpt}
       label={post.frontmatter.category || 'Blog'}
-      image={featuredImage}
+      image={base64Image || featuredImage}
     />,
     {
       ...OG_IMAGE_SIZE,