lighthouse fixes

site/src/pages/podcast.astro

@@ -4,11 +4,36 @@ import ContentCard from "../components/ContentCard.astro";
 import MediaModal from "../components/MediaModal.astro";
 import { readContentCache } from "../lib/content/cache";
 import { podcastEpisodes } from "../lib/content/selectors";
+import { getPublicConfig } from "../lib/config";
 
 const cache = await readContentCache();
 const episodes = podcastEpisodes(cache).sort(
   (a, b) => Date.parse(b.publishedAt) - Date.parse(a.publishedAt),
 );
+
+const cfg = getPublicConfig();
+const siteUrl = (cfg.siteUrl || "http://localhost:4321").replace(/\/$/, "");
+const canonicalUrl = `${siteUrl}/podcast`;
+
+const podcastJsonLd = {
+  "@context": "https://schema.org",
+  "@type": "CollectionPage",
+  name: "Podcast | Irregular Mind",
+  url: canonicalUrl,
+  mainEntity: {
+    "@type": "ItemList",
+    itemListElement: episodes.slice(0, 20).map((episode, index) => ({
+      "@type": "ListItem",
+      position: index + 1,
+      url: `${siteUrl}/podcast/${encodeURIComponent(episode.id)}`,
+      item: {
+        "@type": "PodcastEpisode",
+        name: episode.title,
+        datePublished: episode.publishedAt,
+      },
+    })),
+  },
+};
 ---
 
 <BaseLayout
@@ -16,6 +41,7 @@ const episodes = podcastEpisodes(cache).sort(
   description="Episodes from the Irregular Mind podcast."
   canonicalPath="/podcast"
 >
+  <script type="application/ld+json" set:html={JSON.stringify(podcastJsonLd)} />
   <section class="section">
     <div class="section-header">
       <h2>Irregular Mind</h2>