chore(astro): upgrade to astro 6 with legacy content compatibility

src/pages/archicrat-ia/[...slug].astro

@@ -1,34 +1,38 @@
 ---
 import EditionLayout from "../../layouts/EditionLayout.astro";
-import { getCollection } from "astro:content";
 import EditionToc from "../../components/EditionToc.astro";
 import LocalToc from "../../components/LocalToc.astro";
+import { getCollection, render } from "astro:content";
 
 export async function getStaticPaths() {
-  // ✅ Après migration : plus de filtre par prefix, on prend toute la collection
   const entries = await getCollection("archicrat-ia");
 
   return entries.map((entry) => ({
-    params: { slug: entry.slug },
-    props: { entry },
+    params: { slug: String(entry.id).replace(/\.(md|mdx)$/i, "") },
+    props: { entry }
   }));
 }
 
 const { entry } = Astro.props;
-const { Content, headings } = await entry.render();
+const { Content, headings } = await render(entry);
 ---
 
 <EditionLayout
   title={entry.data.title}
   editionLabel="Essai-thèse"
   editionKey="archicrat-ia"
-  statusLabel="essai-thèse"
+  statusLabel="Essai-thèse"
   statusKey="essai_these"
-  level={entry.data.level}
+  level={entry.data.level ?? 1}
   version={entry.data.version}
 >
   <Fragment slot="aside">
-    <EditionToc currentSlug={entry.slug} />
+    <EditionToc
+      currentSlug={String(entry.id).replace(/\.(md|mdx)$/i, "")}
+      collection="archicrat-ia"
+      basePath="/archicrat-ia"
+      label="Table des matières — ArchiCraT-IA"
+    />
     <LocalToc headings={headings} />
   </Fragment>