chore: add custom placeholder and fine tune calepin-toml

site/medias/index.typ

@@ -1,7 +1,43 @@
 #set document(title: [Medias])
-#metadata((title: "Overview", translation_key: "medias-index")) <website-metadata>
+#metadata((
+  title: "Overview",
+  translation_key: "medias-overview",
+  date: "2026-10-10",
+  tags: ("medias", "films", "series", "books"),
+  author: "Rémi Heredero",
+  summary: "My very opinionned ideas about somes films, series and books",
+  draft: false,
+  pdf: false
+))<website-metadata>
 
 #title()
 
-Placeholder page for the medias category: films, series, books.
+Placeholder page for the medias category.
 The real content comes later.
+
+#import "@preview/calepin:0.1.0" as calepin
+#show: calepin.document
+
+== Films
+#let posts = calepin.pages().filter(p => p.path.starts-with("medias/films/")).filter(p => not p.meta.at("draft", default: false)).sorted(key: p => p.meta.at("date", default: "")).rev()
+
+#for post in posts [
+  - #link(post.href)[#post.title] \
+    #post.meta.at("summary", default: [])
+]
+
+== Series
+#let posts = calepin.pages().filter(p => p.path.starts-with("medias/series/")).filter(p => not p.meta.at("draft", default: false)).sorted(key: p => p.meta.at("date", default: "")).rev()
+
+#for post in posts [
+  - #link(post.href)[#post.title] \
+    #post.meta.at("summary", default: [])
+]
+
+== Books
+#let posts = calepin.pages().filter(p => p.path.starts-with("medias/books/")).filter(p => not p.meta.at("draft", default: false)).sorted(key: p => p.meta.at("date", default: "")).rev()
+
+#for post in posts [
+  - #link(post.href)[#post.title] \
+    #post.meta.at("summary", default: [])
+]