P1 fondation : tokens layerés, reset, thèmes (base/renovation/aep/tmip), 9 primitives Astro, pont Tailwind 4, démo kitchen sink

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

components/Container.astro

@@ -0,0 +1,31 @@
+---
+/**
+ * Container — largeur max + gouttières cohérentes.
+ *
+ * Props :
+ *  - size  ('base' | 'narrow', 'base') : --container-max ou 45rem (lecture)
+ *  - class (string) : classes additionnelles
+ */
+interface Props {
+  size?: "base" | "narrow";
+  class?: string;
+}
+
+const { size = "base", class: className } = Astro.props;
+---
+
+<div class:list={["tf-container", { "tf-container--narrow": size === "narrow" }, className]}>
+  <slot />
+</div>
+
+<style>
+  .tf-container {
+    max-width: var(--container-max);
+    margin-inline: auto;
+    padding-inline: var(--container-pad);
+  }
+
+  .tf-container--narrow {
+    max-width: 45rem;
+  }
+</style>