site: end-of-review "Discuss it here" CTA linking the Stoop space

src/components/DiscussCta.astro

@@ -0,0 +1,39 @@
+---
+// End-of-article call to action pointing at the site's Stoop discussion space.
+// The space is site-wide (one thread space for unique.rzen.dev), so the link is
+// the same everywhere; the footer "Feedback" link points here too.
+const STOOP_URL = 'https://stoop.rzen.dev/unique';
+---
+
+<aside class="discuss" aria-label="Discussion">
+  <p>
+    Have a take on this one — a counterpoint, or a find of your own?{' '}
+    <a href={STOOP_URL} target="_blank" rel="noopener noreferrer">Discuss it here →</a>
+  </p>
+</aside>
+
+<style>
+  .discuss {
+    margin: 2.5rem 0 0;
+    padding: 1.05rem 1.25rem;
+    border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--rule));
+    border-radius: 8px;
+    background: color-mix(in srgb, var(--accent) 6%, transparent);
+    text-align: center;
+  }
+  .discuss p {
+    margin: 0;
+    font-size: 1rem;
+    line-height: 1.5;
+    color: var(--fg);
+  }
+  .discuss a {
+    font-weight: 600;
+    color: var(--accent);
+    text-decoration: none;
+    white-space: nowrap;
+  }
+  .discuss a:hover {
+    text-decoration: underline;
+  }
+</style>

src/pages/reviews/[...slug].astro

@@ -2,6 +2,7 @@
 import { getCollection, render } from 'astro:content';
 import BaseLayout from '../../layouts/BaseLayout.astro';
 import EditAction from '../../components/EditAction.astro';
+import DiscussCta from '../../components/DiscussCta.astro';
 import { sourceSlug } from '../../lib/sources';
 import {
   resolveExternalLink,
@@ -131,6 +132,8 @@ const categoryLabel =
       <p class="aff-disclosure">{AFFILIATE_DISCLOSURE}</p>
     )}
 
+    <DiscussCta />
+
     {import.meta.env.DEV && (
       <div class="edit-toolbar">
         <EditAction