Ship LNURL mint pages, indexing UI, and reviews rewrite.

Add lnurl list/detail routes, OG fixtures, i18n strings, and the write/
index client flows so the site surfaces the new mint type end to end.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/pages/[...locale]/fedimints.astro

@@ -14,6 +14,7 @@
  */
 import Base from '../../layouts/Base.astro';
 import MintCard from '../../components/MintCard.astro';
+import ReviewByUrl from '../../components/ReviewByUrl.astro';
 import { fetchFedimints } from '../../lib/api';
 import { localePath, useI18n, type Locale } from '../../i18n';
 import { itemListNode } from '../../lib/schema';
@@ -66,8 +67,18 @@ const schema = [
 <Base title={t('fedimints.title')} description={description} current="fedimints" schema={schema}>
   <div class="page">
     <div class="index-head">
-      <h1>{t('fedimints.heading')}</h1>
-      <p class="lede">{t('fedimints.lede')}</p>
+      <div class="index-head-text">
+        <h1>{t('fedimints.heading')}</h1>
+        <p class="lede">{t('fedimints.lede')}</p>
+      </div>
+      {/*
+        The way in for something this site has never seen. Every other route to writing
+        a review starts from a page that already exists, which is exactly the case a
+        reader with a brand new mint does not have.
+      */}
+      <button class="btn primary index-head-action" type="button" data-review-url-open="fedimint">
+        {t('reviews.byUrl.open')}
+      </button>
     </div>
 
     <div class="controls" data-mint-controls>
@@ -142,10 +153,17 @@ const schema = [
       )
     }
   </div>
+
+  {/* Two steps in one dialog: identify the mint, then the ordinary review form. */}
+  <ReviewByUrl type="fedimint" />
 </Base>
 
 <style>
-  .index-head { margin-bottom: 24px; }
+  /* Heading and lede on the left, the one primary action on the right, wrapping to
+     its own line before the lede has to give up any width. */
+  .index-head { margin-bottom: 24px; display: flex; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
+  .index-head-text { flex: 1 1 320px; }
+  .index-head-action { flex-shrink: 0; }
   .index-head h1 { font-family: var(--display); font-size: 32px; font-weight: 700; letter-spacing: -.02em; line-height: 1.1; }
   .index-head .lede { max-width: 620px; font-size: 15.5px; margin-top: 10px; }