Expand ecash explorer capabilities

Add Fedimint discovery, dual SQLite/Postgres storage, richer review handling, and generated social imagery.

web/src/components/Topbar.astro

@@ -5,7 +5,7 @@ import { localePath, useI18n } from '../i18n';
 import { pageLocale } from '../i18n/paths';
 
 interface Props {
-  current?: 'mints' | 'reviews' | 'wallets' | 'about';
+  current?: 'mints' | 'fedimints' | 'reviews' | 'wallets' | 'about';
   /** Shows the compact search affordance next to the brand (mint pages, /mints). */
   mintCount?: number;
 }
@@ -18,8 +18,18 @@ const t = useI18n(locale);
  * Route slugs stay English in every language, so the href is the English path run
  * through `localePath`. See src/i18n/routing.ts for why that trade was made.
  */
+/*
+ * "Cashu mints", not "Mints".
+ *
+ * Two ecosystems are listed now, so a bare "Mints" beside "Fedimints" reads as though
+ * federations were something other than mints — or as though the first link covered
+ * both. The extra word costs ~45px in the widest nav row and buys a label that is
+ * unambiguous at a glance. It is the same wording on /mints' own heading, in the
+ * breadcrumb and in the footer, so nothing calls the same page two things.
+ */
 const links = [
   { path: '/mints', label: t('nav.mints'), key: 'mints' },
+  { path: '/fedimints', label: t('nav.fedimints'), key: 'fedimints' },
   { path: '/reviews', label: t('nav.reviews'), key: 'reviews' },
   { path: '/wallets', label: t('nav.wallets'), key: 'wallets' },
   { path: '/about', label: t('nav.about'), key: 'about' },