Add configurable Plausible analytics

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

web/astro.config.mjs

@@ -28,6 +28,12 @@ const apiUrl = process.env.API_URL ?? 'http://127.0.0.1:8787';
 // https://api.cashumints.space.
 const publicApiUrl = process.env.PUBLIC_API_URL ?? '';
 
+// Plausible-compatible analytics endpoint and site identifier. Empty values disable the
+// script, which is useful for local builds that should not report page views.
+const plausibleUrl =
+  process.env.PLAUSIBLE_URL ?? 'https://analytics.azzamo.net/js/script.js';
+const plausibleDomain = process.env.PLAUSIBLE_DOMAIN ?? 'cashumints.space';
+
 // Dev server and preview port. Set WEB_PORT in .env; a --port flag still overrides it.
 const port = Number.parseInt(process.env.WEB_PORT ?? '', 10) || 4321;
 
@@ -73,6 +79,8 @@ export default defineConfig({
   vite: {
     define: {
       'import.meta.env.PUBLIC_API_URL': JSON.stringify(publicApiUrl),
+      'import.meta.env.PLAUSIBLE_URL': JSON.stringify(plausibleUrl),
+      'import.meta.env.PLAUSIBLE_DOMAIN': JSON.stringify(plausibleDomain),
     },
     server: { proxy },
   },

web/src/layouts/Base.astro

@@ -130,6 +130,9 @@ const i18nPayload = JSON.stringify({ locale, catalog: clientCatalog(locale) }).r
  */
 const imageUrl = new URL(image, site).href;
 
+const plausibleUrl = import.meta.env.PLAUSIBLE_URL;
+const plausibleDomain = import.meta.env.PLAUSIBLE_DOMAIN;
+
 /**
  * This page's JSON-LD, assembled here and nowhere else.
  *
@@ -267,6 +270,9 @@ const noscriptMotion =
     {graph.length > 0 && (
       <script type="application/ld+json" is:inline set:html={serializeGraph(graph)} />
     )}
+    {plausibleUrl && plausibleDomain && (
+      <script is:inline defer data-domain={plausibleDomain} src={plausibleUrl}></script>
+    )}
   </head>
   <body>
     {/*