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 },
   },