Load analytics tags from config during Vite build

webui/vite.config.js

@@ -1,9 +1,23 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import fs from 'node:fs'
+
+const ANALYTICS_PLACEHOLDER = '<!-- analytics:inject -->'
+
+function analyticsTags() {
+  return {
+    name: 'analytics-tags',
+    transformIndexHtml(html) {
+      const tagsPath = new URL('./src/config/analytics.html', import.meta.url)
+      const tags = fs.existsSync(tagsPath) ? fs.readFileSync(tagsPath, 'utf8').trim() : ''
+      return html.replace(ANALYTICS_PLACEHOLDER, tags)
+    },
+  }
+}
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), analyticsTags()],
   build: {
     outDir: '../server/public',
     emptyOutDir: true,