feat: restructure into XFlow monorepo with Nuxt 4, Modular Onion Monolith, Android client, and Desktop CLI

apps/web/app/plugins/firebase.client.ts

@@ -0,0 +1,23 @@
+import { initializeApp, getApps } from 'firebase/app'
+
+export default defineNuxtPlugin(() => {
+  const config = useRuntimeConfig()
+
+  const firebaseConfig = {
+    apiKey: config.public.firebaseApiKey,
+    authDomain: config.public.firebaseAuthDomain,
+    projectId: config.public.firebaseProjectId,
+    appId: config.public.firebaseAppId,
+    messagingSenderId: config.public.firebaseMessagingSenderId
+  }
+
+  if (!firebaseConfig.apiKey) {
+    console.warn('[Firebase] API key not configured. Google Sign-In will not work.')
+    return
+  }
+
+  if (!getApps().length) {
+    initializeApp(firebaseConfig)
+    console.log('[Firebase] Initialized')
+  }
+})