seo improvement and updated notifs

src/lib/firebase.ts

@@ -1,5 +1,6 @@
 import { initializeApp } from 'firebase/app'
 import { getAuth, GoogleAuthProvider } from 'firebase/auth'
+import { getMessaging, isSupported } from 'firebase/messaging'
 
 const firebaseConfig = {
   apiKey: import.meta.env.VITE_FIREBASE_API_KEY,
@@ -15,3 +16,6 @@ const app = initializeApp(firebaseConfig)
 // Google Auth initialization
 export const auth = getAuth(app)
 export const googleProvider = new GoogleAuthProvider()
+
+// FCM Messaging — resolves to null in unsupported browsers (e.g. Firefox, older Safari)
+export const messagingPromise = isSupported().then((yes) => (yes ? getMessaging(app) : null))