Fix Firebase config to handle missing credentials gracefully

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

lib/firebase/config.ts

@@ -13,18 +13,29 @@ const firebaseConfig = {
   measurementId: process.env.NEXT_PUBLIC_FIREBASE_MEASUREMENT_ID,
 };
 
-// Only initialize if we have the API key (skip during build)
+// Only initialize if we have the API key (skip during build and if no config)
 let _app: FirebaseApp | undefined;
 let _auth: Auth | undefined;
 let _db: Firestore | undefined;
 let _storage: FirebaseStorage | undefined;
 
-if (typeof window !== 'undefined' || firebaseConfig.apiKey) {
+// Check if Firebase is properly configured
+const isFirebaseConfigured = firebaseConfig.apiKey && 
+                              firebaseConfig.authDomain && 
+                              firebaseConfig.projectId;
+
+if (isFirebaseConfigured && (typeof window !== 'undefined' || firebaseConfig.apiKey)) {
+  try {
     // Initialize Firebase (client-side only, safe for browser)
     _app = getApps().length === 0 ? initializeApp(firebaseConfig) : getApps()[0];
     _auth = getAuth(_app);
     _db = getFirestore(_app);
     _storage = getStorage(_app);
+  } catch (error) {
+    console.warn('Firebase initialization skipped - no credentials configured');
+  }
+} else {
+  console.warn('Firebase not configured - using PostgreSQL backend');
 }
 
 // Export with type assertions - these will be defined at runtime in the browser