fix: make Firebase initialization synchronous to prevent race condition

FirebaseInitializer was launching Firebase.initialize() on Dispatchers.IO,
but UserManager accesses Firebase.messaging.token synchronously during Hilt
injection in Application.onCreate(). This race causes IllegalStateException
when the IO coroutine hasn't completed before injection runs.

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

apps/flipcash/app/src/main/kotlin/com/flipcash/app/internal/startup/FirebaseInitializer.kt

@@ -4,15 +4,10 @@ import android.content.Context
 import androidx.startup.Initializer
 import com.google.firebase.Firebase
 import com.google.firebase.initialize
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 
 class FirebaseInitializer: Initializer<Unit> {
     override fun create(context: Context) {
-        CoroutineScope(Dispatchers.IO).launch {
-            Firebase.initialize(context)
-        }
+        Firebase.initialize(context)
     }
 
     override fun dependencies(): List<Class<out Initializer<*>?>?> {