Can upload expenses to server

moneymgr_mobile/lib/widgets/synchronize_button.dart

@@ -3,6 +3,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:logging/logging.dart';
 import 'package:moneymgr_mobile/services/api/api_client.dart';
 import 'package:moneymgr_mobile/services/api/files_api.dart';
+import 'package:moneymgr_mobile/services/api/inbox_api.dart';
 import 'package:moneymgr_mobile/services/storage/expenses.dart';
 import 'package:moneymgr_mobile/utils/extensions.dart';
 import 'package:moneymgr_mobile/utils/hooks.dart';
@@ -27,8 +28,20 @@ Future<void> _performSynchronization(Ref ref) async {
       bytes: bytes,
     );
 
-    // TODO continue
-    break;
+    // Then, create the inbox entry
+    await apiService.createInboxEntry(
+      UpdateInboxEntryRequest(
+        file_id: file.id,
+        time: exp.time,
+        label: exp.label,
+        amount: -1 * exp.cost,
+      ),
+    );
+
+    // Lastly delete the local expense
+    ref.watch(expensesProvider).requireValue.deleteExpense(exp);
+
+    ref.invalidate(expensesProvider);
   }
 }