spare part validation added when create.

lib/controllers/api_routes/api_manager.dart

@@ -19,7 +19,7 @@ class ApiManager {
 
   Map<String, String> get _headers => {
         'Content-Type': 'application/json',
-        'X-Timezone-Offset': DateTime.now().timeZoneOffset.toString().split(".").first,
+        // 'X-Timezone-Offset': DateTime.now().timeZoneOffset.toString().split(".").first, todo @later, enable in next Release
         if (user != null) 'Authorization': 'Bearer ${user!.token}',
         if (assetGroup != null) 'AssetGroup': assetGroup!.id.toString(),
       };

lib/modules/cm_module/views/forms/spare_part/spare_part_request.dart

@@ -8,6 +8,7 @@ import 'package:test_sa/controllers/providers/api/parts_provider.dart';
 import 'package:test_sa/controllers/validator/validator.dart';
 import 'package:test_sa/extensions/context_extension.dart';
 import 'package:test_sa/extensions/int_extensions.dart';
+import 'package:test_sa/extensions/string_extensions.dart';
 import 'package:test_sa/extensions/text_extensions.dart';
 import 'package:test_sa/extensions/widget_extensions.dart';
 import 'package:test_sa/models/helper_data_models/spare_part/activity_spare_part_model.dart';
@@ -321,6 +322,14 @@ class _SparePartRequestState extends State<SparePartRequest> with TickerProvider
   }
 
   _onSubmit({required ServiceRequestDetailProvider requestDetailProvider}) async {
+    if (requestDetailProvider.sparePartHelperModel?.sparePart?.id == null) {
+      "Please select spare part".showToast;
+      return;
+    } else if (requestDetailProvider.sparePartHelperModel?.quantity == null) {
+      "Please enter quantity".showToast;
+      return;
+    }
+
     requestDetailProvider.sparePartHelperModel?.sparePartAttachments?.clear();
 
     for (var pickerObject in _files) {