feat: Centralized Error Handling & Crash Fixes

apps/mobile/packages/features/client/create_order/lib/src/presentation/blocs/one_time_order_bloc.dart

@@ -10,7 +10,7 @@ import 'one_time_order_state.dart';
 
 /// BLoC for managing the multi-step one-time order creation form.
 class OneTimeOrderBloc extends Bloc<OneTimeOrderEvent, OneTimeOrderState>
-    with BlocErrorHandler<OneTimeOrderState> {
+    with BlocErrorHandler<OneTimeOrderState>, SafeBloc<OneTimeOrderEvent, OneTimeOrderState> {
   OneTimeOrderBloc(this._createOneTimeOrderUseCase, this._dataConnect)
     : super(OneTimeOrderState.initial()) {
     on<OneTimeOrderVendorsLoaded>(_onVendorsLoaded);

apps/mobile/packages/features/client/create_order/lib/src/presentation/blocs/one_time_order_state.dart

@@ -71,6 +71,20 @@ class OneTimeOrderState extends Equatable {
     );
   }
 
+  bool get isValid {
+    return eventName.isNotEmpty &&
+        selectedVendor != null &&
+        selectedHub != null &&
+        positions.isNotEmpty &&
+        positions.every(
+          (OneTimeOrderPosition p) =>
+              p.role.isNotEmpty &&
+              p.count > 0 &&
+              p.startTime.isNotEmpty &&
+              p.endTime.isNotEmpty,
+        );
+  }
+
   @override
   List<Object?> get props => <Object?>[
     date,

apps/mobile/packages/features/client/create_order/lib/src/presentation/widgets/one_time_order/one_time_order_view.dart

@@ -25,7 +25,18 @@ class OneTimeOrderView extends StatelessWidget {
     final TranslationsClientCreateOrderOneTimeEn labels =
         t.client_create_order.one_time;
 
-    return BlocBuilder<OneTimeOrderBloc, OneTimeOrderState>(
+    return BlocConsumer<OneTimeOrderBloc, OneTimeOrderState>(
+      listener: (BuildContext context, OneTimeOrderState state) {
+        if (state.status == OneTimeOrderStatus.failure &&
+            state.errorMessage != null) {
+          UiSnackbar.show(
+            context,
+            message: translateErrorKey(state.errorMessage!),
+            type: UiSnackbarType.error,
+            margin: const EdgeInsets.only(bottom: 140, left: 16, right: 16),
+          );
+        }
+      },
       builder: (BuildContext context, OneTimeOrderState state) {
         if (state.status == OneTimeOrderStatus.success) {
           return OneTimeOrderSuccessView(
@@ -104,9 +115,11 @@ class OneTimeOrderView extends StatelessWidget {
                     ? labels.creating
                     : labels.create_order,
                 isLoading: state.status == OneTimeOrderStatus.loading,
-                onPressed: () => BlocProvider.of<OneTimeOrderBloc>(
-                  context,
-                ).add(const OneTimeOrderSubmitted()),
+                onPressed: state.isValid
+                    ? () => BlocProvider.of<OneTimeOrderBloc>(
+                          context,
+                        ).add(const OneTimeOrderSubmitted())
+                    : null,
               ),
             ],
           ),
@@ -286,7 +299,7 @@ class _BottomActionButton extends StatelessWidget {
     this.isLoading = false,
   });
   final String label;
-  final VoidCallback onPressed;
+  final VoidCallback? onPressed;
   final bool isLoading;
 
   @override