feat: Update NEXT_SPRINT_TASKS with new tasks and modify ViewOrdersCubit to handle null selectedDate

apps/mobile/NEXT_SPRINT_TASKS.md

@@ -16,3 +16,4 @@
 - Update the dataconnect docs.
 - Track `lat` and `lng` in the staff preferred work locations (for now we are only storing the name).
 - Remove "Up Next (x)" counter from orders list in client app as it is confusing, becase the tab already has a badge showing the number of the upcoming orders.
+- `  final String status;` in `OrderItem` make it an enum.

apps/mobile/packages/features/client/view_orders/lib/src/presentation/blocs/view_orders_cubit.dart

@@ -268,10 +268,16 @@ class ViewOrdersCubit extends Cubit<ViewOrdersState> {
   }
 
   int _calculateUpNextCount() {
+    if (state.selectedDate == null) return 0;
+
+    final String selectedDateStr = DateFormat(
+      'yyyy-MM-dd',
+    ).format(state.selectedDate!);
+
     return state.orders
         .where(
           (OrderItem s) =>
-              // TODO(orders): move PENDING to its own tab once available.
+              s.date == selectedDateStr &&
               <String>['OPEN', 'FILLED', 'CONFIRMED', 'PENDING', 'ASSIGNED']
                   .contains(s.status),
         )