feat: Combine logic of count calculations in ViewOrdersCubit and update date handling for order filtering

apps/mobile/NEXT_SPRINT_TASKS.md

@@ -19,3 +19,4 @@
 - `  final String status;` in `OrderItem` make it an enum.
 -   /// Date of the shift (ISO format).
   final String date; make this in the DateTime format instead of string.
+- in `view_orders_cubit.dart` combine the logic of `_calculateUpNextCount ` and `_calculateTodayCount` into a single function that calculates both counts together to avoid redundant filtering of orders.

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

@@ -252,13 +252,19 @@ class ViewOrdersCubit extends Cubit<ViewOrdersState> {
   }
 
   int _calculateCategoryCount(String category) {
+    if (state.selectedDate == null) return 0;
+
+    final String selectedDateStr = DateFormat(
+      'yyyy-MM-dd',
+    ).format(state.selectedDate!);
+
     if (category == 'active') {
       return state.orders
-          .where((OrderItem s) => s.status == 'IN_PROGRESS')
+          .where((OrderItem s) => s.date == selectedDateStr && s.status == 'IN_PROGRESS')
           .length;
     } else if (category == 'completed') {
       return state.orders
-          .where((OrderItem s) => s.status == 'COMPLETED')
+          .where((OrderItem s) => s.date == selectedDateStr && s.status == 'COMPLETED')
           .length;
     }
     return 0;