refactor: Enhance StaffPayment model and PaymentHistoryItem widget with shift details

apps/mobile/packages/domain/lib/src/entities/financial/staff_payment.dart

@@ -28,6 +28,12 @@ class StaffPayment extends Equatable {
     required this.amount,
     required this.status,
     this.paidAt,
+    this.shiftTitle,
+    this.shiftLocation,
+    this.locationAddress,
+    this.hoursWorked,
+    this.hourlyRate,
+    this.workedTime,
   });
   /// Unique identifier.
   final String id;
@@ -47,6 +53,24 @@ class StaffPayment extends Equatable {
   /// When the payment was successfully processed.
   final DateTime? paidAt;
 
+  /// Title of the shift worked.
+  final String? shiftTitle;
+
+  /// Location/hub name of the shift.
+  final String? shiftLocation;
+
+  /// Address of the shift location.
+  final String? locationAddress;
+
+  /// Number of hours worked.
+  final double? hoursWorked;
+
+  /// Hourly rate for the shift.
+  final double? hourlyRate;
+
+  /// Work session duration or status.
+  final String? workedTime;
+
   @override
-  List<Object?> get props => <Object?>[id, staffId, assignmentId, amount, status, paidAt];
+  List<Object?> get props => <Object?>[id, staffId, assignmentId, amount, status, paidAt, shiftTitle, shiftLocation, locationAddress, hoursWorked, hourlyRate, workedTime];
 }