Add order entities and mocks for client order feature

Introduces new domain entities for order types and one-time orders, along with their positions. Adds a mock OrderRepository to the data_connect package and wires it into the module. Updates localization files for new order flows and refactors Equatable usage for consistency. Also adds a minus icon to the design system.

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

@@ -26,6 +26,16 @@ enum InvoiceStatus {
 
 /// Represents a bill sent to a [Business] for services rendered.
 class Invoice extends Equatable {
+
+  const Invoice({
+    required this.id,
+    required this.eventId,
+    required this.businessId,
+    required this.status,
+    required this.totalAmount,
+    required this.workAmount,
+    required this.addonsAmount,
+  });
   /// Unique identifier.
   final String id;
 
@@ -47,18 +57,8 @@ class Invoice extends Equatable {
   /// Total amount for addons/extras.
   final double addonsAmount;
 
-  const Invoice({
-    required this.id,
-    required this.eventId,
-    required this.businessId,
-    required this.status,
-    required this.totalAmount,
-    required this.workAmount,
-    required this.addonsAmount,
-  });
-
   @override
-  List<Object?> get props => [
+  List<Object?> get props => <Object?>[
         id,
         eventId,
         businessId,

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

@@ -2,6 +2,13 @@ import 'package:equatable/equatable.dart';
 
 /// Represents a reason or log for a declined [Invoice].
 class InvoiceDecline extends Equatable {
+
+  const InvoiceDecline({
+    required this.id,
+    required this.invoiceId,
+    required this.reason,
+    required this.declinedAt,
+  });
   /// Unique identifier.
   final String id;
 
@@ -14,13 +21,6 @@ class InvoiceDecline extends Equatable {
   /// When the decline happened.
   final DateTime declinedAt;
 
-  const InvoiceDecline({
-    required this.id,
-    required this.invoiceId,
-    required this.reason,
-    required this.declinedAt,
-  });
-
   @override
-  List<Object?> get props => [id, invoiceId, reason, declinedAt];
+  List<Object?> get props => <Object?>[id, invoiceId, reason, declinedAt];
 }

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

@@ -4,6 +4,15 @@ import 'package:equatable/equatable.dart';
 ///
 /// Corresponds to the work done by one [Staff] member.
 class InvoiceItem extends Equatable {
+
+  const InvoiceItem({
+    required this.id,
+    required this.invoiceId,
+    required this.staffId,
+    required this.workHours,
+    required this.rate,
+    required this.amount,
+  });
   /// Unique identifier.
   final String id;
 
@@ -22,15 +31,6 @@ class InvoiceItem extends Equatable {
   /// Total line item amount (workHours * rate).
   final double amount;
 
-  const InvoiceItem({
-    required this.id,
-    required this.invoiceId,
-    required this.staffId,
-    required this.workHours,
-    required this.rate,
-    required this.amount,
-  });
-
   @override
-  List<Object?> get props => [id, invoiceId, staffId, workHours, rate, amount];
+  List<Object?> get props => <Object?>[id, invoiceId, staffId, workHours, rate, amount];
 }

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

@@ -17,6 +17,15 @@ enum PaymentStatus {
 
 /// Represents a payout to a [Staff] member for a completed [Assignment].
 class StaffPayment extends Equatable {
+
+  const StaffPayment({
+    required this.id,
+    required this.staffId,
+    required this.assignmentId,
+    required this.amount,
+    required this.status,
+    this.paidAt,
+  });
   /// Unique identifier.
   final String id;
 
@@ -35,15 +44,6 @@ class StaffPayment extends Equatable {
   /// When the payment was successfully processed.
   final DateTime? paidAt;
 
-  const StaffPayment({
-    required this.id,
-    required this.staffId,
-    required this.assignmentId,
-    required this.amount,
-    required this.status,
-    this.paidAt,
-  });
-
   @override
-  List<Object?> get props => [id, staffId, assignmentId, amount, status, paidAt];
+  List<Object?> get props => <Object?>[id, staffId, assignmentId, amount, status, paidAt];
 }