feat: complete client billing UI and staff benefits display (#524, #527)

- Client App: Built dedicated ShiftCompletionReviewPage  and InvoiceReadyPage
- Client App: Wired up invoice summary mapping and parsing logic from Data Connect
- Staff App: Added dynamic BenefitsOverviewPage tracking worker limits matching client mockup
- Staff App: Display progress ring values wired to real VendorBenefitPlan & BenefitsData balances

apps/mobile/packages/domain/lib/src/entities/benefits/benefit.dart

@@ -0,0 +1,26 @@
+import 'package:equatable/equatable.dart';
+
+/// Represents a staff member's benefit balance.
+class Benefit extends Equatable {
+  /// The title of the benefit (e.g., Sick Leave, Holiday, Vacation).
+  final String title;
+
+  /// The total entitlement in hours.
+  final double entitlementHours;
+
+  /// The hours used so far.
+  final double usedHours;
+
+  /// The hours remaining.
+  double get remainingHours => entitlementHours - usedHours;
+
+  /// Creates a [Benefit].
+  const Benefit({
+    required this.title,
+    required this.entitlementHours,
+    required this.usedHours,
+  });
+
+  @override
+  List<Object?> get props => [title, entitlementHours, usedHours];
+}

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

@@ -37,6 +37,12 @@ class Invoice extends Equatable {
     required this.addonsAmount,
     this.invoiceNumber,
     this.issueDate,
+    this.title,
+    this.clientName,
+    this.locationAddress,
+    this.staffCount,
+    this.totalHours,
+    this.workers = const [],
   });
   /// Unique identifier.
   final String id;
@@ -65,6 +71,24 @@ class Invoice extends Equatable {
   /// Date when the invoice was issued.
   final DateTime? issueDate;
 
+  /// Human-readable title (e.g. event name).
+  final String? title;
+
+  /// Name of the client business.
+  final String? clientName;
+
+  /// Address of the event/location.
+  final String? locationAddress;
+
+  /// Number of staff worked.
+  final int? staffCount;
+
+  /// Total hours worked.
+  final double? totalHours;
+
+  /// List of workers associated with this invoice.
+  final List<InvoiceWorker> workers;
+
   @override
   List<Object?> get props => <Object?>[
         id,
@@ -76,5 +100,49 @@ class Invoice extends Equatable {
         addonsAmount,
         invoiceNumber,
         issueDate,
+        title,
+        clientName,
+        locationAddress,
+        staffCount,
+        totalHours,
+        workers,
+      ];
+}
+
+/// Represents a worker entry in an [Invoice].
+class InvoiceWorker extends Equatable {
+  const InvoiceWorker({
+    required this.name,
+    required this.role,
+    required this.amount,
+    required this.hours,
+    required this.rate,
+    this.checkIn,
+    this.checkOut,
+    this.breakMinutes = 0,
+    this.avatarUrl,
+  });
+
+  final String name;
+  final String role;
+  final double amount;
+  final double hours;
+  final double rate;
+  final DateTime? checkIn;
+  final DateTime? checkOut;
+  final int breakMinutes;
+  final String? avatarUrl;
+
+  @override
+  List<Object?> get props => [
+        name,
+        role,
+        amount,
+        hours,
+        rate,
+        checkIn,
+        checkOut,
+        breakMinutes,
+        avatarUrl,
       ];
 }