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/core/lib/src/routing/client/navigator.dart

@@ -94,6 +94,21 @@ extension ClientNavigator on IModularNavigator {
     navigate(ClientPaths.billing);
   }
 
+  /// Navigates to the Completion Review page.
+  void toCompletionReview({Object? arguments}) {
+    pushNamed(ClientPaths.completionReview, arguments: arguments);
+  }
+
+  /// Navigates to the full list of invoices awaiting approval.
+  void toAwaitingApproval({Object? arguments}) {
+    pushNamed(ClientPaths.awaitingApproval, arguments: arguments);
+  }
+
+  /// Navigates to the Invoice Ready page.
+  void toInvoiceReady() {
+    pushNamed(ClientPaths.invoiceReady);
+  }
+
   /// Navigates to the Orders tab.
   ///
   /// View and manage all shift orders with filtering and sorting.

apps/mobile/packages/core/lib/src/routing/client/route_paths.dart

@@ -81,6 +81,15 @@ class ClientPaths {
   /// Access billing history, payment methods, and invoices.
   static const String billing = '/client-main/billing';
 
+  /// Completion review page - review shift completion records.
+  static const String completionReview = '/client-main/billing/completion-review';
+
+  /// Full list of invoices awaiting approval.
+  static const String awaitingApproval = '/client-main/billing/awaiting-approval';
+
+  /// Invoice ready page - view status of approved invoices.
+  static const String invoiceReady = '/client-main/billing/invoice-ready';
+
   /// Orders tab - view and manage shift orders.
   ///
   /// List of all orders with filtering and status tracking.

apps/mobile/packages/core/lib/src/routing/staff/navigator.dart

@@ -79,6 +79,11 @@ extension StaffNavigator on IModularNavigator {
     pushNamedAndRemoveUntil(StaffPaths.home, (_) => false);
   }
 
+  /// Navigates to the benefits overview page.
+  void toBenefits() {
+    pushNamed(StaffPaths.benefits);
+  }
+
   /// Navigates to the staff main shell.
   ///
   /// This is the container with bottom navigation. Navigates to home tab

apps/mobile/packages/core/lib/src/routing/staff/route_paths.dart

@@ -72,6 +72,9 @@ class StaffPaths {
   /// Displays shift cards, quick actions, and notifications.
   static const String home = '/worker-main/home/';
 
+  /// Benefits overview page.
+  static const String benefits = '/worker-main/home/benefits';
+
   /// Shifts tab - view and manage shifts.
   ///
   /// Browse available shifts, accepted shifts, and shift history.