feat: add ShiftAssignmentCard widget and StaffShifts module

- Implemented ShiftAssignmentCard widget for displaying shift assignments with client details, pay calculation, and confirmation actions.
- Created StaffShiftsModule to manage dependencies, routes, and use cases related to staff shifts.
- Added necessary dependencies in pubspec.yaml and generated pubspec.lock.

apps/mobile/packages/data_connect/lib/krow_data_connect.dart

@@ -8,6 +8,7 @@
 library;
 
 export 'src/mocks/auth_repository_mock.dart';
+export 'src/mocks/shifts_repository_mock.dart';
 export 'src/mocks/staff_repository_mock.dart';
 export 'src/mocks/profile_repository_mock.dart';
 export 'src/mocks/event_repository_mock.dart';

apps/mobile/packages/data_connect/lib/src/mocks/event_repository_mock.dart

@@ -3,7 +3,7 @@ import 'package:krow_domain/krow_domain.dart';
 // TODO: Implement EventRepositoryInterface once defined in a feature package.
 class EventRepositoryMock {
   Future<Assignment> applyForPosition(String positionId, String staffId) async {
-    await Future.delayed(const Duration(milliseconds: 600));
+    await Future<void>.delayed(const Duration(milliseconds: 600));
     return Assignment(
       id: 'assign_1',
       positionId: positionId,
@@ -13,12 +13,12 @@ class EventRepositoryMock {
   }
 
   Future<Event?> getEvent(String id) async {
-    await Future.delayed(const Duration(milliseconds: 300));
+    await Future<void>.delayed(const Duration(milliseconds: 300));
     return _mockEvent;
   }
 
   Future<List<EventShift>> getEventShifts(String eventId) async {
-    await Future.delayed(const Duration(milliseconds: 300));
+    await Future<void>.delayed(const Duration(milliseconds: 300));
     return <EventShift>[
       const EventShift(
         id: 'shift_1',
@@ -30,7 +30,7 @@ class EventRepositoryMock {
   }
 
   Future<List<Assignment>> getStaffAssignments(String staffId) async {
-    await Future.delayed(const Duration(milliseconds: 500));
+    await Future<void>.delayed(const Duration(milliseconds: 500));
     return <Assignment>[
       const Assignment(
         id: 'assign_1',
@@ -42,7 +42,7 @@ class EventRepositoryMock {
   }
 
   Future<List<Event>> getUpcomingEvents() async {
-    await Future.delayed(const Duration(milliseconds: 800));
+    await Future<void>.delayed(const Duration(milliseconds: 800));
     return <Event>[_mockEvent];
   }
 

apps/mobile/packages/data_connect/lib/src/mocks/shifts_repository_mock.dart

@@ -0,0 +1,89 @@
+import 'package:krow_domain/krow_domain.dart';
+import 'package:intl/intl.dart';
+
+// Mock Implementation for now.
+class ShiftsRepositoryMock {
+  
+  Future<List<Shift>> getMyShifts() async {
+    await Future.delayed(const Duration(milliseconds: 500));
+    return [
+      Shift(
+        id: 'm1',
+        title: 'Warehouse Assistant',
+        clientName: 'Amazon',
+        logoUrl: 'https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Amazon_2024.svg/500px-Amazon_2024.svg.png',
+        hourlyRate: 22.5,
+        date: DateFormat('yyyy-MM-dd').format(DateTime.now().add(const Duration(days: 1))),
+        startTime: '09:00',
+        endTime: '17:00',
+        location: 'Logistics Park',
+        locationAddress: '456 Industrial Way',
+        status: 'confirmed',
+        createdDate: DateTime.now().toIso8601String(),
+        description: 'Standard warehouse duties. Safety boots required.',
+      ),
+    ];
+  }
+
+  Future<List<Shift>> getAvailableShifts() async {
+    await Future.delayed(const Duration(milliseconds: 500));
+    return [
+      Shift(
+        id: 'a1',
+        title: 'Bartender',
+        clientName: 'Club Luxe',
+        logoUrl: null,
+        hourlyRate: 30.0,
+        date: DateFormat('yyyy-MM-dd').format(DateTime.now().add(const Duration(days: 3))),
+        startTime: '20:00',
+        endTime: '02:00',
+        location: 'City Center',
+        locationAddress: '789 Nightlife Blvd',
+        status: 'open',
+        createdDate: DateTime.now().toIso8601String(),
+        description: 'Experience mixing cocktails required.',
+      ),
+      // Add more mocks if needed
+    ];
+  }
+
+  Future<List<Shift>> getPendingAssignments() async {
+    await Future.delayed(const Duration(milliseconds: 500));
+    return [
+      Shift(
+        id: 'p1',
+        title: 'Event Server',
+        clientName: 'Grand Hotel',
+        logoUrl: null,
+        hourlyRate: 25.0,
+        date: DateFormat('yyyy-MM-dd').format(DateTime.now().add(const Duration(days: 2))),
+        startTime: '16:00',
+        endTime: '22:00',
+        location: 'Downtown',
+        locationAddress: '123 Main St',
+        status: 'pending',
+        createdDate: DateTime.now().toIso8601String(),
+      ),
+    ];
+  }
+
+  Future<Shift?> getShiftDetails(String shiftId) async {
+    await Future.delayed(const Duration(milliseconds: 500));
+    return Shift(
+      id: shiftId,
+      title: 'Event Server',
+      clientName: 'Grand Hotel',
+      logoUrl: null,
+      hourlyRate: 25.0,
+      date: DateFormat('yyyy-MM-dd').format(DateTime.now()),
+      startTime: '16:00',
+      endTime: '22:00',
+      location: 'Downtown',
+      locationAddress: '123 Main St, New York, NY',
+      status: 'open',
+      createdDate: DateTime.now().toIso8601String(),
+      description: 'Provide exceptional customer service. Respond to guest requests or concerns promptly and professionally.',
+      managers: [],
+    );
+  }
+}