feat(client_coverage): add client coverage feature with user session data use case and dashboard widgets

- Created `client_coverage` feature with necessary dependencies in `pubspec.yaml`.
- Implemented `GetUserSessionDataUseCase` for retrieving user session data.
- Developed `ClientHomeEditBanner` for edit mode instructions and reset functionality.
- Added `ClientHomeHeader` to display user information and action buttons.
- Built `DashboardWidgetBuilder` to render various dashboard widgets based on state.
- Introduced `DraggableWidgetWrapper` for managing widget visibility and drag handles in edit mode.
- Created `HeaderIconButton` for interactive header actions with optional badge support.

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

@@ -1,4 +1,5 @@
 import 'package:krow_domain/krow_domain.dart';
+import '../session/client_session_store.dart';
 
 /// Mock implementation of data source for Home dashboard data.
 ///
@@ -18,4 +19,14 @@ class HomeRepositoryMock {
       totalFilled: 8,
     );
   }
+
+  /// Returns the current user's session data.
+  ///
+  /// Returns a tuple of (businessName, photoUrl).
+  (String, String?) getUserSession() {
+    final session = ClientSessionStore.instance.session;
+    final businessName = session?.business?.businessName ?? 'Your Company';
+    final photoUrl = session?.userPhotoUrl;
+    return (businessName, photoUrl);
+  }
 }