refactor: centralize data connect error handling and resolve build issues across applications

This commit addresses several critical issues across the mobile monorepo:

1. Centralized Error Handling: Integrated DataErrorHandler mixin into all repository implementations, ensuring consistent mapping of Data Connect exceptions to domain AppExceptions.
2. Build Stabilization: Fixed numerous type mismatches, parameter signature errors in widgets (e.g., google_places_flutter itemBuilder), and naming conflicts (StaffSession, FirebaseAuth).
3. Code Quality: Applied 'dart fix' across all modified packages and manually cleared debug print statements and UI clutter.
4. Mono-repo alignment: Standardized Data Connect usage and aliasing ('dc.') for better maintainability.

Signed-off-by: Suriya <suriya@tenext.in>

apps/mobile/packages/features/client/billing/lib/src/billing_module.dart

@@ -16,13 +16,11 @@ import 'presentation/pages/billing_page.dart';
 class BillingModule extends Module {
   @override
   void binds(Injector i) {
-    // Mock repositories (TODO: Replace with real implementations)
-    i.addSingleton<FinancialRepositoryMock>(FinancialRepositoryMock.new);
+
 
     // Repositories
     i.addSingleton<BillingRepository>(
       () => BillingRepositoryImpl(
-        financialRepository: i.get<FinancialRepositoryMock>(),
         dataConnect: ExampleConnector.instance,
       ),
     );

apps/mobile/packages/features/client/billing/lib/src/data/repositories_impl/billing_repository_impl.dart

@@ -12,28 +12,34 @@ import '../../domain/repositories/billing_repository.dart';
 /// It strictly adheres to the Clean Architecture data layer responsibilities:
 /// - No business logic (except necessary data transformation/filtering).
 /// - Delegates to data sources.
-class BillingRepositoryImpl implements BillingRepository {
+class BillingRepositoryImpl
+    with data_connect.DataErrorHandler
+    implements BillingRepository {
   /// Creates a [BillingRepositoryImpl].
   ///
   /// Requires the [financialRepository] to fetch financial data.
   BillingRepositoryImpl({
-    required data_connect.FinancialRepositoryMock financialRepository,
     required data_connect.ExampleConnector dataConnect,
-  })  : _financialRepository = financialRepository,
-        _dataConnect = dataConnect;
+  }) : _dataConnect = dataConnect;
 
-  final data_connect.FinancialRepositoryMock _financialRepository;
   final data_connect.ExampleConnector _dataConnect;
 
   /// Fetches the current bill amount by aggregating open invoices.
   @override
+  @override
   Future<double> getCurrentBillAmount() async {
-    // In a real app, this might be an aggregate query.
-    // Simulating fetching invoices and summing up.
-    final List<Invoice> invoices = await _financialRepository.getInvoices(
-      'current_business',
-    );
-    return invoices
+    final String? businessId =
+        data_connect.ClientSessionStore.instance.session?.business?.id;
+    if (businessId == null || businessId.isEmpty) {
+      return 0.0;
+    }
+
+    final fdc.QueryResult<data_connect.ListInvoicesByBusinessIdData, data_connect.ListInvoicesByBusinessIdVariables> result = await executeProtected(() => _dataConnect
+        .listInvoicesByBusinessId(businessId: businessId)
+        .execute());
+
+    return result.data.invoices
+        .map(_mapInvoice)
         .where((Invoice i) => i.status == InvoiceStatus.open)
         .fold<double>(
           0.0,
@@ -50,25 +56,32 @@ class BillingRepositoryImpl implements BillingRepository {
       return <Invoice>[];
     }
 
-    final fdc.QueryResult<data_connect.ListInvoicesByBusinessIdData,
-        data_connect.ListInvoicesByBusinessIdVariables> result =
-        await _dataConnect
+    final fdc.QueryResult<data_connect.ListInvoicesByBusinessIdData, data_connect.ListInvoicesByBusinessIdVariables> result = await executeProtected(() => _dataConnect
             .listInvoicesByBusinessId(
               businessId: businessId,
             )
             .limit(10)
-            .execute();
+            .execute());
 
     return result.data.invoices.map(_mapInvoice).toList();
   }
 
   /// Fetches pending invoices (Open or Disputed).
   @override
+  @override
   Future<List<Invoice>> getPendingInvoices() async {
-    final List<Invoice> invoices = await _financialRepository.getInvoices(
-      'current_business',
-    );
-    return invoices
+    final String? businessId =
+        data_connect.ClientSessionStore.instance.session?.business?.id;
+    if (businessId == null || businessId.isEmpty) {
+      return <Invoice>[];
+    }
+
+    final fdc.QueryResult<data_connect.ListInvoicesByBusinessIdData, data_connect.ListInvoicesByBusinessIdVariables> result = await executeProtected(() => _dataConnect
+        .listInvoicesByBusinessId(businessId: businessId)
+        .execute());
+
+    return result.data.invoices
+        .map(_mapInvoice)
         .where(
           (Invoice i) =>
               i.status == InvoiceStatus.open ||
@@ -111,16 +124,13 @@ class BillingRepositoryImpl implements BillingRepository {
       end = DateTime(now.year, now.month + 1, 0, 23, 59, 59, 999);
     }
 
-    final fdc.QueryResult<
-        data_connect.ListShiftRolesByBusinessAndDatesSummaryData,
-        data_connect.ListShiftRolesByBusinessAndDatesSummaryVariables> result =
-        await _dataConnect
+    final fdc.QueryResult<data_connect.ListShiftRolesByBusinessAndDatesSummaryData, data_connect.ListShiftRolesByBusinessAndDatesSummaryVariables> result = await executeProtected(() => _dataConnect
             .listShiftRolesByBusinessAndDatesSummary(
               businessId: businessId,
               start: _toTimestamp(start),
               end: _toTimestamp(end),
             )
-            .execute();
+            .execute());
 
     final List<data_connect.ListShiftRolesByBusinessAndDatesSummaryShiftRoles>
         shiftRoles = result.data.shiftRoles;

apps/mobile/packages/features/client/billing/lib/src/presentation/blocs/billing_bloc.dart

@@ -1,6 +1,5 @@
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:krow_domain/krow_domain.dart';
-import '../../domain/models/billing_period.dart';
 import '../../domain/usecases/get_current_bill_amount.dart';
 import '../../domain/usecases/get_invoice_history.dart';
 import '../../domain/usecases/get_pending_invoices.dart';