refactor: change singleton registrations to lazySingleton for improved performance

apps/mobile/packages/features/staff/home/lib/src/staff_home_module.dart

@@ -33,7 +33,7 @@ class StaffHomeModule extends Module {
     );
 
     // Presentation layer - Cubits
-    i.addSingleton(
+    i.addLazySingleton(
       () => HomeCubit(
         repository: i.get<HomeRepository>(),
         getProfileCompletion: i.get<GetProfileCompletionUseCase>(),

apps/mobile/packages/features/staff/profile/lib/src/staff_profile_module.dart

@@ -68,7 +68,7 @@ class StaffProfileModule extends Module {
 
     // Presentation layer - Cubit as singleton to avoid recreation
     // BlocProvider will use this same instance, preventing state emission after close
-    i.addSingleton<ProfileCubit>(
+    i.addLazySingleton<ProfileCubit>(
       () => ProfileCubit(
         i.get<GetStaffProfileUseCase>(),
         i.get<SignOutStaffUseCase>(),

apps/mobile/packages/features/staff/profile_sections/support/faqs/lib/src/staff_faqs_module.dart

@@ -17,17 +17,17 @@ class FaqsModule extends Module {
   @override
   void binds(Injector i) {
     // Repository
-    i.addSingleton<FaqsRepositoryInterface>(
+    i.addLazySingleton<FaqsRepositoryInterface>(
       () => FaqsRepositoryImpl(),
     );
 
     // Use Cases
-    i.addSingleton(
+    i.addLazySingleton(
       () => GetFaqsUseCase(
         i<FaqsRepositoryInterface>(),
       ),
     );
-    i.addSingleton(
+    i.addLazySingleton(
       () => SearchFaqsUseCase(
         i<FaqsRepositoryInterface>(),
       ),

apps/mobile/packages/features/staff/profile_sections/support/privacy_security/lib/src/staff_privacy_security_module.dart

@@ -25,29 +25,29 @@ class PrivacySecurityModule extends Module {
   @override
   void binds(Injector i) {
     // Repository
-    i.addSingleton<PrivacySettingsRepositoryInterface>(
+    i.addLazySingleton<PrivacySettingsRepositoryInterface>(
       () => PrivacySettingsRepositoryImpl(
         Modular.get<DataConnectService>(),
       ),
     );
 
     // Use Cases
-    i.addSingleton(
+    i.addLazySingleton(
       () => GetProfileVisibilityUseCase(
         i<PrivacySettingsRepositoryInterface>(),
       ),
     );
-    i.addSingleton(
+    i.addLazySingleton(
       () => UpdateProfileVisibilityUseCase(
         i<PrivacySettingsRepositoryInterface>(),
       ),
     );
-    i.addSingleton(
+    i.addLazySingleton(
       () => GetTermsUseCase(
         i<PrivacySettingsRepositoryInterface>(),
       ),
     );
-    i.addSingleton(
+    i.addLazySingleton(
       () => GetPrivacyPolicyUseCase(
         i<PrivacySettingsRepositoryInterface>(),
       ),

apps/mobile/packages/features/staff/staff_main/lib/src/staff_main_module.dart

@@ -26,12 +26,12 @@ class StaffMainModule extends Module {
   @override
   void binds(Injector i) {
     // Register the StaffConnectorRepository from data_connect
-    i.addSingleton<StaffConnectorRepository>(
+    i.addLazySingleton<StaffConnectorRepository>(
       StaffConnectorRepositoryImpl.new,
     );
     
     // Register the use case from data_connect
-    i.addSingleton(
+    i.addLazySingleton(
       () => GetProfileCompletionUseCase(
         repository: i.get<StaffConnectorRepository>(),
       ),