Fix: Resolve critical linting issues and bugs (concurrency, syntax, dead code)

apps/mobile/packages/core/lib/src/presentation/mixins/bloc_error_handler.dart

@@ -1,5 +1,5 @@
 import 'dart:developer' as developer;
-import 'package:flutter_bloc/flutter_bloc.dart';
+
 import 'package:krow_domain/krow_domain.dart';
 
 /// Mixin to standardize error handling across all BLoCs.
@@ -45,7 +45,7 @@ mixin BlocErrorHandler<S> {
   ///    - Logs full error and stack trace
   ///    - Emits generic error state
   Future<void> handleError({
-    required Emitter<S> emit,
+    required void Function(S) emit,
     required Future<void> Function() action,
     required S Function(String errorKey) onError,
     String? loggerName,