refactor: remove analytics module, update tool postprocessor tests

apps/lib/features/chat/presentation/bloc/chat_bloc.dart

@@ -12,7 +12,6 @@ import 'package:social_app/core/chat/chat_list_item.dart';
 import 'package:social_app/core/chat/chat_orchestrator.dart';
 import 'package:social_app/core/chat/chat_history_repository.dart';
 import 'package:social_app/core/chat/chat_timeline_reconciler.dart';
-import 'package:social_app/core/analytics/tracker.dart';
 import 'package:social_app/core/l10n/l10n.dart';
 import 'chat_bloc_recovery_utils.dart';
 
@@ -318,14 +317,7 @@ class ChatBloc extends Cubit<ChatState> implements ChatOrchestrator {
         messageCount: 1,
         responseTimeMs: responseTimeMs,
       );
-      return;
     }
-    AnalyticsTracker.instance.trackAgentChatCompleted(
-      conversationId: conversationId,
-      scenario: 'assistant',
-      messageCount: 1,
-      responseTimeMs: responseTimeMs,
-    );
   }
 
   void _clearRunMetrics() {