feat: Add library directive to multiple BLoC and service files for improved organization

lib/blocs/account/account_bloc.dart

@@ -21,6 +21,7 @@
 /// ```dart
 /// accountBloc.close();
 /// ```
+library;
 import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:travel_mate/services/error_service.dart';

lib/blocs/account/account_state.dart

@@ -4,6 +4,7 @@
 /// instances. Subclasses should provide the relevant properties by
 /// overriding `props` so that the bloc can correctly determine whether
 /// the state has changed.
+library;
  
 /// Represents the initial state of the account feature.
 ///

lib/blocs/auth/auth_bloc.dart

@@ -19,6 +19,7 @@
 /// - [AuthAppleSignInRequested]: Processes Apple authentication
 /// - [AuthSignOutRequested]: Processes user sign-out
 /// - [AuthPasswordResetRequested]: Processes password reset requests
+library;
 import 'package:flutter_bloc/flutter_bloc.dart';
 import '../../repositories/auth_repository.dart';
 import 'auth_event.dart';

lib/blocs/balance/balance_bloc.dart

@@ -31,6 +31,7 @@
 ///   amount: 50.0,
 /// ));
 /// ```
+library;
 import 'package:flutter_bloc/flutter_bloc.dart';
 import '../../repositories/balance_repository.dart';
 import '../../repositories/expense_repository.dart';

lib/blocs/group/group_bloc.dart

@@ -31,6 +31,7 @@
 ///   members: [member1, member2],
 /// ));
 /// ```
+library;
 import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:travel_mate/services/error_service.dart';

lib/blocs/group/group_event.dart

@@ -12,6 +12,7 @@
 ///
 /// All events extend [GroupEvent] and implement [Equatable] for proper
 /// equality comparison in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 import '../../models/group.dart';
 import '../../models/group_member.dart';

lib/blocs/group/group_state.dart

@@ -12,6 +12,7 @@
 ///
 /// All states extend [GroupState] and implement [Equatable] for proper
 /// equality comparison and state change detection in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 import '../../models/group.dart';
 

lib/blocs/message/message_bloc.dart

@@ -39,6 +39,7 @@
 ///   reaction: '👍',
 /// ));
 /// ```
+library;
 import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import '../../models/message.dart';

lib/blocs/message/message_event.dart

@@ -14,6 +14,7 @@
 ///
 /// All events extend [MessageEvent] and implement [Equatable] for proper
 /// equality comparison in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 
 /// Base class for all message-related events.

lib/blocs/message/message_state.dart

@@ -15,6 +15,7 @@
 ///
 /// All states extend [MessageState] and implement [Equatable] for proper
 /// equality comparison and state change detection in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 import '../../models/message.dart';
 

lib/blocs/trip/trip_bloc.dart

@@ -35,6 +35,7 @@
 /// // Delete a trip
 /// tripBloc.add(TripDeleteRequested(tripId: 'tripId456'));
 /// ```
+library;
 import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:travel_mate/models/trip.dart';

lib/blocs/trip/trip_event.dart

@@ -14,6 +14,7 @@
 ///
 /// All events extend [TripEvent] and implement [Equatable] for proper
 /// equality comparison in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 import '../../models/trip.dart';
 

lib/blocs/trip/trip_state.dart

@@ -15,6 +15,7 @@
 ///
 /// All states extend [TripState] and implement [Equatable] for proper
 /// equality comparison and state change detection in the BLoC pattern.
+library;
 import 'package:equatable/equatable.dart';
 import '../../models/trip.dart';
 

lib/components/account/account_content.dart

@@ -18,6 +18,7 @@
 ///
 /// The component automatically loads account data when initialized and
 /// provides a clean interface for managing group-based expenses.
+library;
 import 'package:flutter/material.dart';
 import 'package:travel_mate/blocs/user/user_bloc.dart';
 import '../../models/account.dart';

lib/components/account/add_expense_dialog.dart

@@ -55,6 +55,7 @@
 /// - Expense
 /// - Group
 /// - ExpenseBloc
+library;
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';

lib/components/account/balances_tab.dart

@@ -3,6 +3,7 @@
 /// the amount they owe, and their overall balance status (to pay, to receive, or balanced).
 ///
 /// The widget handles both light and dark themes and provides a fallback UI for empty balance lists.
+library;
 
 import 'package:flutter/material.dart';
 import '../../models/user_balance.dart';

lib/components/account/expense_detail_dialog.dart

@@ -5,6 +5,7 @@
 /// The dialog is highly interactive and adapts its UI based on the current user's permissions and the state
 /// of the expense. It also integrates with BLoC for state management and supports features like receipt display
 /// and split payment marking.
+library;
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';

lib/services/balance_service.dart

@@ -31,6 +31,7 @@
 /// - [GroupBalance] for the complete balance structure
 /// - [Settlement] for individual payment recommendations
 /// - [UserBalance] for per-user balance information
+library;
 import '../models/group_balance.dart';
 import '../models/expense.dart';
 import '../models/group_statistics.dart';

lib/services/storage_service.dart

@@ -24,6 +24,7 @@
 /// // Delete a file
 /// await storageService.deleteFile(fileUrl);
 /// ```
+library;
 import 'dart:io';
 import 'dart:typed_data';
 import 'package:firebase_storage/firebase_storage.dart';

lib/services/trip_service.dart

@@ -24,6 +24,7 @@
 /// // Calculate trip statistics
 /// final stats = await tripService.getTripStatistics(tripId);
 /// ```
+library;
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:travel_mate/services/error_service.dart';
 import '../models/trip.dart';