Refactor ActivityCard UI and improve voting functionality

- Updated ActivityCard layout for better visual consistency and responsiveness.
- Simplified the category badge and adjusted styles for better readability.
- Enhanced the voting section with a progress bar and improved button designs.
- Added a new method in Activity model to check if all trip participants approved an activity.
- Improved error handling and validation in ActivityRepository for voting and fetching activities.
- Implemented pagination in ActivityPlacesService for activity searches.
- Removed outdated scripts for cleaning up duplicate images.

lib/blocs/activity/db_activities/db_activity_state.dart

@@ -0,0 +1,86 @@
+import 'package:equatable/equatable.dart';
+import '../../../models/activity.dart';
+
+/// States pour les activités de la base de données
+abstract class DbActivityState extends Equatable {
+  const DbActivityState();
+
+  @override
+  List<Object?> get props => [];
+}
+
+/// État initial
+class DbActivityInitial extends DbActivityState {
+  const DbActivityInitial();
+}
+
+/// État de chargement
+class DbActivityLoading extends DbActivityState {
+  const DbActivityLoading();
+}
+
+/// État de recherche
+class DbActivitySearching extends DbActivityState {
+  const DbActivitySearching();
+}
+
+/// État avec les activités chargées
+class DbActivityLoaded extends DbActivityState {
+  final List<Activity> activities;
+  final List<String> tripParticipants;
+
+  const DbActivityLoaded({
+    required this.activities,
+    required this.tripParticipants,
+  });
+
+  @override
+  List<Object?> get props => [activities, tripParticipants];
+
+  /// Créer une copie avec des modifications
+  DbActivityLoaded copyWith({
+    List<Activity>? activities,
+    List<String>? tripParticipants,
+  }) {
+    return DbActivityLoaded(
+      activities: activities ?? this.activities,
+      tripParticipants: tripParticipants ?? this.tripParticipants,
+    );
+  }
+}
+
+/// État avec résultats de recherche
+class DbActivitySearchResults extends DbActivityState {
+  final List<Activity> results;
+  final String query;
+  final List<String> tripParticipants;
+
+  const DbActivitySearchResults({
+    required this.results,
+    required this.query,
+    required this.tripParticipants,
+  });
+
+  @override
+  List<Object?> get props => [results, query, tripParticipants];
+}
+
+/// État de succès d'opération
+class DbActivityOperationSuccess extends DbActivityState {
+  final String message;
+
+  const DbActivityOperationSuccess(this.message);
+
+  @override
+  List<Object?> get props => [message];
+}
+
+/// État d'erreur
+class DbActivityError extends DbActivityState {
+  final String message;
+
+  const DbActivityError(this.message);
+
+  @override
+  List<Object?> get props => [message];
+}