refactor: Rename date parsing helper functions for consistency

em2rp/lib/views/widgets/event_form/event_assigned_equipment_section.dart

@@ -10,7 +10,6 @@ import 'package:em2rp/services/data_service.dart';
 import 'package:em2rp/services/api_service.dart';
 import 'package:em2rp/utils/colors.dart';
 import 'package:em2rp/views/widgets/event/equipment_selection_dialog.dart';
-import 'package:em2rp/views/widgets/event/equipment_conflict_dialog.dart';
 import 'package:em2rp/services/event_availability_service.dart';
 
 /// Section pour afficher et gérer le matériel assigné à un événement
@@ -40,8 +39,8 @@ class _EventAssignedEquipmentSectionState extends State<EventAssignedEquipmentSe
   bool get _canAddMaterial => widget.startDate != null && widget.endDate != null;
   final EventAvailabilityService _availabilityService = EventAvailabilityService();
   final DataService _dataService = DataService(FirebaseFunctionsApiService());
-  Map<String, EquipmentModel> _equipmentCache = {};
-  Map<String, ContainerModel> _containerCache = {};
+  final Map<String, EquipmentModel> _equipmentCache = {};
+  final Map<String, ContainerModel> _containerCache = {};
   bool _isLoading = true;
 
   @override
@@ -491,7 +490,7 @@ class _EventAssignedEquipmentSectionState extends State<EventAssignedEquipmentSe
                     ...widget.assignedContainers.map((containerId) {
                       final container = _containerCache[containerId];
                       return _buildContainerItem(container);
-                    }).toList(),
+                    }),
                     const SizedBox(height: 16),
                   ],
 
@@ -508,7 +507,7 @@ class _EventAssignedEquipmentSectionState extends State<EventAssignedEquipmentSe
                     ..._getStandaloneEquipment().map((eq) {
                       final equipment = _equipmentCache[eq.equipmentId];
                       return _buildEquipmentItem(equipment, eq);
-                    }).toList(),
+                    }),
                   ],
                 ],
               ),
@@ -597,7 +596,7 @@ class _EventAssignedEquipmentSectionState extends State<EventAssignedEquipmentSe
                           ],
                         ),
                       );
-                    }).toList(),
+                    }),
                   ],
                 ),
               );

em2rp/lib/views/widgets/event_form/event_basic_info_section.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:intl/intl.dart';
 import 'package:em2rp/models/event_type_model.dart';
 import 'package:em2rp/views/widgets/event_form/price_ht_ttc_fields.dart';