feat: ajout de la gestion de la préparation d'un événement avec page permettant de le gérer

em2rp/lib/main.dart

@@ -13,6 +13,7 @@ import 'package:em2rp/views/container_form_page.dart';
 import 'package:em2rp/views/container_detail_page.dart';
 import 'package:em2rp/views/event_preparation_page.dart';
 import 'package:em2rp/models/container_model.dart';
+import 'package:em2rp/models/event_model.dart';
 import 'package:firebase_auth/firebase_auth.dart';
 import 'package:flutter/material.dart';
 import 'package:firebase_core/firebase_core.dart';
@@ -152,9 +153,12 @@ class MyApp extends StatelessWidget {
           );
         },
         '/event_preparation': (context) {
-          final eventId = ModalRoute.of(context)!.settings.arguments as String;
+          final args = ModalRoute.of(context)!.settings.arguments as Map<String, dynamic>;
+          final event = args['event'] as EventModel;
           return AuthGuard(
-            child: EventPreparationPage(eventId: eventId),
+            child: EventPreparationPage(
+              initialEvent: event,
+            ),
           );
         },
       },