Refactor event type handling and add data management page (options and event types)

em2rp/lib/models/option_model.dart

@@ -1,6 +1,6 @@
-
 class EventOption {
   final String id;
+  final String code; // Nouveau champ code
   final String name;
   final String details;
   final double valMin;
@@ -9,6 +9,7 @@ class EventOption {
 
   EventOption({
     required this.id,
+    required this.code,
     required this.name,
     required this.details,
     required this.valMin,
@@ -19,6 +20,7 @@ class EventOption {
   factory EventOption.fromMap(Map<String, dynamic> map, String id) {
     return EventOption(
       id: id,
+      code: map['code'] ?? id, // Utilise le code ou l'ID en fallback
       name: map['name'] ?? '',
       details: map['details'] ?? '',
       valMin: (map['valMin'] ?? 0.0).toDouble(),
@@ -31,6 +33,7 @@ class EventOption {
 
   Map<String, dynamic> toMap() {
     return {
+      'code': code,
       'name': name,
       'details': details,
       'valMin': valMin,