feat: gérer l'ordre des champs personnalisés

src/custom-fields/custom-fields.service.ts

@@ -209,12 +209,20 @@ export class CustomFieldsService {
       if (existingField) {
         targetCustomFieldId = existingField.id;
       } else {
+        const normalizedType = (customFieldType || 'text').trim() || 'text';
+        const normalizedRequired = !!customFieldRequired;
+        const orderScope = { [customFieldTypeField]: typeId } as const;
+        const nextOrderIndex = await this.prisma.customField.count({
+          where: orderScope,
+        });
+
         const createdField = await this.prisma.customField.create({
           data: {
             name: normalizedName,
-            type: (customFieldType || 'text').trim() || 'text',
-            required: !!customFieldRequired,
+            type: normalizedType,
+            required: normalizedRequired,
             options: normalizedOptions,
+            orderIndex: nextOrderIndex,
             [customFieldTypeField]: typeId,
           },
         });