feat(#138,#143,#144): fiche enfant admin, consentement photo et fix gestionnaire.

Squash merge develop → master.
- #138 : modale enfant paysage, zone AM/scolarisation, liens responsables
- #144 : persistance consent_photo à l'inscription enfant
- #143 : masquer Supprimer sur la propre fiche gestionnaire

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/enfants/enfants.service.ts

@@ -120,7 +120,13 @@ export class EnfantsService {
     const child = await this.childrenRepository.findOne({ where: { id } });
     if (!child) throw new NotFoundException('Enfant introuvable');
 
-    await this.childrenRepository.update(id, dto);
+    const patch: Partial<Children> = { ...dto } as Partial<Children>;
+    if (dto.consent_photo !== undefined) {
+      patch.consent_photo = dto.consent_photo;
+      patch.consent_photo_at = dto.consent_photo ? new Date() : null!;
+    }
+
+    await this.childrenRepository.update(id, patch);
     return this.findOne(id, currentUser);
   }