feat(#140): dashboard admin ch.6 — fiche parent, enfants, affiliation

Back: PATCH /parents/:id/fiche, attach/detach enfant, GET /enfants enrichi.
Front: modale parent éditable, onglet Enfants, fiche enfant, UserService.

Couvre doc 28 §6.1–6.2 ; tickets liés #115 #116 #130 #131 #137 #138.
Hors scope: fiche AM (#131), création admin (#129).

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

backend/src/routes/parents/parents.module.ts

@@ -4,6 +4,7 @@ import { ConfigModule, ConfigService } from '@nestjs/config';
 import { JwtModule } from '@nestjs/jwt';
 import { Parents } from 'src/entities/parents.entity';
 import { DossierFamille, DossierFamilleEnfant } from 'src/entities/dossier_famille.entity';
+import { ParentsChildren } from 'src/entities/parents_children.entity';
 import { ParentsController } from './parents.controller';
 import { ParentsService } from './parents.service';
 import { Users } from 'src/entities/users.entity';
@@ -11,7 +12,7 @@ import { UserModule } from '../user/user.module';
 
 @Module({
     imports: [
-        TypeOrmModule.forFeature([Parents, Users, DossierFamille, DossierFamilleEnfant]),
+        TypeOrmModule.forFeature([Parents, Users, DossierFamille, DossierFamilleEnfant, ParentsChildren]),
         forwardRef(() => UserModule),
         JwtModule.registerAsync({
             imports: [ConfigModule],