feat(#112): reprise après refus — dossier complet GET/PATCH

- GET reprise-dossier : parents[], enfants[], texte_motivation (famille) ou fiche AM (#119)
- PATCH reprise-resoumettre : co-parent, enfants (update par id), motivation, fiche AM
- Resoumission famille : tous les parents en en_attente + invalidation token groupée
- DTOs étendus + est_multiple sur enfants dossier famille
- Tests unitaires getRepriseDossier parent/AM

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

backend/src/routes/auth/auth.service.spec.ts

@@ -5,11 +5,13 @@ import { getRepositoryToken } from '@nestjs/typeorm';
 import { ConfigService } from '@nestjs/config';
 import { AuthService } from './auth.service';
 import { UserService } from '../user/user.service';
+import { ParentsService } from '../parents/parents.service';
+import { DossiersService } from '../dossiers/dossiers.service';
 import { AppConfigService } from 'src/modules/config/config.service';
 import { MailService } from 'src/modules/mail/mail.service';
 import { NumeroDossierService } from 'src/modules/numero-dossier/numero-dossier.service';
 import { Parents } from 'src/entities/parents.entity';
-import { Users } from 'src/entities/users.entity';
+import { Users, RoleType, StatutUtilisateurType } from 'src/entities/users.entity';
 import { Children } from 'src/entities/children.entity';
 import { AssistanteMaternelle } from 'src/entities/assistantes_maternelles.entity';
 
@@ -19,6 +21,20 @@ describe('AuthService (#118 create-password API)', () => {
     findOne: jest.fn(),
     createQueryBuilder: jest.fn(),
     update: jest.fn(),
+    manager: { transaction: jest.fn() },
+  };
+
+  const userServiceMock = {
+    findByTokenReprise: jest.fn(),
+  };
+
+  const parentsServiceMock = {
+    getDossierFamilleByNumero: jest.fn(),
+    getFamilyUserIds: jest.fn(),
+  };
+
+  const dossiersServiceMock = {
+    getDossierByNumero: jest.fn(),
   };
 
   const mailServiceMock = {
@@ -45,7 +61,9 @@ describe('AuthService (#118 create-password API)', () => {
     const module: TestingModule = await Test.createTestingModule({
       providers: [
         AuthService,
-        { provide: UserService, useValue: {} },
+        { provide: UserService, useValue: userServiceMock },
+        { provide: ParentsService, useValue: parentsServiceMock },
+        { provide: DossiersService, useValue: dossiersServiceMock },
         { provide: JwtService, useValue: {} },
         { provide: ConfigService, useValue: { get: jest.fn() } },
         { provide: AppConfigService, useValue: appConfigMock },
@@ -136,4 +154,69 @@ describe('AuthService (#118 create-password API)', () => {
       expect(exec).toHaveBeenCalled();
     });
   });
+
+  describe('Reprise après refus (#112)', () => {
+    const token = '11111111-1111-1111-1111-111111111111';
+
+    it('getRepriseDossier throws when token invalid', async () => {
+      userServiceMock.findByTokenReprise.mockResolvedValue(null);
+      await expect(service.getRepriseDossier(token)).rejects.toThrow(NotFoundException);
+    });
+
+    it('getRepriseDossier returns famille complète pour parent', async () => {
+      userServiceMock.findByTokenReprise.mockResolvedValue({
+        id: 'p1',
+        email: 'claire@test.fr',
+        prenom: 'Claire',
+        nom: 'MARTIN',
+        role: RoleType.PARENT,
+        numero_dossier: '2026-000021',
+        statut: StatutUtilisateurType.REFUSE,
+      });
+      parentsServiceMock.getDossierFamilleByNumero.mockResolvedValue({
+        numero_dossier: '2026-000021',
+        parents: [{ user_id: 'p1', email: 'claire@test.fr', statut: StatutUtilisateurType.REFUSE }],
+        enfants: [{ id: 'e1', first_name: 'Emma', status: 'actif' }],
+        texte_motivation: 'Motivation test',
+      });
+
+      const result = await service.getRepriseDossier(token);
+      expect(result.parents).toHaveLength(1);
+      expect(result.enfants).toHaveLength(1);
+      expect(result.texte_motivation).toBe('Motivation test');
+      expect(result.numero_dossier).toBe('2026-000021');
+    });
+
+    it('getRepriseDossier returns fiche AM complète', async () => {
+      userServiceMock.findByTokenReprise.mockResolvedValue({
+        id: 'am1',
+        email: 'am@test.fr',
+        role: RoleType.ASSISTANTE_MATERNELLE,
+        numero_dossier: '2026-000003',
+      });
+      dossiersServiceMock.getDossierByNumero.mockResolvedValue({
+        type: 'am',
+        dossier: {
+          numero_dossier: '2026-000003',
+          user: {
+            id: 'am1',
+            email: 'am@test.fr',
+            prenom: 'Marie',
+            nom: 'DUPONT',
+            statut: StatutUtilisateurType.REFUSE,
+          },
+          numero_agrement: 'AGR-1',
+          nir: '123456789012345',
+          biographie: 'Bio',
+          nb_max_enfants: 4,
+          place_disponible: 2,
+        },
+      });
+
+      const result = await service.getRepriseDossier(token);
+      expect(result.numero_agrement).toBe('AGR-1');
+      expect(result.biographie).toBe('Bio');
+      expect(result.nb_max_enfants).toBe(4);
+    });
+  });
 });