feat(#135): mode édition dossier (PATCH fiche, co-parent, enfants).

Wizard edit famille/AM depuis la liste Dossiers ; save parents +
co-parent ; enfants existants en PATCH (photo multipart) sans POST doublon.

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

backend/src/routes/enfants/enfants.controller.ts

@@ -141,12 +141,20 @@ export class EnfantsController {
     RoleType.GESTIONNAIRE,
   )
   @Patch(':id')
+  @ApiOperation({
+    summary: 'Mettre à jour un enfant',
+    description:
+      'JSON sans photo OK ; avec nouvelle photo → multipart (champ fichier `photo`, max 5 Mo).',
+  })
+  @ApiConsumes('application/json', 'multipart/form-data')
+  @UseInterceptors(OptionalEnfantPhotoInterceptor)
   update(
     @Param('id', new ParseUUIDPipe()) id: string,
     @Body() dto: UpdateEnfantsDto,
+    @UploadedFile() photo: Express.Multer.File,
     @User() currentUser: Users,
   ) {
-    return this.enfantsService.update(id, dto, currentUser);
+    return this.enfantsService.update(id, dto, currentUser, photo);
   }
 
   @Roles(RoleType.SUPER_ADMIN)

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

@@ -195,7 +195,12 @@ export class EnfantsService {
 
 
   // Mise à jour
-  async update(id: string, dto: Partial<CreateEnfantsDto>, currentUser: Users): Promise<Children> {
+  async update(
+    id: string,
+    dto: Partial<CreateEnfantsDto>,
+    currentUser: Users,
+    photoFile?: Express.Multer.File,
+  ): Promise<Children> {
     const child = await this.childrenRepository.findOne({ where: { id } });
     if (!child) throw new NotFoundException('Enfant introuvable');
 
@@ -205,6 +210,13 @@ export class EnfantsService {
       patch.consent_photo = dto.consent_photo;
       patch.consent_photo_at = dto.consent_photo ? new Date() : null!;
     }
+    if (photoFile) {
+      patch.photo_url = `/uploads/photos/${photoFile.filename}`;
+      if (dto.consent_photo !== false) {
+        patch.consent_photo = true;
+        patch.consent_photo_at = new Date();
+      }
+    }
 
     await this.childrenRepository.update(id, patch);
     return this.findOne(id, currentUser);