feat(#159): suppressions métier dossiers/parents/enfants/AM/staff.

SuppressionService + DELETE /dossiers/:numero, cascades DELETE /users et
DELETE /enfants?deleteDossier, flag sans_enfant, specs front #160.

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

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

@@ -13,6 +13,7 @@ import {
   ParseUUIDPipe,
   Patch,
   Post,
+  Query,
   UploadedFile,
   UseGuards,
   UseInterceptors,
@@ -23,6 +24,7 @@ import {
   ApiBody,
   ApiConsumes,
   ApiOperation,
+  ApiQuery,
   ApiTags,
 } from '@nestjs/swagger';
 import { diskStorage } from 'multer';
@@ -36,6 +38,7 @@ import { User } from 'src/common/decorators/user.decorator';
 import { AuthGuard } from 'src/common/guards/auth.guard';
 import { Roles } from 'src/common/decorators/roles.decorator';
 import { RolesGuard } from 'src/common/guards/roles.guard';
+import { SuppressionService } from '../suppressions/suppression.service';
 
 const photoMulterOptions = {
   storage: diskStorage({
@@ -83,7 +86,10 @@ class OptionalEnfantPhotoInterceptor implements NestInterceptor {
 @UseGuards(AuthGuard, RolesGuard)
 @Controller('enfants')
 export class EnfantsController {
-  constructor(private readonly enfantsService: EnfantsService) { }
+  constructor(
+    private readonly enfantsService: EnfantsService,
+    private readonly suppressionService: SuppressionService,
+  ) { }
 
   @Roles(
     RoleType.PARENT,
@@ -157,9 +163,31 @@ export class EnfantsController {
     return this.enfantsService.update(id, dto, currentUser, photo);
   }
 
-  @Roles(RoleType.SUPER_ADMIN)
+  @Roles(
+    RoleType.SUPER_ADMIN,
+    RoleType.ADMINISTRATEUR,
+    RoleType.GESTIONNAIRE,
+  )
   @Delete(':id')
-  remove(@Param('id', new ParseUUIDPipe()) id: string) {
-    return this.enfantsService.remove(id);
+  @ApiOperation({
+    summary: 'Supprimer un enfant (#159)',
+    description:
+      'Query `deleteDossier=true` si dernier enfant et suppression du dossier famille souhaitée.',
+  })
+  @ApiQuery({
+    name: 'deleteDossier',
+    required: false,
+    description: 'Si true et dernier enfant : cascade dossier famille',
+  })
+  remove(
+    @Param('id', new ParseUUIDPipe()) id: string,
+    @Query('deleteDossier') deleteDossier: string | undefined,
+    @User() currentUser: Users,
+  ) {
+    const flag =
+      deleteDossier === 'true' ||
+      deleteDossier === '1' ||
+      deleteDossier === 'yes';
+    return this.suppressionService.deleteEnfant(id, flag, currentUser);
   }
 }