improvement: treatments UI/UX updated again to minimize clicking and scrolling.

backend/src/modules/cases/cases.controller.ts

@@ -1,6 +1,7 @@
 import {
   Body,
   Controller,
+  Delete,
   Get,
   Param,
   Patch,
@@ -92,6 +93,13 @@ export class CasesController {
     return this.casesService.startInternal(id, organizationId, req.user.id, req.user.language);
   }
 
+  @Delete(':id')
+  @ApiOperation({ summary: 'Delete an unstarted lab-origin draft (TAB_CASES_EDIT)' })
+  deleteDraft(@Param('id') id: string, @Req() req) {
+    const organizationId = this.casesService.getOrganizationIdFromUser(req.user);
+    return this.casesService.deleteInternalDraft(id, organizationId, req.user.id);
+  }
+
   @Post(':id/lines/:lineClientKey/attachments')
   @ApiOperation({ summary: 'Upload attachments for a lab-origin draft line' })
   @ApiConsumes('multipart/form-data')

backend/src/modules/cases/cases.service.ts

@@ -4,7 +4,7 @@ import {
 } from '@nestjs/common';
 import { AppException, ErrorCode } from '../../common/errors';
 import { randomUUID } from 'crypto';
-import { createReadStream, existsSync, mkdirSync } from 'fs';
+import { createReadStream, existsSync, mkdirSync, unlinkSync } from 'fs';
 import { join } from 'path';
 import { CatalogEntityKind, LabCaseActivityType, LabCaseOrigin, LabTaskStatus, LinkStatus, Prisma, UserNotificationType } from '@prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
@@ -565,6 +565,56 @@ export class CasesService {
     return { success: true, data: await this.mapLabCaseDetail(refreshed, localeInput) };
   }
 
+  async deleteInternalDraft(
+    labCaseId: string,
+    labOrganizationId: string,
+    actorUserId: string,
+  ) {
+    await this.assertCanEditCases(actorUserId, labOrganizationId);
+    const existing = await this.prisma.labCase.findFirst({
+      where: {
+        id: labCaseId,
+        origin: LabCaseOrigin.LAB_INTERNAL,
+        destinationOrganizationId: labOrganizationId,
+      },
+      select: {
+        id: true,
+        startedAt: true,
+        attachments: { include: { attachment: { select: { id: true, storagePath: true } } } },
+      },
+    });
+    if (!existing) {
+      throw new AppException(ErrorCode.CASE_NOT_FOUND, HttpStatus.NOT_FOUND);
+    }
+    if (existing.startedAt) {
+      throw new AppException(ErrorCode.LAB_CASE_ALREADY_STARTED, HttpStatus.CONFLICT);
+    }
+
+    const orphanAttachments = existing.attachments.map((row) => row.attachment);
+    const orphanIds = orphanAttachments.map((row) => row.id);
+
+    await this.prisma.$transaction(async (tx) => {
+      await tx.labCase.delete({ where: { id: labCaseId } });
+      if (orphanIds.length > 0) {
+        await tx.treatmentDetailAttachment.deleteMany({
+          where: { id: { in: orphanIds }, detailId: null },
+        });
+      }
+    });
+
+    for (const attachment of orphanAttachments) {
+      try {
+        if (attachment.storagePath && existsSync(attachment.storagePath)) {
+          unlinkSync(attachment.storagePath);
+        }
+      } catch {
+        // Best-effort disk cleanup; the draft row is already gone.
+      }
+    }
+
+    return { success: true };
+  }
+
   async uploadInternalAttachments(
     labCaseId: string,
     lineClientKey: string,

backend/src/modules/treatments/dto/treatment.dto.ts

@@ -1,5 +1,4 @@
 import {
-  ArrayMinSize,
   IsArray,
   IsBoolean,
   IsDateString,
@@ -61,7 +60,6 @@ export class SaveTreatmentDetailDto {
 
 export class SaveTreatmentDraftDto {
   @IsArray()
-  @ArrayMinSize(1)
   @ValidateNested({ each: true })
   @Type(() => SaveTreatmentDetailDto)
   details: SaveTreatmentDetailDto[];