improvement: attachment selection for lab dispatch added. attachment preview added to cases feature.

backend/src/modules/treatments/treatments.service.ts

@@ -56,6 +56,13 @@ const treatmentInclude = {
         include: { organization: { select: { id: true, name: true } } },
       },
       toothProsthesis: true,
+      attachments: {
+        include: {
+          attachment: {
+            select: { id: true, fileName: true, mimeType: true, sizeBytes: true, createdAt: true },
+          },
+        },
+      },
     },
   },
 };
@@ -427,6 +434,29 @@ export class TreatmentsService {
             })),
           });
         }
+
+        await tx.labCaseAttachment.deleteMany({ where: { labCaseId: row.id } });
+        const attachmentIds = lc.attachmentIds ?? [];
+        if (attachmentIds.length > 0) {
+          const validAttachments = await tx.treatmentDetailAttachment.findMany({
+            where: {
+              id: { in: attachmentIds },
+              detailId: { in: lc.treatmentDetailIds },
+            },
+            select: { id: true },
+          });
+          if (validAttachments.length !== attachmentIds.length) {
+            throw new BadRequestException(
+              'One or more attachments are invalid for this lab case',
+            );
+          }
+          await tx.labCaseAttachment.createMany({
+            data: attachmentIds.map((attachmentId) => ({
+              labCaseId: row.id,
+              attachmentId,
+            })),
+          });
+        }
       }
 
       return tx.treatment.findUniqueOrThrow({
@@ -766,6 +796,15 @@ export class TreatmentsService {
       tooth: string;
       prosthesisTypeCode: string;
     }>;
+    attachments?: Array<{
+      attachment: {
+        id: string;
+        fileName: string;
+        mimeType: string;
+        sizeBytes: number;
+        createdAt: Date;
+      };
+    }>;
   }) {
     return {
       id: lc.id,
@@ -784,6 +823,13 @@ export class TreatmentsService {
         tooth: tp.tooth,
         prosthesisTypeCode: tp.prosthesisTypeCode,
       })),
+      attachments: (lc.attachments ?? []).map((row) => ({
+        id: row.attachment.id,
+        fileName: row.attachment.fileName,
+        mimeType: row.attachment.mimeType,
+        sizeBytes: row.attachment.sizeBytes,
+        createdAt: row.attachment.createdAt.toISOString(),
+      })),
       sends:
         lc.sends?.map((s) => ({
           organizationId: s.organizationId,