add edit & delete button to tender & update contacts dashbaord

backend/src/modules/tenders/tenders.service.ts

@@ -125,6 +125,62 @@ class TendersService {
     }
   }
 
+  async delete(id: string, userId: string) {
+    const tender = await prisma.tender.findUnique({
+      where: { id },
+      include: {
+        attachments: true,
+        directives: {
+          include: {
+            attachments: true,
+          },
+        },
+        convertedDeal: {
+          select: { id: true },
+        },
+      },
+    });
+
+    if (!tender) {
+      throw new AppError(404, 'Tender not found');
+    }
+
+    if (tender.convertedDeal) {
+      throw new AppError(400, 'Cannot delete tender that has been converted to deal');
+    }
+
+    for (const attachment of tender.attachments || []) {
+      if (attachment.path && fs.existsSync(attachment.path)) {
+        fs.unlinkSync(attachment.path);
+      }
+    }
+
+    for (const directive of tender.directives || []) {
+      for (const attachment of directive.attachments || []) {
+        if (attachment.path && fs.existsSync(attachment.path)) {
+          fs.unlinkSync(attachment.path);
+        }
+      }
+    }
+
+    await prisma.tender.delete({
+      where: { id },
+    });
+
+    await AuditLogger.log({
+      entityType: 'TENDER',
+      entityId: id,
+      action: 'DELETE',
+      userId,
+      changes: {
+        deletedTenderNumber: tender.tenderNumber,
+        deletedTitle: tender.title,
+      },
+    });
+
+    return true;
+  }
+
   private buildTenderNotes(
     plainNotes?: string | null,
     extra?: {