feat: copy emails from lead to customer (#38647)

feat: copy emails from lead to customer

(cherry picked from commit 906ac09)

Co-authored-by: barredterra <14891507+barredterra@users.noreply.github.com>

erpnext/selling/doctype/customer/customer.py

@@ -171,6 +171,7 @@ def on_update(self):
 
 		if self.flags.is_new_doc:
 			self.link_lead_address_and_contact()
+			self.copy_communication()
 
 		self.update_customer_groups()
 
@@ -224,6 +225,17 @@ def link_lead_address_and_contact(self):
 					linked_doc.append("links", dict(link_doctype="Customer", link_name=self.name))
 					linked_doc.save(ignore_permissions=self.flags.ignore_permissions)
 
+	def copy_communication(self):
+		if not self.lead_name or not frappe.db.get_single_value(
+			"CRM Settings", "carry_forward_communication_and_comments"
+		):
+			return
+
+		from erpnext.crm.utils import copy_comments, link_communications
+
+		copy_comments("Lead", self.lead_name, self)
+		link_communications("Lead", self.lead_name, self)
+
 	def validate_name_with_customer_group(self):
 		if frappe.db.exists("Customer Group", self.name):
 			frappe.throw(