fix: update CustomerSourceTypeWebChat to use ExternalSourceGuest and adjust related mappings

Co-authored-by: Copilot <copilot@github.com>

internal/pkg/enums/customer.go

@@ -1,6 +1,6 @@
 package enums
 
-const CustomerSourceTypeWebChat = ExternalSourceWebChat
+const CustomerSourceTypeWebChat = ExternalSourceGuest
 
 func GetCustomerSourceTypeLabel(sourceType ExternalSource) string {
 	return GetExternalSourceLabel(ExternalSource(sourceType))

internal/pkg/enums/external_identity.go

@@ -6,14 +6,12 @@ package enums
 type ExternalSource string
 
 const (
-	ExternalSourceWebChat  ExternalSource = "guest"
-	ExternalSourceWechatMP ExternalSource = "wechat_mp"
+	ExternalSourceGuest    ExternalSource = "guest"
 	ExternalSourceWxWorkKF ExternalSource = "wxwork_kf"
 )
 
 var externalSourceLabelMap = map[ExternalSource]string{
-	ExternalSourceWebChat:  "访客",
-	ExternalSourceWechatMP: "微信公众号",
+	ExternalSourceGuest:    "访客",
 	ExternalSourceWxWorkKF: "企业微信客服",
 }
 
@@ -27,7 +25,7 @@ func GetExternalSourceLabel(v ExternalSource) string {
 // IsAllowedOpenImExternalSource 开放 IM 入口允许的外部来源（闭集校验）。
 func IsAllowedOpenImExternalSource(s ExternalSource) bool {
 	switch s {
-	case ExternalSourceWebChat, ExternalSourceWechatMP:
+	case ExternalSourceGuest:
 		return true
 	default:
 		return false