Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

common/ysphone/phone.go

@@ -0,0 +1,11 @@
+package ysphone
+
+import "github.com/nyaruka/phonenumbers"
+
+func FormatPhoneNumber(phoneNumber string) string {
+	if phoneNumber == "" {
+		return ""
+	}
+	num, _ := phonenumbers.Parse(phoneNumber, "CN")
+	return phonenumbers.Format(num, phonenumbers.E164)
+}