feat: sync public links and phone change updates

internal/domain/phone_change.go

@@ -0,0 +1,18 @@
+package domain
+
+// PhoneChangeRequest 是账号改号的持久化命令。PG 实现必须把 User、Event 与
+// dispatch outbox 放在同一事务；Exclude* 精确排除发起设备，因为当前设备从
+// account.changePhone 的 User 返回值更新本地状态。
+type PhoneChangeRequest struct {
+	UserID           int64
+	Phone            string
+	Date             int
+	ExcludeAuthKeyID [8]byte
+	ExcludeSessionID int64
+}
+
+type PhoneChangeResult struct {
+	User    User
+	Event   UpdateEvent
+	Changed bool
+}