My colleague and I do a similar job and sit next to each other. We mainly get on fine but she's openly told the wider team, in a jokey way, to playing "power games" with me, her words. It sounds petty but she does it by moving closer to my side of the desk when she eats breakfast and lunch so her end doesn't get messy. Not that she's a particularly messy person, that isn't the point.
I don't like conflict which is probably why she does it but I feel undermined and quite embarrassed her calling it power games. Our manager is aware but he's passive and treats it as a joke.
Just wondering how to navigate without causing offence or embarrassing her or me. Thanks