Theft of (someone's) thunder

Translation of "theft of (someone's) thunder" into Russian

присвоение (чьих-то) заслуг

She accused him of the theft of her thunder when he presented her idea as his own.

Она обвинила его в присвоении её заслуг, когда он представил её идею как свою.

The act of taking credit for someone else's idea, achievement, or success, often overshadowing or diminishing the original person's contribution.