The rebbe watches you
So? Is it Kefira to think that the Rebbe sees you from Olam HaEmes? Why don’t we wear Tzitzis out in a Beis Hachaim?
he’s omniscient,
And even while he was alive, is it Kefira to think that he can see things happening far away, or the future, for example? If you read many stories from the Baal Shem Tov or from the Chozeh, it’s not an unusual belief.
omnipotent
Only Hashem is omnipotent. Hashem can choose to listen to the Rebbe’s “decrees”.