The Zombie Emperor Becomes the Apocalypse’s Favorite

[Strong heroine + apocalypse + satisfying revenge + punishing scumbags + pocket dimension] In her past life, she was helplessly manipulated on a cold operating table, enduring nothing but humiliation. Given another chance at life, she will make everyone who betrayed her pay. In this hellish world, she has a pack of zombie underlings who adore her and companions she can trust. In return, she is willing to use her abilities to build them a brand-new, beautiful homeland. The rain will eventually stop, and the sun will rise again. May goodness be with you, may everyone with a kind heart see their wishes fulfilled, and may everyone find happiness through hardship. (The story is set on an apocalyptic Earth at first, with interstellar battles later on. The heroine focuses on building her cause with her friends, and the male lead may appear somewhat later.)