A star that is bright, gives off blue light, and can have a world that mimics conditions on Earth is tricky. I'm hoping I can get one around a blue-colored white dwarf star.
What does the arrangement of this star system look like? Please give an idea of how the planetary rotation and orbital mechanics would need to work. If there are clear reasons this CAN'T work, a frame challenge is acceptable.
I want to have a human-habitable planet in orbit around a blue-colored white dwarf star. Life does not need to evolve in this system, just exist there for a reasonable timeframe (the planet can come from elsewhere via handwavium). The star should currently appear bright in the sky, and the planet should have a real or apparent day-night cycle somewhere between 20-30 hours (the planet can be tidally locked or nearly tidally locked, but if so, explain how do you achieve a day/night cycle).The planet needs to be in this location and in at least close to this condition for at least a million years prior (longer would be preferred, 65 million years is ideal).
Beyond that, the sky is the limit.