Star Dome, at the End of Life, How Can One Survive?

[One heroine: Robin. Plenty of original worldbuilding and plot. A simple romance? “Absolutely no angst.” Slow burn, not a power fantasy, and doesn't follow the main story.] Allow me to introduce myself. People have given me many titles: a traveler of the “Thousand Worlds,” a star-plucker, a genius, a celebrated author across the galaxy. None of that matters, though. [You can simply call me Ling. Before you get to know me, I have a few questions for you.] When life first tumbles into the world with a cry, the first thing it learns is to crawl, not think. When life is about to perish amid the scars of war, poverty, and illness, instinct drives it to flee, not think. Life is frail, yet it struggles desperately to survive through suffering. Even the strongest soul is housed in a feeble body. Not everyone is watched over by the gods, and not every disaster brings a savior. If all living beings want is to survive, where are we to go in this galaxy? If life is born weak, how are we to seek that glimpse of what is called eternity? Of course, you needn't answer me now. Even beings who presume to know everything fall silent when they hear my questions. “Ling, will there be a star called happiness in our paradise, too?” “Of course.” [I will find a way to make life eternal.] [I will make sure none of my beloved ever pass away again.] [If the world still needs an eternal Garden of Eden, I will create one for all living things.] There are only two things I care about in this galaxy now. First, finding a way to make life eternal. Second, my beloved…