I Became the Original Heroine's Arch-Nemesis in a Book?

Office worker Chen Wan wakes up inside a web novel—not as the protagonist, but as disposable cannon fodder destined to die by the heroine's hand. Armed with meta-knowledge and a pushy system, she fights to rewrite her fate in a world where the original heroine's plot armor makes survival a deadly game. But as Chen Wan carves out her own path, she discovers something unexpected: a purpose beyond mere survival. While the heroine ascends to glory, Chen Wan becomes the silent guardian of the nameless—transforming from a self-preserving extra into a warrior who'll sacrifice everything for a world o…