ronisarkarexe/story-spark-ai ? reverse-engineered prompt

Build me a web app called StorySparkAI where someone can type a story idea and get back multiple creative story versions from the same prompt. I want it to feel friendly and modern, with a clean writing focused home page, a dark mode toggle, and a simple flow for generating stories, comparing versions side by side, and saving favorites or checking story history later.

Please include sign in with Google, a way to show helpful AI feedback like a creativity score, prompt improvements, summaries, or short critiques, and a place for user reviews and featured stories. Make the interface responsive so it works well on desktop and mobile, and add loading feedback so users can tell when a story is being generated.

Use the existing project setup and follow the current design style. If you need anything unclear, look up the current docs online or check the repo docs first.