I need a sneaker marketplace app called SneakerHub. Start with the home page: Top search bar and category filters. Horizontal scroll displays popular sneakers and new release countdowns. Waterfall layout displays sneaker cards with each showing image, brand, model, size, and price (Bid/Ask). Quick access includes Release Calendar, Authentication, and Sneaker News. Bottom nav: Home, Market, Auth, and Profile (current: Home). Visual style: GOAT/StockX: Streetwear black-white, product showcase, price charts, hype culture