I want to create my own Image Genration app using flutter called Vistara AI, show modern App UI, must use Poppins font and lucid icon. Need professional, attractive UI. First show welcome message with circle Loading, no need login, register and etc. Direct use. After in home page show 3 line in left side with menu, Home, History, Settings, Gallery, App Info and etc show. Here is my dart "" and here is pubspec yaml "" 

Asset directive don't exit, and we don't need. Right now. Use google icon insted of lucid icons. I got error in this ""