amangh30/Stash-n-Grab ? reverse-engineered prompt

Build me a web app called Stash N Grab for mastery based learning.

I want it to let people browse learning paths, stash them into a personal vault, mark resources as completed, and track a daily streak, but only let them earn XP and move forward after passing a module exam. The creator side should let me build and edit paths with nested modules, resource lists, and multiple choice gatekeeper exams. The learner side should show progress, locked and unlocked modules, exam attempts, earned XP, and a profile page with their rank or showcase info.

Use a clean modern UI with a choice between a simple document style and a more neon vault style, and make the page feel smooth and polished with animated transitions. Add Google and GitHub login, MongoDB backed storage, and make sure XP and progress stay immutable even if a path later changes. If you need current docs for anything, look them up online first.