fix: use Supabase Auth for real access tokens on login/signup

fix: fixing current user id logic

feat: implement Supabase token authentication and migrate user management to profiles table

feat: implement authentication system, add quiz history support, and update API endpoints for material and tutor interactions

refactor: rename project to Study Mate, update API endpoint, and add configuration files

feat: migrate UI to Next.js with extensive component library and integrate Hugging Face deployment workflow

refactor: restructure project into modular src architecture and implement database store layer