refactor: expand JWT algorithm support

refactor: implement stateless Supabase JWT validation to resolve 403 race conditions

feat: implement stateless JWT-based authentication with refresh tokens stored in HTTPOnly Cookies

fix: handle null sessions explicitly in auth context

feat: implement profile caching and optimize database client initialization.

feat: implement centralized token extraction via Request headers and add debug logging to search route

refactor: remove user headers from API requests and update list regex parsing logic

refactor: decouple Hugging Face token from user authentication by using X-Auth-Token for JWTs

feat: implement persistent user theme preferences across client and backend with profile synchronization

feat: Adding Parallel Processing and enhance main dashboard, summary and chat styles

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

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