feat: maintenance page - site down on free tier, back when we get rich

Update README with contact info and remove templates

added redirect file

fix caching problem in vite config file

added notif in dashboard page

added leave team button

fixed github star url

Merge branch 'main' of https://github.com/talelboussetta/FocusGuard-ML

added notification on and off features for garden and also changed timer colors

Update contact information in README.md

Add database schema diagnostic and fix scripts

Replace AI Tutor with under construction page

Fix timezone mismatch in stats queries - use naive UTC

Fix: Use timezone-aware datetime for stats queries to prevent 500 errors

Fix: Re-enable table creation in background for production