How to Open a Pull Request on GitHub

# Start from the latest main
git checkout main
git pull origin main

# Create a feature branch
git checkout -b fix-login-bug

# Work on your changes
git add .
git commit -m "Fix login bug when email contains special characters"

# Push to GitHub
git push -u origin fix-login-bug

## Description
Fixed a bug where users with special characters in their email
couldn't log in.

## Root Cause
The email validation regex didn't allow the '+' character.

## Changes
- Updated email regex in `validators.py`
- Added test cases for special characters

## Testing
- ✅ Unit tests pass
- ✅ Manual login tested with emails containing +, &, = 
- ✅ All existing tests pass

## Related Issues
Closes #142

✅ feat: add user profile page
✅ fix: correct email validation regex
✅ refactor: extract auth logic into service
❌ update stuff
❌ fix
❌ changes

✅ "The logic looks correct. Consider extracting this into a helper."
✅ "Can we add a test for the edge case where `data` is None?"
✅ "This change would affect the caching layer. Have we tested for that?"

❌ PR with 50 files changed (too large)
❌ No description ("Fixed bug" tells me nothing)
❌ Ignoring review comments
❌ Force pushing after review (overwrites reviewer progress)
❌ Merging without approval
❌ Resolving conversations without the reviewer agreeing