Add form validation to login

[rimshashafique99]

Fixes #102

What changed:
Added validation to the login form before submit:

• Checks email contains "@"
• Checks password is at least 6 characters
• Checks name is required when registering

Testing:
Manually tested empty fields, invalid email, and short password — error messages display correctly using the existing error UI.

[anoopcodehack]

Hey, @rimshashafique99 your PR has been merged! You're officially a DevBoard contributor now!

If you enjoyed contributing and found the project useful, consider leaving a ⭐ on the repo — it really helps more developers discover the project and keeps the community growing!

Also feel free to pick up another issue anytime — always happy to have you here! 🙌

[rimshashafique99]

Thank you! This was my first open source contribution really appreciated the clear issue description and quick review. Will definitely pick up another issue soon 🙌

[anoopcodehack]

Hey, @rimshashafique99 your PR has been merged! You're officially a DevBoard contributor now!

If you enjoyed contributing and found the project useful, consider leaving a ⭐ on the repo — it really helps more developers discover the project and keeps the community growing!

Also feel free to pick up another issue anytime — always happy to have you here! 🙌