Feature description

Add toast notifications to the "Stay Updated" email subscription section on the landing page. Currently, when a user enters their email and submits the form, there is no visual feedback the UI remains unchanged, leaving users uncertain whether their action succeeded or failed.

Proposed solution

Show a toast notification after the user interacts with the subscription form:
Success toast - "You're subscribed! Thanks for staying updated 🎉" . When a valid email is submitted
Error toast - "Please enter a valid email address." . When the field is empty or the email format is invalid

Additional context

Screen recording of the current behavior (no feedback) is attached for reference.