Heart Icon for Usernames Favorites:
Added a heart icon to the left side of the username input field.
The heart icon starts as black and changes to red when clicked.
Clicking the heart icon saves the current username to a list of favorites.
Clicking the heart icon again removes the username from the list of favorites.
Dropdown for Saved Usernames:
Added a dropdown arrow to the right side of the username input field.
Clicking the dropdown arrow toggles the display of a dropdown menu containing saved usernames.
Selecting a username from the dropdown updates the input field and the heart icon.
Auto-Save Username:
The username input field automatically saves the last entered username to localStorage.
The heart icon updates based on whether the current username is in the list of saved usernames.