feat : Implement "Remember Me" Functionality on Login Form

[MehakGo]

Description : Implement "Remember Me" Functionality

To improve the user experience for returning users, a "Remember Me" feature should be added to the login form. When a user selects this option, their session should persist across browser sessions, so they do not have to log in every time they visit the application.

Tasks

• Add "Remember Me" Checkbox: Add a "Remember Me" checkbox to the Login.jsx component.
• Update Authentication Logic: Modify the authService to use localStorage instead of sessionStorage when the "Remember Me" option is selected. This will persist the JWT token across browser sessions.
• Handle Token Expiration: Ensure that the application gracefully handles expired tokens. If a persisted token is expired, the user should be redirected to the login page.
• Backend Consideration (Optional): The backend could be updated to issue a longer-lived JWT when "Remember Me" is selected, but this is not strictly necessary for the initial implementation.

Acceptance Criteria

• A "Remember Me" checkbox is present on the login form.
• When checked, the user remains logged in after closing and reopening the browser.
• When unchecked, the user is logged out after the browser session ends.

[MehakGo]

@lukiod I want to work on this issue under OSCI , please assign it to me.